Monday, October 31, 2016

Simple Ham Radio Antennas--20/40 Meter Short Coax Trap Dipole Antenna. Post #938.

20/40 Meter Short Coax Trap Dipole Antenna
(http://www.dxzone.com/cgi/dir/jump2.cgi?ID=32301).
Source:  http://www.dxzone.
Accessed on 01 November 2016, 00:40 hrs, UTC.
Please click link to read the full article.
Comment:

A properly designed and built trap dipole antenna will provide nearly full dipole performance for those living in restricted housing areas.  The total length of this dipole antenna, including the two traps, is only 43.5 feet/13.26 meters--small enough to fit in many urban backyards.

This article is a well-organized tutorial that explains the theory, design, and construction of a 20/40 meter trap dipole antenna, including a list of materials and how to build the traps.  The report contains a simple coax trap design calculator and ample photographs and illustrations.

If you're cramped for space and still want decent dipole performance, then this 20/40 meter trap dipole antenna is for you.
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For the latest Amateur Radio news and events, please visit my two news sites:

http://www.kh6jrm.infor (breaking news of interest to radio amateurs).
https://bigislandarrlnews.wordpress.com (ARRL news and events for Hawaii Island radio amateurs).

For the latest news from the world of science and technology, please visit http://hawaiisciencedigest.com.

Thanks for joining us today!

Aloha es 73 de Russ (KH6JRM).

Sunday, October 30, 2016

Simple Ham Radio Antennas--Comet CHA250B Review. Post #937.

Comet CHA250B Review (http://www.k3dav.com/cometcha250bhfvert.htm).
Author: Dave (K3DAV).
Accessed on 31 October 2016, 02:45 hrs, UTC.
Please click title link or enter post url to read the full article.
Comment:

Although the Comet 250B Vertical antenna is a compromise, it has just enough presence and "punch" to allow those living in restricted housing to get on the air with a decent signal. Sometimes, the only way to go is up.

Dave (K3DAV) has written a positive review of this restricted space antenna, which "is for  the space restricted ham who only uses 100 watts of power out of the back of the radio." Dave explains the theory, construction, and use of this antenna which performs adequately from 80 through 10 meters.  Although the antenna isn't designed to work on 160 meters, Dave has used the Comet 250B to make several contacts on the "gentlemen's band." The addition of ground radials, while not required, will improve overall performance of the antenna.  Other than the main coil, which acts as an impedance transformer, the antenna requires no additional coils for use.  The use of an antenna "tuner" is not required. Dave also lists the results of his testing program and says the CHAB will work very well if power doesn't exceed 100 watts.  Mount the antenna as high as you can to maximize performance.

Despite its shortcomings, the Comet CHA250B will get you on the air with a remarkably small "footprint", something useful in areas where backyard space is limited.  If you can't erect a full half-wave dipole, try this multiband vertical from Comet.
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Be sure to check the blog sidebars for additional antenna and propagation articles.

For amateur radio news and events, please visit http://www.kh6jrm.info (breaking news of interest to the amateur radio community) and http://bigislandarrlnews.wordpress.com (ARRL news and events for Hawaii Island radio amateurs).

Thanks for joining us today!

Aloha es 73 de Russ (KH6JRM).

Saturday, October 29, 2016

Simple Ham Radio Antennas--The All-Band HF Doublet. Post #936.

The All-Band HF Doublet
(http://www.hamuniverse.com/hfdoublet.html).
Accessed on 29 October 2016, 22:50 hrs, UTC.
Author:  N4UJW.
Please click title link or title URL to read the full article.
Comment:

If you need a simple, effective multiband HF antenna for your shack, you should consider building the "All-Band HF Doublet" antenna.  All you need are two vertical supports, some ladder line, tv twinlead, or homemade balanced feed line, some 12-14 gauge house wire, a center insulator, insulators, rope, and an antenna "tuner" with balanced line connectors.  If your "tuner" doesn't have balanced line connectors, you can run the feed into a 4:1 current balun and use a short length of 50 ohm coaxial cable to connect the "tuner" to your HF transceiver.

