Saturday, August 19, 2017

Winding a 1:4 Current Balun with 15 turns. Post #1224.


If you can't view this video, please insert this title URL into your browser search box: https://www.youtube.com/watch?v=IR-8T0QjUjM.

A 1:4 current balun is a handy device if you use 450 ohm ladder line, 300 ohm television twin lead, or homebrewed 600 ohm balanced line to feed your antenna. In this video from N7JFP, we see how to make a simple 1:4 HF Current Balun with 15 turns per side.  This balun uses a T-130-2 toroid and 18 gauge copper wire. N7JFP says this is a low power device (around 5 watts) suitable for 20 and 40 meters.

For the latest Amateur Radio news and information, please visit these websites:

http://www.HawaiiARRL.info.
https://oahuarrlnews.wordpress.com.
https://bigislandarrlnews.com.
https://paper.li/kh6jrm/1430289353 (Amateur Radio News & Information).
http://www.arrl.org.
http://www.arrl.org/arrl-audio-news (a weekly podcast which is updated every Friday afternoon).

Other sites of interest:

Hawaii Science Digest (https://paper.li/f-1476234615).
Hawaii Intelligence Digest (https://hawaiiintelligencedigest.com).
Hawaii Intelligence Daily (https://paper.li/f-1482109921).

Be sure to check the blog sidebars for more antenna and propagation articles.

Opinions expressed in this blog are mine unless otherwise stated.

Thanks for joining us today.

Aloha es 73 de Russ (KH6JRM)

Friday, August 18, 2017

Apartment loop antenna for HF. Post #1223.


If you can't view this video, please insert this title URL into your browser search box: https://www.youtube.com/watch/v=i6VrbsYsx6s.

If you live in a deed-restricted antenna environment (HOA/CC&R), this indoor loop from Joe Baille may enable you to get on the air.  According to Joe, he used 86 feet/26.219 meters of #16 AWG wire to form a two-turn loop around the ceiling of his apartment. He used a CG-3000 automatic antenna "tuner" to work several HF bands.  Although there is no commentary or test data provided by Joe, the antenna seems to work.  As long as you keep power below 10 watts you should have no problems with rfi.

For the latest Amateur Radio news and information, please visit these websites:

http://www.HawaiiARRL.info.
https://oahuarrlnews.wordpress.com.
https://bigislandarrlnews.wordpress.com.
https://paper.li/kh6jrm/1430289353 (Amateur Radio News & Information).
http://www.arrl.org.
http://www.arrl.org/arrl-audio-news (a weekly podcast which is updated each Friday afternoon).

Other sites of interest:

Hawaii Science Digest (https://paper.li/f-1476233615).
Hawaii Intelligence Digest (https://hawaiiintelligencedigest.com).
Hawaii Intelligence Daily (https://paper.li/f-1482109921).

Be sure to check the blog sidebars for more antenna and propagation articles.

Opinions expressed in this blog are mine unless otherwise stated.

Thanks for joining us today.

Aloha es 73 de Russ (KH6JRM)

Thursday, August 17, 2017

Building the 80m horizontal loop @PE4BAS. Post #1222.


If you can't view this video, please insert this title URL into your browser search box: https://www.youtube.com/watch?v=u4efv1tb3ME.

If you have the space, time, and the help of a few close friends, this full-sized 80 meter loop antenna will be worth the effort to design, build, erect, and use. In this video, Bas Lev (PE4BAS show us the 4-hour project compressed into a few short minutes. With a bit of help from friends or your radio club, construction time can be reduced significantly.  While this antenna is perfect for NVIS (near vertical incident skywave) propagation, it will also perform well on several Amateur Radio HF bands if 450-ohm ladder line or 300-ohm television twin lead is used in conjunction with a balanced antenna "tuner." This loop antenna would be useful on ARRL Field Day events or other portable operations now that propagation is favoring the lower HF bands.

For the latest Amateur Radio news and information, please visit these websites:

http://www.HawaiiARRL.info.
https://oahuarrlnews.wordpress.com.
https://bigislandarrlnews.com.
http://www.arrl.org.
http://www.arrl.org/arrl-audio-news (a weekly podcast which is updated each Friday afternoon).
https://paper.li/kh6jrm/1430289353 (Amateur Radio News & Information).

Other sites of interest:

Hawaii Science Digest (https://paper.li/f-1476233615).
Hawaii Intelligence Digest (https://hawaiiintelligencedigest.com).
Hawaii Intelligence Daily (https://paper.li/f-1482109921).

Be sure to check the blog sidebars for more antenna and propagation articles.

Opinions expressed in this blog are mine unless otherwise stated.

Thanks for joining us today.

Aloha es 73 de Russ (KH6JRM)


Wednesday, August 16, 2017

Portable Solar Powered GoKit for Ham Radio. Post #1221.


If you can't view this video, please insert this title URL into your browser search box: https://www.youtube.com/watch?v=1_Q0ORT93M.

Here's another informative and well-produced tutorial from Julian (OH8STN), the creator of Survival Tech Nord. Over the past few weeks, Julian has produced a series of videos on "Man Portable Off-grid Power for Amateur Radio". This video addresses the use of solar power for your emergency "GoKit".  Julian's explanations are clear, simple, and thoroughly understandable.  He also discusses
antennas and other equipment needed for portable and emergency operations.

For the latest Amateur Radio news and information, please visit these websites:

http://www.HawaiiARRL.info.
https://oahuarrlnews.wordpress.com.
https://bigislandarrlnews.com.
http://www.arrl.org.
http://www.arrl.org/arrl-audio-news (a weekly podcast which is updated each Friday afternoon).
https://paper.li/kh6jrm/1430289353 (Amateur Radio News & Information).

Other sites of interest:

Hawaii Science Digest (https://paper.li/1476233615).
Hawaii Intelligence Digest (https://hawaiiintelligencedigest.com).
Hawaii Intelligence Daiy (https://paper.li/f-1482109921).

Be sure to check the blog sidebars for more antenna and propagation articles.

Opinions expressed in this blog are mine unless otherwise stated.

Thanks for joining us today.

Aloha es 73 de Russ (KH6JRM)


Tuesday, August 15, 2017

Sloping Dipole Feed Options. Post #1220.


If you can't view this video, please insert this title URL into your browser search box: https://www.youtube.com/watch?v=I-s7pbFZyUY.

If you want full dipole antenna performance but don't have enough space to erect a full-half wavelength horizontal dipole, then a simple sloping dipole antenna may be the answer.  In video, Stan Gibilisco (W1GV) presents a simple tutorial on how to design, build, and use a slopping dipole antenna.  All you need is one tall support and a place to tie off the bottom part of the sloper.  Stan also discusses what portion of the sloper should be attached to the center pin of your coax feed line.  A simple, inexpensive antenna that will keep you on the air in a restricted space environment.

For the latest Amateur Radio news and information, please visit these websites:

http://www.HawaiiARRL.info.
https://oahuarrlnews.wordpress.com.
https://bigislandarrlnews.com.
http://www.arrl.org.
http://www.arrl.org/arrl-audio-news (a weekly podcast that is updated each Friday afternoon).
https://paper.li/kh6jrm/1430289353 (Amateur Radio News & Information).

Other sites of interest:

Hawaii Science Digest (https://paper.li/f-1476233615).
Hawaii Intelligence Digest (https://hawaiiintelligencedigest.com).
Hawaii Intelligence Daily (https://paper.li/1482109921).

Be sure to check the blog sidebars for more antenna and propagation articles.

Opinions expressed in this blog are mine unless otherwise stated.

Thanks for joining us today.

Aloha es 73 de Russ (KH6JRM)

Monday, August 14, 2017

Wilson's (W4BWH) new Carolina Windom 160 Amateur Radio Antenna. Post #1219.


If you can't view this video, please insert this title URL into your browser search box: https://www.youtube.com/watch?v=Peq69M02Bvk.

Sometimes, you have to let your imagination run wild, especially when it comes to antennas. In this video, Wilson Hines (W4BWH) finds himself with a lot of property to erect a huge antenna--in this case a 265-foot/80.79 meters "Carolina Windom Antenna." Wilson says he gets great signal reports on all Amateur Radio bands from 160 through 10 meters.  While most of us don't have the room for such a monstrous antenna, we can certainly maximize the space we do have by designing antennas that are efficient and well-built.

For the latest Amateur Radio news and information, please visit these websites,

http://www.HawaiiARRL.info.
https://oahuarrlnews.wordpress.com.
https;//bigislandarrlnews.com.
http://www.arrl.org.
http://www.arrl.org/arrl-audio-news (a weekly podcast updated each Friday afternoon).
https://paper.li/kh6jrm/1430289353 (Amateur Radio News & Information).

Other sites of interest:

Hawaii Intelligence Digest (https://hawaiiintelligencedigest.com).
Hawaii Intelligence Daily (https://paper.li/f-1482109921).
Hawaii Science Digest (https://paper.li/1476233615).

Be sure to check the blog sidebars for more antenna and propagation articles.

Opinions expressed in this blog are mine unless otherwise stated.

Thanks for joining us today.

Aloha es 73 de Russ (KH6JRM)

Sunday, August 13, 2017

How To Build A Delta Loop Antenna. Post#1218.


If you can't view this video, please insert this title URL into your browser search box: https://www.youtube.com/watch?v=1uUVMaRFMv4.

Here's a simple antenna that you may want to try for your next Amateur Radio activity. In this video, Hiram Vazquez takes us step-by-step in the design, building, and use of a Delta Loop Antenna.  The Delta Loop receives well, exhibits low noise, shows some gain over a dipole antenna (about 3 dB), and can be built from locally available materials.  You can feed a delta loop antenna with 50-ohm coaxial cable for single band use or with 450 ohm ladder line for multiband use. For multiband coverage, design the antenna for the lowest frequency of use, use 450 ohm ladder line as a feeder, and run the feeder through a balanced antenna "tuner" or a 4:1 balun before connecting the antenna system to your HF transceiver.

For the latest Amateur Radio news and information, please visit these sites:

http://www.HawaiiARRL.info.
https://oahuarrlnews.wordpress.com.
https://bigislandarrlnews.com.
http://www.arrl.org.
http://www.arrl.org/arrl-audio-news (a weekly podcast updated each Friday afternoon).
https://paper.li/kh6jrm/1430289353 (Amateur Radio News & Information).

Other sites of interest:

Hawaii Science Digest (https://paper.li/1476233615).
Hawaii Intelligence Digest (https://hawaiiintelligencedigest.com).
Hawaii Intelligence Daily (https://paper.li/1482109921).

Be sure to check the blog sidebars for more antenna and propagation articles.

Opinions expressed in this blog are mine unless otherwise stated.

Thanks for joining us today.

Aloha es 73 de Russ (KH6JRM)

Saturday, August 12, 2017

Ugly Balun 10 - 80 mtr. (RF Choke). Post #1217.


If you can't view this video, please insert this title URL into your browser search box: https://www.youtube.com/watch?v=tVVCbaRAUWk.

Here's a handy device that will keep rf off your coaxial cable feed line. PD1AIV has done an excellent video tutorial covering the basic tools, materials, and construction practices needed in making an "ugly balun" or RF choke suitable for 8o through 10 meters. You will need around 19 to 21 feet (5.49 to 6.40 meters) of 50 ohm coaxial cable plus fittings to make the choke. PVC pipe, screws and nuts, and a few connectors will be all you need to complete this project.

For the latest Amateur Radio news and information, please visit these websites:

http://www.HawaiiARRL.info.
https;//oahuarrlnews.wordpress.com.
https://bigislandarrlnews.com.
http://www.arrl.org.
http://www.arrl.org/arrl-audio-news (a weekly podcast updated each Friday afternoon).
https://paper.li/kh6jrm/1430289353 (Amateur Radio News & Information).

Other sites of interest:

Hawaii Science Digest (https://paper.li/f-1476233615).
Hawaii Intelligence Digest (https://hawaiiintelligencedigest.com).
Hawaii Intelligence Daily (https://paper.li/f-1482109921)

Be sure to check the blog sidebars for more antenna and propagation articles.

Opinions expressed in this blog are mine unless otherwise stated.

Thanks for joining us today.

Aloha es 73 de Russ (KH6JRM)

Friday, August 11, 2017

Multiband Dipole Antenna. Post #1216.


If you can't view this video, please insert this title URL into your browser search box: https://www.youtube.com/watch?v-wH0RNIr9cqE.

Experimenting with antennas and limited spaces is fun and educational.  In this video, we see how a garden in the UK can be used to accommodate a homebrew dipole antenna.  According to "Daz", this 108-ft/32.92 meter antenna works on all bands from 80 to 10 meters "without any problems." Although coaxial cable is used as the feed line into an antenna "tuner", he concedes that ladder line would probably work better. He used an "air coil" made from 7 turns of coax at the base of the antenna. Despite the antenna's appearance and length to fit dimensions, it worked well. Don't be afraid of trying various antenna designs--that's part of the fun of Amateur Radio.

For the latest Amateur Radio news and information, please visit these websites:

http://www.HawaiiARRL.info.
https://oahuarrlnews.wordpress.com.
https://bigislandarrlnews.com.
http://www.arrl.org.
http://www.arrl.org/arrl-audio-news (a weekly podcast updated each Friday afternoon).
https://paper.li/kh6jrm/1430289353 (Amateur Radio News & Information).

Other sites of interest:

https://paper.li/f-1476233615 (Hawaii Science Digest).
https://hawaiiintelligencedigest.com (Hawaii Intelligence Digest).
https://paper.li/f-1482109921 (Hawaii Intelligence Daily).

Be sure to check the blog sidebars for more antenna and propagation articles.

Opinions expressed in this blog are mine unless otherwise stated.

Thanks for joining us today.

Aloha es 73 de Russ (KH6JRM)

Wednesday, August 9, 2017

Operating Stealthy from a Condo - CQ WPX SSB 2017. Post #1215.


If you can't view this video, please insert this title URL into your browser search box: https://www.youtube.com/watch?v=MyML4xIGQ0.

Nicely done video from Thomas (rcobo101)(AC2RJ), showing us how to operate HF QRP SSB temporarily from a HOA zone.  His antenna was supported on a 20 foot/6.097 meters telescoping fishing pole with a 16 foot/4.878 meters counterpoise.  His Yaesu-817 QRP HF transceiver did very well on the 20 meter band during the recent CQ WPX SSB 2017 contest.  Don't let deed-restricted properties stop your enjoyment of Amateur Radio.

For the latest Amateur Radio News and Information, please visit these sites:

http://www.HawaiiARRL.info.
https://oahuarrlnews.wordpress.com.
https://bigislandarrlnews.com.
http://www.arrl.org.
http://www.arrl.org/arrl-audio-news (a weekly podcast updated each Friday afternoon).
https://paper.li/kh6jrm/1430289353 (Amateur Radio News & Information).

Other sites of interest:

Hawaii Science Digest (https://paper.li/f-1476233615).
Hawaii Intelligence Digest (https://hawaiiintelligencedigest.com).
Hawaii Intelligence Daily (https://paper.li/f-1482109921).

Be sure to check the blog sidebars for more antenna and propagation articles.

Opinions expressed in this blog are mine unless otherwise stated.

Thanks for joining us today.

Aloha es 73 de Russ (KH6JRM)

Tuesday, August 8, 2017

Multiband HF portable antenna, the easy way. Post #1214.


If you can't view this video, please insert this title URL into your browser search box: https://www.youtube.com/watch?v=ofmUK8o7Jxg.

Thanks to "rcobo 101" for this simple, effective, multiband HF vertical antenna. Basically, the antenna is a vertical helix wrapped with 1/2 wavelength of wire for the lowest band of operation.  The winding serves as a 1/4 wavelength vertical and can be used with a suitable ground radio/counterpoise system and antenna "tuner" for the HF band of choice.  Although multiband operation is certainly possible with an antenna "tuner", this particular design works best on the band of your choice.  In this video, "rcobo 101" used 35 feet/10.670 meters of speaker wire wrapped as a helix on a 20 foot/6.097 meters telescoping fishing pole.  As such, this antenna is ideal for the 20 meter band.  According to "rcobo 101", his antenna "tuner" allows satisfactory operation on all amateur radio bands from 40 through 6 meters.  All you need to do is provide a sturdy tripod for support and attach a ground radial/counterpoise system for successful operation. I've built several of these vertical helix antennas, and despite their narrow bandwidth, they seem to work as well as a "normal" 1/4 wavelength vertical.

For the latest Amateur Radio news and information,  please visit these websites:

http://www.HawaiiARRL.info.
https://oahuarrlnews.wordpress.com.
https://bigislandarrlnews.com.
http://www.arrl.org.
http://www.arrl.org/arrl-audio-news (a weekly podcast updated each Friday afternoon).
https://paper.li/kh6jrm/1430289353 (Amateur Radio News & Information).

Other sites of interest:

Hawaii Science Digest (https://paper.li/f-1476233615).
Hawaii Intelligence Digest (https://hawaiiintelligencedigest.com).
Hawaii Intelligence Daily (https://paper.li/f-1482109921).

Be sure to check the blog sidebars for more antenna and propagation articles.

Opinions expressed in this blog are mine unless otherwise stated.

Thanks for joining us today.

Aloha es 73 de Russ (KH6JRM)

Monday, August 7, 2017

Easy Mobile Camp Setup. Post #1213.


If you can't view this video, please insert this title URL into your browser search box: https://www.youtube.com/watch?v=5QmuycdeMyA.

Camping and Amateur Radio make an excellent combination.  Enjoy the beauty and solitude of the great outdoors while contacting the world with your portable "Go-Kit." Here's a nicely done video from K0PIR made during a camping trip to the Black Fox campground in the Black Hills of South Dakota...great scenery complimented by a fast flowing stream and pleasant surroundings. K0PIR's simple operating system is more than enough to get you plenty of contacts.  A simple antenna (with ground system if you're using a vertical antenna), a small antenna "tuner", a multiband HF transceiver, and a solar-powered battery should give you hours of fun and relaxation without all of the noise, traffic, and confusion of an urban setting.

For the latest Amateur Radio news and information, please visit these sites:

http://www.HawaiiARRL.info.
https://oahuarrlnews.wordpress.com.
https://bigislandarrlnews.com.
http://www.arrl.org.
http://www.arrl.org/arrl-audio-news (a weekly podcast updated each Friday afternoon).
https://paper.li/kh6jrm/1430289353 (Amateur Radio News & Information).

Other sites of interest:

Hawaii Science Digest (https://paper.li/f-1476233615).
Hawaii Intelligence Digest (https://hawaiiintelligencedigest.com).
Hawaii Intelligence Daily (https://paper.li/f-1482109921).

Be sure to check the blog sidebars for more antenna and propagation articles.

Opinions expressed in this blog are mine unless otherwise stated.

Thanks for joining us today.

Aloha es 73 de Russ (KH6JRM)

Sunday, August 6, 2017

The 6 meter Delta Loop Tutorial. Post #1212.


If you can't view this video, please insert this title URL into your browser search box: https://www.youtube.com/watch?v=IZkWPP13S6k.

An exceptionally well-made tutorial on how to build a simple delta loop antenna for the 6 meter Amateur Radio band.  Martin (M0ZMF) does an outstanding job of taking you through each step of the design and building process. This simple delta loop has excellent and proven performance.