N4UJW and the Ham University have done an excellent job of explaining the theory, design, construction, and use of this classic antenna. N4UJW gives you all of the basic formulas, wire lengths, feeder lengths, and auxiliary materials you need to build this simple multiband HF antenna.

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

http://www.kh6jrm.info (breaking news of interest for the Amateur Radio community).
http://bigislandarrlnews.wordpress.com (ARRL news and events for Hawaii Island radio amateurs).

For those of you wanting the latest science and technology developments, please visit my science site at http://hawaiisciencedigest.com.

Thanks for joining us today!

Aloha es 73 de Russ (KH6JRM).

Friday, October 28, 2016

Simple Ham Radio Antennas. An ATU aerial tuning unit for short wave HF end fed aerials


If you're having trouble viewing this video, please insert this title link into your browser search box; https://www.youtube.com/watch?v=043sAF4HuJs. This is post #935 in a continuing series of articles on simple ham radio antennas.  Here's another great video tutorial from Ray of the "Radio Workshop." Ray uses a simple, easily understood style to help us build an antenna tuning unit (ATU) for use with end fed antennas, including the popular inverted L antenna. Ray shows us how to assemble a L-match ATU which is simple and inexpensive to build and use.  This is a good, basic introduction to the design and use of "long wire" antennas.

For the latest amateur radio news and information, please visit my two news sites:

http://www.kh6jrm.info (for breaking news of interest to radio amateurs).
http://bigislandarrlnews.wordpress.com (ARRL news and information for Hawaii Island radio amateurs).

Be sure to check out 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).

Thursday, October 27, 2016

Simple Ham Radio Antennas--Diy Longwire antenna for DX up to 40 MHz or more homemade HD


If you're unable to view this video, please insert this title link into your browser search box: https://www.youtube.com/watch?v=J7tpMGigvfw.  The key to this high performing longwire receiving antenna is this homemade 9:1 balun. Similar baluns wound for 4:1 and even 1:1 can be used to improve reception of SW and medium wave signals.  The antenna can be modified for transmitting as well. Be sure to use a good ground radial or "counterpoise" system to improve efficiency of this antenna.  An excellent tutorial from Sergio Tech.

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

http://www.kh6jrm.infor (breaking news of interest to the Amateur Radio Community).
http://bigislandarrlnews.wordpress.com (ARRL news and events for Hawaii Island radio amateurs).

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

Thanks for joining us today!

Aloha es 73 de Russ (KH6JRM).

Wednesday, October 26, 2016

Simple Ham Radio Antennas--Portable Vertical Antennas. Post #933.


If you're having trouble viewing this video, please insert this title link into your browser search box: https://www.youtube.com/watch?v=Or8_0OOJ-mo.  Here's another simple vertical antenna that is cheap, portable, and made from locally available materials. According to Brent (VK2MEV), all you need for this 20 meter/15 meter dual band antenna is a 10 meter/32.8 ft telescoping fiberglass "squid" fishing pole, a quarter wavelength wire for 20 meters, a "tuner", balun, and 3 elevated quarter wave length radials tied off with some rope and tent stakes. The antenna is collapsible and fits into a backpack, making it ideal for portable or emergency operations.  This antenna would also make a good temporary antenna for  your QTH.

For the latest breaking news of interest to radio amateurs, please visit my two websites:  http://www.kh6jrm.info (breaking news) and https://bigislandarrlnews.wordpress.com (ARRL news and events for Hawaii Island radio amateurs).

Opinions expressed in this blog are mine unless otherwise stated.

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

Thanks for joining us today!

Aloha es 73 de Russ (KH6JRM).


Tuesday, October 25, 2016

Simple Ham Radio Antennas--How to Build a 9:1 UnUn for Ham Radio Antenna. Post #932.