For the latest Amateur Radio news and information, please visit these websites:

http://www.HawaiiARRL.info.
https://oahuarrlnews.wordpress.com.
https://bigislandarrlnews.com.
http://www.arrl.org.
http://www.arrl.org/arrl-audio-news (a weekly podcast which is updated each Friday afternoon).
https://paper.li/kh6jrm/1430289353 (Amateur Radio News & Information).

Other sites of interest:

https://paper.li/1476233615 (Hawaii Science Digest).
https://hawaiiintelligencedigest.com (trends in geopolitical intelligence and cybersecurity).
https://paper.li/f-1482109921 (My daily intelligence briefing).

Be sure to check the blog sidebars.  These news feeds are updated daily.

Opinions expressed in this blog are mine unless otherwise stated.

Thanks for joining us today.

Aloha es 73 de Russ (KH6JRM)

Saturday, August 5, 2017

W2LI Magnetic Loop Antenna. Post #1211.


W2LI Magnetic Loop Antenna
(http://www.eham.net/reviews/detail/13332#148452).
http://www.w2li.org/magloop).
Author:  W2LI.
Accessed on 05 August 2017, 21:05 hrs, UTC.
Please click links or insert title URL into your browser search box to read the full article.

Comment:

Over the past few months, I've republished several videos and articles about magnetic loop antennas from the worldwide Amateur Radio community. Whether they be commercially made or homebrewed by radio amateurs, magnetic loops have allowed those with restrictive housing arrangements (HOAs and CC&Rs) to enjoy both HF and VHF/UHF radio operations again.  Magnetic Loop Antennas are easy to set up and break down, making them ideal for portable, emergency, and home use.

While I enjoy making my own HF antennas, I can see the need for a sturdy, easy to assemble antenna for those of us lacking the resources for antenna parts or have little skill in designing and building antennas.  This is where products, such as the W2LI Magnetic Loop Antenna, enter the antenna arena.

This antenna can offer a reasonably-priced, easy to assemble magnetic loop antenna for those of us who can't get on the air anyother way.

Here's a brief description of the antenna from the manufacturer:


Reviews: 3Average rating: 5.0/5MSRP: $$165
Description: The W2LI Magloop is an affordable, QRP antenna system 
designed for quick deployment, portable use, HOA/apartment 
dwellers, and excellent RX characteristics. It is compact, 
easily fitting into a backpack, and gives continuous 
transmitting coverage from 7 MHz through 14.350 MHz, 
covering 3 of the most popular ham bands. Magloop antennas 
are known for their relative efficiency when compared to 
their physical size, and are known for being "quiet" on 
receive compared to many other antennas, especially dipoles 
and verticals.
------------------------------------------------------------------------------------------------------------------------------------------------
------------------------------------------------------------------------------------------------------------------------------------------------
Accompanying the description are three reviews by WJ1R, N2LRB, and AC8UO. All of the reviews confirm the performance and ease of assembly of this magnetic loop antenna. 
You may want to consider the W2LI QRP Magnetic Loop Antenna if you want an easy and stealthy war to get on the air.
------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

For the latest Amateur Radio news and information, please visit these websites:


http://www.HawaiiARRL.info.
https://oahuarrlnews.wordpress.com.
https://bigislandarrlnews.com.
http://www.arrl.org.
http://www.arrl.org/arrl-audio-news (a weekly podcast updated each Friday afternoon).
https://paper.li/kh6jrm/1430289353 (Amateur Radio News & Information).

Other sites of interest:

https://paper.li/1476233615 (Hawaii Science Digest).
https://hawaiiintelligencedigest.com (trends in geopolitical intelligence and cybersecurity).
https://paper.li/f-1482109921 (My Daily Intelligence Briefing).

Be sure to check the blog sidebars for more antenna and propagation articles.

Opinions expressed in this blog are mine unless otherwise stated.

Thanks for joining us today.

Aloha es 73 de Russ (KH6JRM(


Friday, August 4, 2017

Bicycle Rim Magnetic Loop Ham Radio Antenna - Homebrew de KK6FUT. Post #1210.


If you can't view this video, please insert this title URL into your browser search box: https://www.youtube.com/watch?v=e3_Iaf7dIo0.

This antenna project is one of the things that makes Amateur Radio so fun and fascinating--turning junk into something useful. In this case, KK6FUT has converted an old bicycle wheel/rim into a homebrewed magnetic loop antenna for the 15 meter and 20 meter ham bands.  The loop is made from a discarded bicycle wheel/rim after the spokes have been removed. KK6FUT made slits with a hacksaw and used an old AM/FM variable capacitor for tuning. While this loop is primarily for receiving, it can be used to transmit with a 4 to 5 watt signal. SWR measurements are quite good--1.0:1 on 15 meters and 1.4:1 on 20 meters.

For the latest Amateur Radio news and information, please visit these websites:

http://www.HawaiiARRL.info.
https://oahuarrlnews.wordpress.com.
https://bigislandarrlnews.com.
http://www.arrl.org.
http://www.arrl.org/arrl-audio news (a weekly podcast updated each Friday afternoon).
https://paper.li/kh6jrm/1430289353 (Amateur Radio News & Information).

Other sites of interest:

https://paper.li/1476233615 (Hawaii Science Digest).
https://hawaiiintelligencedigest.com (trends in geopolitical intelligence and cybersecurity).
https://paper.li/f-1482109921 (My Daily Intelligence Briefing).

Be sure to check the blog sidebars for more antenna and propagation articles.

Opinions expressed in this blog are mine unless otherwise stated.

Thanks for joining us today.

Aloha es 73 de Russ (KH6JRM)

Thursday, August 3, 2017

Ham radio 40 meter homebrew ground mount vertical. Post #1209.


If you can't view this video, please insert this title URL into your browser search box: https://www.youtube.com/watch?v=2qEQN_FV0Pk.

A simple vertical antenna can be an amazingly effective way to launch your signals, especially if you lack the space to erect a dipole, inverted vee, or even a small yagi-uda beam.  In this video. Ric (K8YIO) show us his simple vertical antenna and ground radial system. Most of the materials can be found at the nearest hardware or building supply outlet.  This simple antenna has given Ric plenty of DX.  The video is loaded with lots of suggestions that will help you design, build, and use this antenna at your home station.

For the latest Amateur Radio news and information, please visit these websites:

http://www.HawaiiARRL.info.
https://oahuarrlnews.wordpress.com.
https://bigislandarrlnews.com.
http://www.arrl.org.
http://www.arrl.org/arrl-audio-news (a weekly podcast updated each Friday afternoon).
https://paper.li/kh6jrm/1430289353 (Amateur Radio News & Information).

Other sites of interest:

https://paper.li/f-1476233615 (Hawaii Science Digest).
https://hawaiiintelligencedigest.com (trends in geopolitical intelligence and cybersecurity).
https://paper.li/f-1482109921 (My Daily Intelligence Briefing).

Be sure to check the blog sidebars.  These news feeds are updated daily.

Opinions expressed in this blog are mine unless otherwise stated.

Thanks for joining us today.

Aloha es 73 de Russ (KH6JRM)

Wednesday, August 2, 2017

How-to build your own HF Antenna Splitter. Post #1208.


If you can't view this video, please insert this title URL into your browser search box: https://www.youtube.com/watch?v=8dDmfb4NMYw.

Here's a low-cost answer to a common problem shared by shortwave listeners and radio amateurs. Namely, how to connect one antenna among several radios. The answer is found in a simple HF Antenna Splitter that you can build yourself. The HF splitter is for listening only.  The splitter is not intended for transmitting.

"The Radio Hobbyist" has done an excellent job of showing the assembly of this simple, useful tool.  While you can find HF splitters online, you may want to save some money and build one yourself.

For the latest Amateur Radio news and information, please visit these websites:

http://www.HawaiiARRL.info.
https://oahuarrlnews.wordpress.com.
https://bigislandarrlnews.com.
http://www.arrl.org.
http://www.arrl.org/arrl-audio-news ( a weekly podcast which is updated every Friday afternoon).
https://paper.li/kh6jrm/1430289353 (Amateur Radio News & Information).

Other sites of interest:

https://paper.li/f-1476233615 (Hawaii Science Digest).
https://hawaiiintelligencedigest.com (trends in geopolitical intelligence and cybersecurity).
https://paper.li/f-1482109921 (My Daily Intelligence Briefing).

Be sure to check the blog sidebars for more antenna and propagation articles.

Opinions expressed in this blog are mine unless otherwise stated.

Thanks for joining us today.

Aloha es 73 de Russ (KH6JRM)

Tuesday, August 1, 2017

How To Make A NVIS HF Radio Antenna. Post #1207.


If you can't view this video, please insert this title URL into your browser search box: https://www.youtube.com/watch?v=I_VmFGVAR7k,

NVIS (near vertical incident skywave) antennas are perfect for local, state, and regional communications during portable or emergency operations.  NVIS antennas radiate signals at a high angle, making them ideal for coverage out to approximately 300 miles/486 kilometers.  I've used low-slung dipoles (approximately 17-feet/5.182 meters above ground) for local Hawaii nets and rag chews around the state.

In this video from "Commsprepper", we learn how to set up a basic NVIS antenna based on a design from W9WIS (http://w9wis.us/NVIS.html). This antenna is simple, easy to erect, and inexpensive.  Other NVIS antennas can be configured as tuned end-fed wires, low level loops, and even magnetic loops. Have some fun and build a NVIS antenna today.

For the latest Amateur Radio news and information, please check these websites:

http://www.HawaiiARRL.info.
https://oahuarrlnews.wordpress.com.
https://bigislandarrlnews.com.
http://www.arrl.org.
http://www.arrl.org/arrl-audio-news (a weekly podcast updated every Friday afternoon).
https://paper.li/kh6jrm/1430280353 (Amateur Radio News & Information).

other sites of interest:

https://paper.li/f-1476233615 (Hawaii Science Digest).
https://hawaiiintelligencedigest.com (trends in geopolitical intelligence and cybersecurity).
https://paper.li/f-1482109921 (My Daily Intelligence Briefing).

Be sure to check the blog sidebars for more antenna and propagation articles.

Opinions expressed in this blog are mine unless otherwise stated.

Thanks for joining us today.

Aloha es 73 de Russ (KH6JRM)

Monday, July 31, 2017

Making and Using a Simple 40-m Dipole (#86). Post #1206.


If you can't view this video, please insert this title URL into your browser search box: https://www.youtube.com/watch?v=gfLUrVnnQUI.

I always enjoy the "laid back" and relaxing manner in which Dave Casler presents his video tutorials. This one is no exception. In this video, Dave explains how to make and use a simple 40-meter dipole antenna from commonly available parts around your shack or home. Other materials can be found at the nearest building supply or hardware store.  In this case, Dave was able to make this antenna at no cost, thanks to the materials he had in his home. This is a classic case of time vs. money.  If you're willing to spend a few hours of free time making this antenna, you'll save money and have a lot of fun at the end of your labors.

For the latest Amateur Radio News and Information, please visit these websites:

http://www.HawaiiARRl.info.
https://oahuarrlnews.wordpress.com.
https://bigislandarrlnews.com.
http://www.arrl.org.
http://www.arrl.org/arrl-audio-news (a weekly podcast updated each Friday afternoon).
https://paper.li/kh6jrm/1430289353 (Amateur Radio News & Information).

Other sites of interest:

https://paper.li/f-1476233615 (Hawaii Science Digest).
https://hawaiiintelligencedigest.com (trends in geopolitical intelligence and cybersecurity).
https://paper.li/f-1482109921 (My Daily Intelligence Briefing).

Be sure to check the blog sidebars for more antenna and propagation articles.

Opinions expressed in this blog are mine unless otherwise stated.

Thanks for joining us today.

Aloha es 73 de Russ (KH6JRM)

Sunday, July 30, 2017

Emergency Shack Setup. Post #1205.


If you can't views this video, please insert this title URL into your browser search box: https://www.youtube.com/watch?v-JnKjPIOI7Tg.

Every radio amateur should have an emergency backup system in his/her shack. In this video from Joe Lalumia ("Telescope Man"), we see a simple arrangement of spare equipment that allows emergency operation when natural or human-made disaster strikes.

Radios in use are a Kenwood 281 for 2 meters, an ICOM-7200 for HF, and a handheld Uniden scanner receiver for monitoring the public service bands.  Joe's antennas include a Buddipole, MFJ hamsticks for various HF bands, an Alpha-Delta DXCC, a QSO King, and a dual band cushcraft 270.  Perhaps this video will encourage you to create your own backup system in your radio room.

For the latest Amateur Radio news and information, please visit these websites:

http://www.HawaiiARRL.info.
https://oahuarrlnews.wordpress.com.
https://bigislandarrlnews.com.
http://www.arrl.org.
http://www.arrl.org/arrl-audio-news (a weekly podcast which is updated on Friday).
https://paper.li/kh6jrm/1430289353 (Amateur Radio News & Information).

Other sites of interest:

https://paper.li/f-1476233615 (Hawaii Science Digest).
https://hawaiiintelligencedigest.com (trends in geopolitical intelligence and cybersecurity).
https://paper.li/f-1482109921 (My Daily Intelligence Briefing).

Be sure to check the blog sidebars for more antenna and propagation articles.

Opinions expressed in this blog are mine unless otherwise stated.

Thanks for joining us today.

Aloha es 73 de Russ (KH6JRM)

Saturday, July 29, 2017

Building a Portable 6-el. VHF 2m Yagi-Uda Antenna.. Post #1204.


If you can't view this video, please insert this title URL into your browser search box: https://www.youtube.com/watch?v=6quIk_X3QIE.

"Radio Prepper" does an excellent job of taking us through the design, construction, and use of a simple 6-element Yagi-Uda antenna for the 2 meter Amateur Radio band.  The original design can be found at this website: https://m0ukd.com/homebrew/antennas/144mhz-2m-portable-yagi-vhf-beam-antenna.

This antenna can be used at your home station or for portable or emergency operations.  If you have difficulty reaching a repeater in your area, this antenna can help resolve that issue.  Depending on how you orient the antenna (horizontal or vertical), you can use this yagi for 2 meter SSB contacts, which tend to favor horizontal polarization.

For the latest Amateur Radio news and information, please visit these websites:

http://www.HawaiiARRL.info.
https://oahuarrlnews.wordpress.com.
https://bigislandarrlnews.com.
http://www.arrl.org.
http://www.arrl.org/arrl-audio-news (a weekly podcast updated each Friday afternoon).
https://paper.li/kh6jrm/1430289353 (Amateur Radio News & Information).

Other sites of interest:

https://paper.li/f-1476233615 (Hawaii Science Digest).
https://hawaiiintelligencedigest.com (trends in geopolitical intelligence and cybersecurity).
https://paper.li/f-1482109921 (My Daily Intelligence Briefing).

Be sure to check the blog sidebars for more antenna and propagation articles.

Opinions expressed in this blog are mine unless otherwise stated.

Thanks for joining us today.

Aloha es 73 de Russ (KH6JRM)

Friday, July 28, 2017

Ham Radio Go Kit v2.0 [EMCOMM]. Post #1203.


If you can't view this video, please insert this title URL into your browser search box: https://www.youtube.com/watch?v=wMmnUiyH0eI.

Here's another great and instructive video tutorial from Julian (OH8STN), whose "Survival Tech Nord" website provides a treasure trove of practical ideas and projects for the radio amateur.

In this video, Julian shows us his Ham Radio Go-Kit, something that all radio amateurs should have in case of emergencies.  Julian's Go-Kit is built around the popular Yaesu-817ND qrp transceiver and the Chameleon Antenna MPAS (modular portable antenna system).  This portable ham radio station is great for training, emergency communications, and just plain radio fun in the great outdoors.

For the latest Amateru Radio news and information, please visit these sites:

http://www.HawaiiARRL.info.
https://oahuarrlnews.wordpress.com.
https://bigislandarrlnews.com.
http://arrl.org.
http://arrl.org/arrl-audio-news (a weekly podcast updated every Friday afternoon).
https://paper.li/kh6jrm/1430289353 (Amateur Radio News & Information).

Other sites of interest:

https://paper.li/f-1476233615 (Hawaii Science Digest).
https://hawaiiintelligencedigest.com (trends in geopolitical intelligence and cybersecurity).
http://paper.li/f-1482109921 (My Daily Intelligence Briefing).

Be sure to check the blog sidebars for more antenna and propagation articles.

Opinions expressed in this blog are mine unless otherwise stated.

Thanks for joining us today.

Aloha es 73 de Russ (KH6JRM)



Thursday, July 27, 2017

Ham Radio via Bicycle Mobile on 6m with IC703. Post #1202.


If you can't view this video, please insert this title URL into your browser search box: https://www.youtube.com/watch?v=_tknnqTC-7A.

Bicycle mobile is a fun way to enjoy the great outdoors and get on the air at the same time.  In this video, Steve (WG0AT), sometimes known as "The Old Goat", equips his mountain bike with a battery, a 6 meter Buddipole antenna, and an old IC-703 QRP rig.  The video shows some fascinating contacts on the road, including Randy (K7TQ) in Moscow, Idaho operating pedestrian mobile. Perhaps you may want to try this form of mobile Amateur Radio.

For the latest Amateur Radio news and information, please visit these websites:

http://www.HawaiiARRL.info.
https://oahuarrlnews.wordpress.com.
https://bigislandarrlnews.com.
http://www.arrl.org.
http://www.arrl.org/arrl-audio-news (a weekly podcast update each Friday afternoon).
https://paper.li/kh6jrm/1430289353 (Amateur Radio News & Information).

Other sites of interest:

https://paper.li/f-1476233615 (Hawaii Science Digest).
https://hawaiiintelligencedigest.com (trends in geopolitical intelligence and cybersecurity).
https://paper.li/f-1482109921 (My Daily Intelligence Briefing).

Be sure to check the blog sidebars for more antenna and propagation articles.

Opinions expressed in this blog are mine unless otherwise stated.

Thanks for joining us today.

Aloha es 73 de Russ (KH6JRM)

Wednesday, July 26, 2017

RF and Antenna Basics in 802 11. Post#1201.


If you can't view this video, please insert this title URL into your browser search box: https://www.youtube.com/watch?v=tyr_u8Zfw2U.

This video tutorial from Hank Ottey does an excellent job of explaining RF and Antenna Basics as they apply to 802.11 wireless systems.

The tutorial covers two broad areas:

Aspects of Antennas (gain and signal speed; reciprocity; range; and mounting).

Enemies of Signal Quality (multipath; obstructions; Fresnel Zones; and weather).

Each section is well-illustrated with graphs, photos, and other data.

For the latest Amateur Radio news and information, please visit these sites:

http://www.HawaiiARRL.info.
https://oahuarrlnews.wordpress.com.
https://bigislandarrlnews.com.
http://www.arrl.org.
http://www.arrl.org/arrl-audio-news (a weekly podcast updated every Friday afternoon).
https://paper.li/kh6jrm/1430289353 (Amateur Radio News & Information).

Other sites of interest:

https://paper.li/f-1476233615 (Hawaii Science Digest).
https://hawaiiintelligencedigest.com (trends in geopolitical intelligence and cybersecurity).
https://paper.li/f-1482109921 (My Daily Intelligence Briefing).

Be sure to check the blog sidebars for more antenna and propagation articles.

Opinions expressed in this blog are mine unless otherwise stated.

Thanks for joining us today.

Aloha es 73 de Russ (KH6JRM)

Tuesday, July 25, 2017

HF J-Pole. Post #1200.