If you're having trouble viewing this video, please insert this title link into your browser search box: https://www.youtube.com/watch?v=mfnqQeDLoQ.  An end-fed long wire  coupled to a 9:1 balun and a decent "counterpoise" or ground radial system makes an excellent portable or home-based antenna.  In this video from "Tinker John" (W5CYF), we learn how to build an easy, inexpensive, and lightweight 9:1 UnUn for a long wire antenna. By following the steps shown in this video, you'll have a durable 9:1 UnUn in only a few hours.  This would make an excellent weekend project.

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

http://www.kh6jrm.info (breaking news of interest to the Amateur Radio Community).

https://bigislandarrlnews.wordpress.com (ARRL news and events for Hawaii Island radio amateurs).

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

Opinions expressed in this blog are mine unless otherwise stated.

Aloha es 73 de Russ (KH6JRM). 

Monday, October 24, 2016

Simple Ham Radio Antennas--End Fed Antenna Install and QSO. Post #931.


If you're having trouble viewing this video, please insert this title link into your browser search box: https://www.youtube.com/watch?v=9hIT_Z-y-D0.  Nicely produced video from "CoquiSats" on how to install and use the "Hy End Fed 100 watt classic for 10-15-20-40 meter ham bands."  This antenna is produced in the Netherlands and requires two poles for effortless operation.  This end fed antenna requires no "tuner", ground radial system, or "counterpoise" wires.  Most of the matching work is done by what I assume to be a 9:1 balun at the lower end of the 1/2 wavelength antenna.  A decent antenna for those with limited space.

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

http://www.kh6jrm.info (breaking news).

https://bigislandarrlnews.wordpress.com (ARRL news and events for Hawaii Island radio amateurs).

You also may interested in my science and technology site:

http://hawaiisciencedigest.com.

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

Until next time,

Aloha es 73 de Russ (KH6JRM)

SIMPLE HAM RADIO ANTENNAS.

Sunday, October 23, 2016

Simple Ham Radio Antennas--Antenna Information for Emergency Communications


If you're having trouble viewing this video, please insert this title link into your browser search box: https://www.youtube.com/watch?v=nNXvuv83ZNc. This is post #930 in a continuing series of Simple Ham Radio Antennas. "Commsprepper" has offered a helpful, handy, and informative guide to the major frequency bands and users in the VHF and UHF bands.  Keep a copy of this guide near your rig for reference.  You can make your own chart as well by using the simple 1/2 wavelength antenna formulas given in the chart. The first formula is for the length in meters.  The second formula is for the length in feet.

For the latest Amateur Radio news and information, please visit my two news blogs:

http://www.kh6jrm.info (breaking news of interest to the Amateur Radio community).

http://bigislandarrlnews.wordpress.com (ARRL news and events for Hawaii Island radio amateurs).

Thanks for joining me today!

Aloha es 73 de Russ (KH6JRM).

Saturday, October 22, 2016

Simple Ham Radio Antennas--Ladder Line. Post #929.

Ladder Line
(http://kv5r.com/ham-radio/ladder-line/).
Accessed on 22 October 2016, 20:25 hrs, UTC.
Author:  Harold Milton (KV5R).
Please click title link or insert title URL into your browser search box to read the full article.

Comment:

Harold Milton (KV5R) has written an excellent article on the benefits of using ladder line to feed multiband HF antennas.  If you can erect only one antenna that must cover several amateur radio bands, then this well-crafted essay is for you.

Harold breaks his tutorial into several easily-understood parts:

Why use ladder line?
Antenna mythology (efficiency, swr, line loss, coax vs ladder line).
Tuner and Balun loss myths.
Ladder Line myths.
Preferred wire for making ladder line.
How to make your own ladder line.
Spacing and impedance.
Preferred ladder line lengths.
Feed through options.
Lightning protection.