HF J-Pole
(http://www.eham.net/articles/39180).
Accessed on 25 July 2017, 20:00 hrs, UTC.
Author:  Mike Higgins (K6AER).
Please enter link into your browser search box to read the full article.

Comment:

Most radio amateurs are acquainted with the J-Pole antenna, which finds a ready application for our shared VHF/UHF bands.  The antenna is simple, easy to make with commonly available materials, and provides a modest amount of gain.

In this post, Mike Higgins (K6AER) describes the HF version of the J-Pole antenna scaled for both 20 and 40 meters.

He briefly describes how the antenna is designed and built:

"There is nothing special about a J pole, it is an end fed ½ wavelength vertical radiator that needs no radials. Just like its 2-meter brother but on 20 meters it is ten times larger. The bottom ¼ matching section is fed with 50-ohm coax. Bottom of the antenna is shorted and the coax attaches at the 50 ohm point in the matching transformer. The higher the attach point attachment, the higher the feed impedance. The antenna is shorted at DC and thus, P static is never an issue. I ran a nylon line over the top of the tree and the antenna is held vertically by the tree limbs. Leaves seem to have no effect on the radiation at HF. The long side is ¾ wavelength and the matching side is ¼ wavelengths
The 6 inch spreaders are made from ½ inch PVC and spaced about every 2 feet for the parallel matching section. Drill the spreader and feed the wire through the holes on each end. Spreaders are held in place on the wire with good old vinyl electrical tape. The top of the matching section is tied to the radiator with parachute cord to hold up the matching section. Fifty-ohm coax is attached about 8 inches from the bottom with the center conductor connected to the long side and the shield attached to the short matching side. 2:1 VSWR is about 4 % of the Frequency. Also, the antenna can be grounded at the center of the shorting section for a lightning ground.
To tune the antenna just move the attach point up and down for lowest VSWR. Match should be 1.0:1 with ease. I used THHN 14 gage wire to build the antenna. I don’t have $10 into the whole project. The antenna will handle 2KW easily. Mind you if you are running power the voltage at the top will be very high. Try to keep the last 10% in the clear and away from anything conductive."

Mike provides tuning instructions, dimensions, and a diagram for this antenna.  I've built HF J-Pole antennas for 15 meters and 10 meters, and they work very well for DX contacts.

For the latest Amateur Radio news and information, please visit these sites:

http://www.HawaiiARRL.info.
https://oahuarrlnews.wordpress.com.
https://bigislandarrlnews.com.
http://www.arrl.org.
http://www.arrl.org/arrl-audio-news (a weekly podcast updated every Friday afternoon).
https://paper.li/kh6jrm/1430289353 (Amateur Radio News & Information).

Other sites of interest:

https://paper.li/f-1476233615 (Hawaii Science Digest).
https://hawaiiintelligencedigest.com (trends in geopolitical intelligence and cybersecurity).
https://paper.li/f-1482109921 (My Daily Intelligence Briefing).

Be sure to check the blog sidebars for more antenna and propagation articles.

Opinions expressed in this blog are mine unless otherwise stated.

Thanks for joining us today.

Aloha es 73 de Russ (KH6JRM)

Monday, July 24, 2017

Ham Radio Tower Climbing Safety. Post #1199


If you can't view this video, please insert this title URL into your browser search box: https://www.youtube.com/watch?v=as3brjn_-X4.

During my career in commercial broadcasting, I've climbed enough towers to last a lifetime. The fact that I'm still alive to discuss such things is a tribute to my training, the use of certified safety equipment, pre-planning, and plenty of help on the ground.

In this video from Valerie Hotzfeld, we learn how to climb ham radio towers safely. The emphasis of this video is on planning, safety equipment, and adequate ground support.  Don't take shortcuts when you climb towers.  Just take your time and work slowly.

For the latest Amateur Radio news and information, please visit these websites:

http://www.HawaiiARRL.info.
https://oahuarrlnews.wordpress.com.
https://bigislandarrlnews.com.
http://www.arrl.org.
http://www.arrl.org/arrl-audio-news (a weekly podcast updated each Friday afternoon).
https://paper.li/kh6jrm/1430289353 (Amateur Radio News & Information).

Other sites of interest:

https://paper.li/f-1476233615 (Hawaii Science Digest).
https://hawaiiintelligencedigest.com (trends in geopolitical intelligence and cybersecurity).
https://paper.li/f-1482109921 (My Daily Intelligence Briefing).

Be sure to check the blog sidebars for additional antenna and propagation articles.

Opinions expressed in this blog are mine unless otherwise stated.

Thanks for joining us today.

Aloha es 73 de Russ (KH6JRM)

Sunday, July 23, 2017

Amateur Radio Bicycle Mobile setup. Post #1198.


If you can't view this video, please insert this title URL into your browser search box: https://www.youtube.com/watch?v=2zWb-KnkGdY.

Not all mobile operations can be run from your vehicle.  How about mounting a simple 5/8 wavelength Larson VHF magnetic mount antenna on your bicycle and using a HT to contact fellow radio amateurs on 2 meters while you cruise around the neighborhood?  "Taverned" has just done that with a simple 2 meter mobile antenna arrangement on his mountain bike. When you've finished your run, you can park the bike at a public park and operate portable from a bench or picnic table.  A very simple, effective operation--plus you get exercise and some fresh air at the same time.

For the latest Amateur Radio news and information, please visit these sites:

http://www.HawaiiARRL.info.
https://oahuarrlnews.wordpress.com.
https://bigislandarrlnews.com.
http://www.arrl.org.
http://www.arrl.org/arrl-audio-news (a weekly podcast updated on Friday afternoons).
https://paper.li/kh6jrm/1430289353 (Amateur Radio News & Information).

Other sites of interest:

https://paper.li/f-1476233615 (Hawaii Science Digest).
https://hawaiiintelligencedigest.com (trends in geopolitical intelligence and cybersecurity).
https://paper.li/f-1472109921 (My Daily Intelligence Briefing).

Be sure to check the blog sidebars for more antenna and propagation articles.

Opinions expressed in this blog are mine unless otherwise stated.

Thanks for joining us today.

Aloha es 73 de Russ (KH6JRM)

Saturday, July 22, 2017

Solo antenna mast erecting - Ham Radio know how. Post #1197.


If you can't view this video, please enter this title URL into your browser search box: https://www.youtube.com/watch/v=T10k1NIJO2A.

Placing your ham radio antenna atop a mast can really boost your your antenna performance, especially if you're using a small yagi beam. In this video, "ColdMoon" shows how he erected a mast by himself using 3 guy lines and a fiberglass pole.  While this arrangement works, it may be safer to have a friend help you, in case there is a problem.

For the latest Amateur Radio news and information, please visit these websites:

http://www.HawaiiARRL.info.
https://oahuarrlnews.wordpress.com.
https://bigislandarrlnews.com.
http://www.arrl.org.
http://www.arrl.org/arrl-audio-news (a weekly podcast updated every Friday afternoon).
https://paper.li/kh6jrm/1430289353 (Amateur Radio News & Information).

Other sites of interest:

https://paper.li/f-1476233615 (Hawaii Science Digest).
https://hawaiiintellilgencedigest.com (trends in geopolitical intelligence and cybersecurity).
https://paper.li/f-1482109921 (My Daily Intelligence Briefing).

Be sure to check the blog sidebars for more antenna and propagation articles.

Opinions expressed in this blog are mine unless otherwise stated.

Thanks for joining us today.

Aloha es 73 de Russ (KH6JRM)

Friday, July 21, 2017

New Portable Antenna Covers 60m Band. Post #1196.


New Portable Antenna Covers 60m Band
(http://www.sotabeams.co.uk/band-hopper-iii-three-band-linked-dipole).
Accessed on 21July 2017, 20:30 hrs, UTC.
Source:  www.sotabeams.co.uk.
Please click link to read the full article.

Comment:

Now that the 60 meter band (5 kHz) is available in many countries, SOTABeams is now producing a version of its popular Band- Hopper Antennas to include 60 meters.  According to SOTABEAMS, the "Midi-Hopper" is a full-sized antenna that covers 60 meters, 40 meters, and 20 meters.  The antenna includes a balun, feeder, and guying for a 7 meter/22.96-foot telescoping mast. For more information on this new antenna, please contact SOTABEAMS at the URL listed at the top of the article.

For the latest Amateur Radio news and information, please visit these websites:

http://www.HawaiiARRL.info.
https://oahuarrlnews.wordpress.com.
https://bigislandarrlnews.com.
http://www.arrl.org.
http://www.arrl.org/arrl-audio-news (a weekly podcast updated each Friday afternoon).
https://paper.li/kh6jrm/1430289353 (Amateur Radio News & Information).

Other sites of interest:

https://paper.li/f-1476233615 (Hawaii Science Digest).
https://hawaiiintelligencedigest.com (trends in geopolitcal intelligence and cybersecurity).
https://paper.li/f-1482109921 (my Daily Intelligence Briefing).

Be sure to check the blog sidebars for more antenna and propagation articles.

Opinions expressed in this blog are mine unless otherwise stated.

Thanks for joining us today.

Aloha es 73 de Russ (KH6JRM).

Thursday, July 20, 2017

My Isotron 10 Meter Ham Radio Antenna. Post #1195.


If you can't view this video, please insert this title URL into your browser search box: https://www.youtube.com/watch?v=MxskjoxWi1A.

If you want to experiment with an unusual antenna design, try the Isotron 10 Meter Ham Radio Antenna.  In this post from "videosbymike" we see how this antenna is built and what it can do when propagation favors the 10 meter band. Mike unpacked the box, quickly set up the antenna, and made some solid contacts to Santiago, Chile and Puerto Rico from his porch approximately 20-feet/6.097 meters above ground.  The rig used for the antenna test was an old Radio Shack HTX-10 running 25 watts from solar panels.  Isotron also makes antennas for 160, 80, 40, 20, and 15 meters.

For the latest Amateur Radio news and information, please visit these websites:

http://www.HawaiiARRL.info.
https://oahuarrlnews.wordpress.com.
https://bigislandarrlnews.com.
http://www.arrl.org.
http://www.arrl.org/arrl-audio-news (a weekly podcast updated each Friday afternoon).
https://paper.li/kh6jrm/1430289353 (Amateur Radio News & Information).

Other sites of interest:

https://paper.li/f-1476233615 (Hawaii Science Digest).
https://hawaiiintelligencedigest.com (trends in geopolitical intelligence and cybersecurity).
https://paper.li/f-1482109921 (my daily intelligence briefing).

Be sure to check the blog sidebars for more antenna and propagation articles.

Opinions expressed in this blog are mine unless otherwise stated.

Thanks for joining us today.

Aloha es 73 de Russ (KH6JRM)

Wednesday, July 19, 2017

2E0WMG Vertical Antenna Building. Post #1194.


If you can't view this video, please enter this title URL into your browser search box: https://www.youtube.com/watch?v=jiHKFAdu18U.

You don't need a lot of expensive equipment to get your HF rig on the air.  In this video from Kevan (2E0WMG), we see how a few feet/meters of wire, a fiberglass telescoping pole, and a simple ground radial/counterpoise system can provide an easy entry into the HF band of your choice.  The use of an antenna transmatch (i.e. "tuner") will give you some flexibility and better control over the SWR you'll experience on this antenna.  This easy to make vertical antenna can be used at your home or in the field for portable or emergency operations.

For the latest Amateur Radio news and information, please visit these websites:

http://www.HawaiiARRL.info.
https://oahuarrlnews.wordpress.com.
https://bigislandarrlnews.com.
http://www.arrl.org.
http://www.arrl.org/arrl-audio-news (a weekly podcast updated each Friday afternoon).
https://paper.li/kh6jrm/1430289353 (Amateur Radio News & Information).

Other sites of interest:

https://paper.li/f-1476233615 (Hawaii Science Digest).
https://hawaiiintelligencedigest.com (trends in geopolitical intelligence and cybersecurity).
https://paper.li/f-1482109921 (my daily intelligence briefing).

Be sure to check the blog sidebars.  These news feeds are updated daily.

Opinions expressed in this blog are mine unless otherwise stated.

Thanks for joining us today.

Aloha es 73 de Russ (KH6JRM)

Tuesday, July 18, 2017

15M EXTENDED DOUBLE ZEPP ANTENNA BUILD.mp4. Post #1193.


If you can't view this video, please insert this title URL into your browser search box: https://www.youtube.com/watch?v=oIoLbe968Cg.

Here's an antenna project that could get you some additional gain and directivity on the HF band of your choice.  Because of size considerations, BYRONLOCAL decided to design, build, and use a 15 meter extended double zepp antenna for his ham station. The extended double zepp is a collinear array of two 5/8 waves in phase.  This video provides an excellent overview of the theory and construction practices used to build this antenna. Applicable formulas and scale drawings are provided to guide you in the construction of this antenna.

For the latest Amateur Radio news and information, please visit these websites:

http://www.HawaiiARRL.info.
https://oahuarrlnews.wordpress.com.
https://bigislandarrlnews.com.
http://www.arrl.org.
http://www.arrl.org/arrl-audio-news (a weekly podcast updated each Friday).
https://paper.li/kh6jrm/1430289353 (Amateur Radio News & Information).

Be sure to check the blog sidebars for more antenna and propagation articles.

Opinions expressed in this blog are mine unless otherwise stated.

Thanks for joining us today.

Aloha es 73 de Russ (KH6JRM)

Monday, July 17, 2017

QRO Balun 9:1 Unun for Slopper Antenna Long Wire Dipole Field Day Ham Ra...


If you can't view this video, please insert this title URL into your browser search box: https://www.youtube.com/watch?v=OYhhm2cIHiM.

This is post # 1192 in a continuing series of simple ham radio antennas.

The secret to an efficient and safe long wire antenna is a sturdy 9:1 Unun combined with a ground radial/counterpoise system. In this video, Victor Ivanoff describes the 9:1 Unun he used  with a "sloper antenna long wire dipole" during the 2016 ARRL Field Day. You can find more information on this Unun at this website:  http://transverters-store.com.

For the latest Amateur Radio news and information, please visit these websites:

http://www.HawaiiARRL.info.
https://oahuarrlnews.wordpress.com.
https://bigislandarrlnews.com.
http://www.arrl.org.
http://www.arrl.org/arrl-audio-news (a weekly podcast updated each Friday afternoon).
https://paper.li/kh6jrm/1430289353 (Amateur Radio News & Information).

Other sites of interest:

https://paper.li/f-147623615 (Hawaii Science Digest).
https://hawaiiintelligencedigest.com (trends in geopolitial intelligence and cybersecurity).
https://paper.li/f-1482109921 (my daily intelligence briefing).

Be sure to check the blog sidebars for more antenna and propagation articles.

Opinions expressed in this blog are mine unless otherwise stated.

Thanks for joining us today.

Aloha es 73 de Russ (KH6JRM)

Sunday, July 16, 2017

Ultimax Stealth Antenna. Post #1191.


If you can't view this video, please enter this title URL into your browser search box: https://www.youtube.com/watch?v=g-iP4rIcbTk.

Here's an antenna that literally is "for the birds."According to Rich Rodgers, the Ultimax 53-ft/16.158 meter antenna serves a dual purpose of a stealth antenna and a guy wire to support an elevated bird's nest.  Roger says his antenna works on all amateur radio bands from 160 to 6 meters and can handle 2 KW of output power.

For the latest Amateur Radio news and information, please visit these websites:

http://www.HawaiiARRL.info.
https://oahuarrlnews.wordpress.com.
https://bigislandarrlnews.com.
http://www.arrl.org.
http://www.arrl.org/arrl-audio-news (a weekly podcast which is updated each Friday).
https://paper.li/kh6jrm/1430289353 (Amateur Radio News & Information).

Other sites of interest:

https://hawaiiintelligencedigest.com (trends in geopolitical intelligence, strategic forecasting, politics, terrorism, and cybersecurity).
https://paper.li/f-1482109921 (My Daily Intelligence Briefing).
https://paper.li/f-1476233615 (Hawaii Science Digest).

Be sure to check the blog sidebars for more antenna and propagation articles.

Opinions expressed in this blog are mine unless otherwise stated.

Thanks for joining us today.

Aloha es 73 de Russ (KH6JRM)

Saturday, July 15, 2017

Stealthy end fed vertical. Post #1190.


If you can't view the video, please insert this title URL into your browser search box: https://www.youtube.com/watch?v=5GSIJO9r68I.

Don't let HOAs and CC&Rs stop you from enjoying Amateur Radio.  With a bit of imagination, some speaker wire, a 9:1 UNUN balun, and an antenna "tuner", you can get on the air just like KK6FUT does.

KK6FUT uses 14.5 feet/4.42 meters of #22 speaker wire running into a tree in his front yard.  The 9:1 UNUN is based on a design from the Emergency Radio Club of Honolulu (EARC) and does a good job of matching KK6FUT's rig to the relatively short wire antenna.  According to KK6FUT, the best performance can be found on 15 and 10 meters, although contacts can be made on 40, 30, 20, and 17 meters.  You may have to add a few feet/meters to make the antenna more efficient on 40, 30, 20, and 17 meters.  A simple ground radial/counterpoise system will keep rfi out of your shack.  A compromise antenna is better than no antenna.

For the latest Amateur Radio news and information, please visit these websites:

http://www.HawaiiARRL.info.
https://oahuarrlnews.wordpress.com.
https://bigislandarrlnews.com.
http://www.arrl.org.
http://www.arrl.org/arrl-audio-news (a weekly podcast updated each Friday).
https://paper.li/kh6jrm/1430289353 (Amateur Radio News & Information).

Other sites of interest:

https://hawaiiintelligencedigest.com (trends in geopolitical intelligence and cybersecurity).
https://paper.li/f=1482109921 (My daily intelligence briefing).
https://paper.li/f-1476233615 (Hawaii Science Digest).

Be sure to check the blog sidebars for more antenna and propagation articles.

Opinions expressed in this blog are mine unless otherwise stated.

Thanks for joining us today.

Aloha es 73 de Russ (KH6JRM)

Friday, July 14, 2017

Portable HAM Radio Antenna. Post #1189.


If you can't view this video, please insert this title URL into your browser search box: https://www.youtube.com/watch?v=MsrgGy_JhpY.

A portable HF/VHF station doesn't have to be complicated. In this video from USNERDOC (KF7ETX), a few "Long Arm Painter's Poles", some inexpensive wire, an antenna "tuner", a few batteries, and a small HF/VHF transceiver will get you on the air.  This video shows the perfect "antenna weather"-- wet, rainy, and a bit chilly. Despite the poor conditions, KF7ETX easily sets up his station and makes a few contacts. Most of the antenna materials can be found at the nearest home improvement or building supply outlet.

For the latest Amateur Radio news and information, please visit these sites:

http://www.HawaiiARRL.info.
https://oahuarrlnews.wordpress.com.
https://bigislandarrlnews.com.
http://www.arrl.org.
http://www.arrl.org/arrl-audio-news (a weekly podcast updated each Friday).
https://paper.li/kh6jrm/1430289353 (Amateur Radio News & Information).

Other sites of interest:

https://paper.li/f-1476233615 (Hawaii Science Digest).
https://hawaiiintelligencedigest.com (trends in geopolitical intelligence and cybersecurity).
https://paper.li/f-1482109921 (Hawaii Intelligence Daily--my daily intelligence update).

Be sure to check the blog sidebars for more antenna and propagation articles.

Opinions expressed in this blog are mine unless otherwise stated.

Thanks for joining us today.

Aloha es 73 de Russ (KH6JRM)

Thursday, July 13, 2017

Homemade HDTV Antenna ( Awesome! ) Stealth Hawk Antenna. Post #1188.


If you can't view this video, please insert this title URL into your browser search box: https://www.youtube.com/watch?v=YRZPsBMItx0.

Here's a cheap, simple HDTV antenna that will pull in signals from both local and distant stations (up to 50 miles/81 km). There's no need to buy an expensive commercial product if you're willing to spend a few hours designing and building your own HDTV antenna.  The antenna can be scaled to VHF/UHF Amateur Radio frequencies if you desire.  According to the video's author, this antenna was attached to a mast and raised 23-feet/7.01 meters off the ground. He was able to receive 42 local channels in addition to a handful of stations 50 miles/81 km away from his home.  The antenna can be used indoors if necessary to comply with property deed restrictions (HOAs and CC&Rs).  The estimated cost of the antenna using locally available materials was around $12.00. You can find design details at this website:
https://www.digitalhome.ca/forum/showthread.php?t=123803.

For the latest Amateur Radio news and information, please visit these sites:

http://www.HawaiiARRL.info.
https://oahuarrlnews.wordpress.com.
https://bigislandarrlnews.com.
https://paper.li/kh6jrm/1430289353 (Amateur Radio News & Information).
http://www.arrl.org.
http://www.arrl.org/arrl-audio-news (a weekly podcast which is updated each Friday).

Other sites of interest:

Hawaii Science Digest (https://paper.li/f-1476233615).
Hawaii Intelligence Digest (https://hawaiiintelligencedigest.com).
Hawaii Intelligence Daily (https://paper.li/f-1482109921).

Be sure to check the blog sidebars for more antenna and propagation articles.

Opinions expressed in this blog are mine unless otherwise stated.

Thanks for joining us today.

Aloha es 73 de Russ (KH6JRM)

Wednesday, July 12, 2017

Magnetic Loop Great HF Apartment Antenna. Post #1187.


If you can't view this video, please insert this title URL into your browser search box: https://www.youtube.com/watch?v=IuakP-C6NTM.

Here's another magnetic HF loop antenna for those living in deed-restricted housing (HOAs/CC&Rs). Most of the materials used in these loops can be bought at the nearest building supply or home improvement outlet.  The toughest part of the project is the careful bending of the copper pipe used to make the loops. Generally, a nicely done video from the "North Carolina Prepper."  Please note the beautiful ICOM-IC-7000 used for the test.

"North Carolina Prepper" has suggested two websites to help you design, build, and use this magnetic loop antenna:

http://www.nonstopsystems.com/radio/frank_radio_antenna_magloop.htm
http://www.66pacific.com/calculators/small_tx_loop_calc.aspx.

For the latest in Amateur news and information, please visit these sites:

http://www.HawaiiARRL.info.
https://oahuarrlnews.wordpress.com.
https://bigislandarrlnews.com.
http://www.arrl.org.
http://www.arrl.org/arrl-audio-news (a weekly podcast updated each Friday).
https://paper.li/kh6jrm/1430289353 (Amateur Radio News & Information).

Other sites of interest:

https://paper.li/f-147623615 (Hawaii Science Digest).
https://hawaiiintelligencedigest.com (trends in geopolitical intelligence and cybersecurity).
https://paper.li/f-1482109921 (Hawaii Intelligence Daily--A daily intelligence review of the world's top political and intelligence stories).

Be sure to check the blog sidebars for additional antenna and propagation articles.

Opinions expressed in this blog are mine unless otherwise stated.

Thanks for joining me today.

Aloha es 73 de Russ (KH6JRM)

Tuesday, July 11, 2017

160m inverted L. Post #1186.


If you can't view this video, please insert this title URL into your browser search box: https://www.youtube.com/watch?v=oqsfQngkpmM.

Now that 160 meters and other low HF bands (80 meters and 40 meters) are becoming more popular because of the approaching solar minimum, you may want to design, build, and use an antenna specifically dedicated for "The Gentlemen's Band (160 meters)."  Erecting such an antenna, even for a 1/4 wavelength vertical, involves some serious height and space requirements (135 ft/41.15 meters). You can reduce the length and height requirements by building an inverted L antenna for this band, where the wire is partially vertical and partially horizontal.  In this video, Stephen Desmarais has done just that and has managed to squeeze in a 160 meter antenna using his back yard.  Stephen also includes a "tuning box" and a ground radial/counterpoise system to make the antenna more efficient and to reduce rfi in the shack.

For the latest Amateur Radio news and information, please visit these websites:

http://www.HawaiiARRL.info.
https://oahuarrlnews.wordpress.com.
https://bigislandarrlnews.com.
http://www.kh6jrm.info (breaking news for radio amateurs).
http://www.arrl.org.
http://www.arrl.org/arrl-audio-news (a weekly podcast updated every Friday).

Other sites of interest:

http://hawaiisciencedigest.com (science and technology news for radio amateurs).
https://hawaiiintelligencedigest.com (trends in geopolitical intelligence and cybersecurity).
https://paper.li/f-1482109921 (my daily intelligence briefing).

Be sure to check the blog sidebars for more antenna and propagation articles.

Opinions expressed in this blog are mine unless otherwise stated.

Thanks for joining us today.

Aloha es 73 de Russ (KH6JRM)

Monday, July 10, 2017

Ham Radio-80 160 meter magnetic loop transmitting antenna.


If you can't view this video, please insert this title URL into your browser search box: https//www.youtube.com/watch?v=s3oP6VAG3gs.

Here's an intriguing way to get on 160 and 80 meters with a stealthy magnetic loop antenna.  In this video, Kevin Loughin builds, erects, and uses a 6-foot/1.829 meter diameter magnetic loop for 80 and 160 meters.  As Kevin relates, " I create a two-turn loop to get down to 160 and it works quite well. I checked into a local 160 meter net and 4 out of 5 stated they could hear me." The loop is made from copper tubing and uses a 20 pf to 700 pf capacitor with about a 1 mm spacing to tune the antenna.  Kevin says "I've pushed it to 40 watts without an arc."

For the latest Amateur Radio news and information, please visit these websites:

http://www.HawaiiARRL.info.
https://oahuarrlnews.wordpress.com.
https://bigislandarrlnews.com.
http://www.kh6jrm.info (breaking news for radio amateurs).
http://www.arrl.org.
http://www.arrl.org/arrl-audio-news (a weekly podcast which is updated every Friday).

Other sites of interest:

http://hawaiisciencedigest.com (science and technology news for radio amateurs).
https://hawaiiintelligencedigest.com (trends in geopolitical intelligence and cybersecurity).
https://paper.li/f-1482109921 (my daily intelligence briefing).

Be sure to check the blog sidebars for additional antenna and propagation articles.

Opinions expressed in the blog are mine unless otherwise stated.

Thanks for joining us today.

Aloha es 73 de Russ (KH6JRM)

Sunday, July 9, 2017

Super Expedient Stealth 160 Meter Antenna. Post #1184.


If you can't view this video, please insert this title URL into your browser search box: https://www.youtube.com/watch?v=pcnWkbiD79c.

As the sun nears solar minimum, the lower HF bands (160, 80, and 40 meters) are showing their DX potential.  Perhaps it's time to build, erect, and use an antenna dedicated to 160 Meters--the "gentlemen's band."  If you live in a deed-restricted property governed by CC&Rs or HOAs, putting up an outside antenna for any ham radio band can be a challenge, especially if you want to experiment with the 160 Meter Band.  In this video, "Ham Prepper" uses his imagination to erect what he calls a "super expedient stealth 160 Meter Antenna." Thanks to 300 ohm twin lead and a MFJ-989C antenna "tuner", he can work any Amateur Radio HF band from 160 to 10 meters.  Granted, he may only have a NVIS (near vertical incident skywave) antenna, but he'll be able to contact fellow hams up to 300 miles/486 km from his home--just right for entry into local, state, and regional nets or "rag chews."  You make do with what  you have.  A compromised antenna is better than no antenna at all.

For the latest Amateur Radio news and information, please visit these websites:

http://www.HawaiiARRL.info.
https://oahuarrlnews.wordpress.com.
https://bigislandarrlnews.com.
http://www.kh6jrm.info (breaking news for radio amateurs).
http://www.arrl.org.
http://www.arrl.org/arrl-audio-news (a weekly podcast updated each Friday).

Other sites of interest:

http://hawaiisciencedigest.com (science and technology news for radio amateurs).
https://hawaiiintelligencedigest.com (trends in geopolitical intelligence and cybersecurity).
https://paper.li/f-1482109921 (my daily intelligence briefing).

Be sure to check the blog sidebars for more antenna and propagation articles.

Opinions expressed in the blog are mine unless otherwise stated.

Thanks for joining us today.

Aloha es 73 de Russ (KH6JRM)

Saturday, July 8, 2017

HF Mobile Loop Antenna. Post #1183.


If you can't view this video, please insert this title URL into your browser search box: https://www.youtube.com/watch?v=JIvwXNuK7RA.

Here's a fascinating HF mobile loop antenna that can be used in your vehicle, inside your home, or at a portable field operation.  Timothy Drager (W3UE) has done an excellent job of explaining how this unique antenna works and how to assemble, use, and modify the antenna.  Tim claims this mobile HF loop has about 6% efficiency, compared to a "screwdriver" mobile whip antenna which is around 2% efficient.  There appears to be little interaction between the copper pipe loop and the metal roof of his vehicle. An intriguing antenna worth considering.

For the latest Amateur Radio news and information, please visit these websites:

http://www.HawaiiARRL.info.
https://oahuarrlnews.wordpress.com.
https://bigislandarrlnews.com.
http://www.kh6jrm.info ( breaking news for radio amateurs).
http://www.arrl.org.
http://www.arrl.org/arrl-audio-news (a weekly podcast updated each Friday).

Other sites of interest:

http://hawaiisciencedigest.com (science and technology news for radio amateurs).
https://hawaiiintelligencedigest.com (trends in geopolitical intelligence and cybersecurity).
https://paper.li/f-1482109921 (my daily intelligence briefing).

Be sure to check the blog sidebars for more antenna and propagation articles.

Opinions expressed in this blog are mine unless otherwise stated.

Thanks for joining us today.

Aloha es 73 de Russ (KH6JRM)

Friday, July 7, 2017

Building a 6m antenna. Post #1182.


If you can't view this video, please insert this title URL into your browser search box: https://www.youtube.com/watch?v=FBGSvI5Cgn8.

You don't have to spend a lot of money and time building a simple 6 meter dipole antenna.  As "dafrogtoad" points out in his video, a surplus VHF/UHF outdoor television antenna in good shape can provide a good supply of aluminum and other parts for an efficient, inexpensive 6 meter antenna.  You might be able to salvage some more aluminum pieces for a 2 meter or 70 cm antenna after this project is done.  By investing a little time and securing a few pieces of locally available hardware, you can explore "the magic band" at minimum cost.

For the latest Amateur Radio news and information, please visit these websites:

http://www.HawaiiARRL.info.
https://oahuarrlnews.wordpress.com.
https://bigislandarrlnews.com.
http://www.kh6jrm.info (breaking news for radio amateurs).
http://www.arrl.org.
http://www.arrl.org/arrl-audio-news (a weekly podcast updated each Friday).

Other sites of interest:

http://hawaiisciencedigest.com (science and technology news for radio amateurs).
https://hawaiiintelligencedigest.com (latest trends in geopolitical intelligence and cybersecurity).
https://paper.li/f-1482109921 (my daily intelligence briefing).

Be sure to check the blog sidebars for more antenna and propagation articles.

Opinions expressed in this video are mine unless otherwise stated.

Thanks for joining us today.

Aloha es 73 de Russ (KH6JRM)

Thursday, July 6, 2017

My Vertical Loop Antenna for 80 Meters. Post#1181.


If you can't view this video, please insert this title URL into your browser search box: https://www.youtube.com/watch?v=01SePX-NPrw.

Now that propagation is favoring the lower HF bands (160, 80, and 40 meters), you may want to design and build an antenna specifically designed for one of those bands.  In this video, "Lockemeister" chose a full-wavelength vertical loop for 80 meters, getting the best SWR on 3.913 MHz.  He can cover most of the band with his MFJ-Versa II antenna "tuner."  Fortunately, Lockemeister had a sufficiently large yard to contain this antenna.  A full-wavelength loop makes an excellent NVIS (near vertical incident skywave) antenna capable of reaching out to approximately 300 miles/486 km on 80 meters--perfect for working local, state, and regional contacts.  Multiband coverage is possible by feeding the antenna with 450 ohm ladder line, 300 ohm television twin lead, or 600 ohm balanced line in conjunction with a 4:1 balun and an antenna "tuner."

For the latest Amateur Radio news and information, please visit these sites:

http://www.HawaiiARRL.info.
https://oahuarrlnews.wordpress.com.
https://bigislandarrlnews.com.
http://www.kh6jrm.info (breaking news for radio amateurs).
http://www.arrl.org.
http://www.arrl.org/arrl-audio-news (a weekly podcast updated each Friday).

Other sites of interest:

http://hawaiisciencedigest.com (science and technology news for radio amateurs).
https://hawaiiintelligencedigest.com (trends in geopolitical intellligence and cybersecurity).
https://paper.li/f-1482109921 (my daily intelligence briefing).

Be sure to check the blog sidebars for more antenna and propagation articles.

Opinions expressed in this blog are mine unless otherwise stated.

Thanks for joining us today.

Aloha es 73 de Russ (KH6JRM)

Wednesday, July 5, 2017

Amateur Radio Antenna Length Chart VE3ELB.ham-radio.ch. Post #1180.


Amateur Radio Antenna Length Chart VE3ELB ham-radio.ch
(http://ve3elb.ham-radio.ch/antenna%20chart.html).
Accessed on 05 July 2017, 16:00 hrs, UTC).
Author:  VE3ELB.
Please click link to read the full article.

Comment:

I ran across this intriguing chart and its attached antenna information while I was searching for new antenna ideas.  By itself, the antenna length chart is a "keeper", but the additional data supplied by VE3ELB is a wonderful bonus, especially for newly radio amateurs.

VE3ELB's package includes:

A useful Amateur Radio Antenna Length Chart.
Simple Wire Antennas that work (dipole, inverted vee, full wave loop, and a basic ground plane).
The  W5GI multi-band mystery antenna.
Standard Dipole Construction.

You may want to keep this article in your file in case you want to build a simple, effective antenna in a short period of time.

For the latest Amateur Radio news and information, please visit these websites:

http://www.HawaiiARRL.info.
https://oahuarrlnews.wordpress.com.
https://bigislandarrlnews.com.
http://www.kh6jrm.info (breaking news for radio amateurs).
http://www.arrl.org.
http://www.arrl.org/arrl-audio-news (a weekly podcast updated each Friday).

Other sites of interest:

http://hawaiisciencedigest.com (science and technology news for radio amateurs).
https://hawaiiintelligencedigest.com (trends in geopolitical intelligence and cybersecurity).
https://paper.li/f-1482109921 (my daily intelligence briefing).

Be sure to check the blog sidebars for more antenna and propagation articles.

Opinions expressed in this blog are mine unless otherwise stated

Thanks for joining us today.

Aloha es 73 de Russ (KH6JRM)

Tuesday, July 4, 2017

472 kHz-George Smart-M1GEO. Post #1179.


472 kHz-George Smart-M1GEO
(https://www.george-smart.co.uk/radio/472_khz/).
Please click link to read the full article.
Accessed on 04 July 2017, 20:55 hrs, UTC.
Author:  Dr. George Smart (M1GEO).

Comment:

Once the Office of Management and Budget (OMB) approves the FCC's Report & Order for the 630 meter band, radio amateurs in the United States will be able to use frequencies between 472 kHz and 479 kHz, subject to various restrictions on antennas and power. The FCC Report & Order also covers operations in the 2200 meter band (137 kHz).

If you're curious about what the new band means for radio amateurs and the type of equipment needed to get on 630 meters, then this simple tutorial from Dr. George Smart (M1GEO) will help you get started.

The report is divided into four separate pages, each with supporting photos, graphs, reception reports, and other operating data:

472 kHz antennas
472 kHz receive preamp
472 kHz transverter
472 kHz transmitter

Dr. Smart also provides a helpful youtube video discussing individual pieces of hardware needed to get on 630 meters.

I found the tutorial easy to read and fully illustrated with diagrams, schematics, photos, and performance data.

For the latest Amateur Radio news and information, please visit these websites:

http://www.HawaiiARRL.info.
https://oahuarrlnews.wordpress.com.
https://bigislandarrlnews.com.
http://www.kh6jrm.info (breaking news for radio amateurs).
http://www.arrl.org.
http://www.arrl.org/arrl-audio-news (a weekly podcast issued each Friday).

Other sites of interest:

http://hawaiisciencedigest.com (science and technology news for radio amateurs).
https://hawaiiintelligencedigest.com (trends in geopolitical intelligence and cybersecurity).
https://paper.li/f-1482109921.

Be sure to check the blog sidebars for more antenna and propagation articles.

Opinions expressed in this blog are mine unless otherwise stated.

Thanks for joining us today.

Aloha es73 de Russ (KH6JRM)



Monday, July 3, 2017

Five Band Indoor Magnetic Loop Aerial by G4IZH. Post #1178.


Five Band Indoor Magnetic Loop Aerial by G4IZH
(http://qrz.com/five-band-indoor-magnetic-loop-aerial-by-g4izh/).
Accessed on 03 July 2017, 21:50 hrs, UTC.
Author:  G4IZH.
Please click link to read the full article.

Comment:

If you have some basic plumbing tools and some experience in soldering copper pipe, then this homebrew magnetic loop antenna may be what you need to operate in stealth mode without your neighbors or landlord noticing your antenna. According to G4IZH, this sturdy magnetic loop antenna (aerial) covers the 20, 17, 15, 12, and 10 meter bands (14 through 29.7 MHz) and can be made from commonly available materials from the nearest plumbing or building supply store.

G4IZH supplies a complete set of instructions and photos to help you make this near professional quality antenna.

Of course, there are limitations and a few cautions attached to this antenna project:

"The main problem with mag loops is that they are very high Q and need to be re tuned even for a relatively small change in frequency so a motorised tuning capacitor arrangement is most definately required.
The big advantages are that they can be used indoors, are small in size and it is possible to cover quite a few bands with the same loop, they also tend to pick up less locally generated noise.   The loop does have directional properties and can be used in the vertical or horizontal mode."


For the latest Amateur Radio news and information, please visit these websites:

http://www.HawaiiARRL.info.
https://oahuarrlnews.wordpress.com.
https://bigislandarrlnews.com/
http://www.kh6jrm.info (breaking news for radio amateurs).
http://www.arrl.org.
http://www.arrl.org/arrl-audio-news (a weekly podcast updated each Friday).

Other sites of interest:

http://hawaiisciencedigest.com (science and technology news for radio amateurs).
https://hawaiiintelligencedigest.com (trends in geopolitical intelligence and cybersecurity).
https://paper.li/f-1482109921 (my daily intelligence briefing).

Be sure to check the blog sidebars for more antenna and propagation articles.

Opinions expressed in this blog are mine unless otherwise stated.

Thanks for joining us today.

Aloha es 73 de Russ (KH6JRM)