This article is a basic antenna reference document that belongs in your reference library.

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

http://www.kh6jrm.info (breaking news of interest to the Amateur Radio Community).

http://bigislandarrlnews.wordpress.com (ARRL news for Hawaii Island radio amateurs).

Thanks for joining us today!

Aloha es 73 de Russ (KH6JRM).

Friday, October 21, 2016

simple Ham Radio Antennas--End-Fed Wire Antennas. Post #928.


If you're having trouble viewing this video, please insert this title link into your browser search box: https://www.youtube.com/watch?v=264kI-xyxXE.  End-fed antennas are simple, cheap, and adaptable for both home and portable operations. In this video, Stan Gibilisco (W1GV) explains the theory, design, operation, and limitations of this versatile HF antenna.  In most cases, end-fed wire antennas need an antenna transmatch (i.e. "tuner") and a good rf ground such as a ground radial or counterpoise system.  With proper design, an end-fed wire can serve as an effective multiband antenna.

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

http://www.kh6jrm.info (breaking news of interest to the Amateur Radio Community).

https://bigislandarrlnews.wordpress.com (ARRL news for Hawaii radio amateurs).

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

Thanks for joining us today!

Aloha es 73 de Russ (KH6JRM).

Thursday, October 20, 2016

Simple Ham Radio Antennas--Roll Up Slim Jim Antenna for Emergency & Preparedness Communication Review


If you're having trouble viewing this video, please insert this title link into your browser search box: https://www.youtube.com/watch?v=196-sS2yYak. This is post #927 in a continuing series of articles on simple ham radio antennas.  Here is a simple, portable "Slim Jim" antenna for the 2m and 70cm amateur radio bands. W2NTC reviews this effective, efficient VHF/UHF antenna from Nelson Antennas and shows how it can be deployed both indoors and outdoors.  You should keep one of these antennas in your vehicle or ham shack for portable or emergency use.  Those living in HOA or CC&R-controlled housing will find this antenna useful, unobtrusive, and "stealthy."

For the latest Amateur Radio news and information, please check out my two news websites:

http://www.kh6jrm.info (breaking amateur radio news).
http://bigislandarrlnews.wordpress.com (amateur radio news for radio amateurs living on Hawaii Island).

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, October 19, 2016

Simple Ham Radio Antennas--Portable Field Antenna Project. Post #926.


If you're having trouble viewing this video, please insert this title link into your browser search box: https://www.youtube.com/watch?v=VXo0XucRpt0.  Here's another simple, "no solder-assembly-required" portable/emergency HF vertical antenna fed with homebrewed feed line.  NG9D calls his creation a "3-band lambda antenna", because its shape resembles the Greek letter "lambda."  The antenna covers the 20 meter, 30 meter, and 40 meter amateur radio bands and requires an ATU (automatic tuning unit) and small counterpoise to attain decent efficiency.  The vertical element is 34-feet/10.36 meters long, while the "counterpoise" wire is 17-feet/4.57 meters long.  The video does a good job of explaining the theory and general operating techniques behind this remarkably simple, easily-made antenna.

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

http://www.kh6jrm.info (breaking news of interest to the Amateur Radio community).

https://bigislandarrlnews.wordpress.com (an arrl news site for Hawaii Island radio amateurs).

Opinions expressed in this blog are mine unless otherwise stated.

Thanks for joining us today!

Aloha es 73 de Russ (KH6JRM).

Tuesday, October 18, 2016

Simple Ham Radio Antennas--Quick Install of a UHF Connector. Post #925.


If you're having trouble viewing this video, please insert this title link into your browser search box: https://www.youtube.com/watch?v=A9fv-UY-Msc.  If you need a quick, simple, and effective way to attach a UHF connector to LMR-400 coaxial cable with a minimum of soldering, then this video by Drew Brashler is what you need.  I've always used the full soldering method to insure a good, clean, solid connection, but this method may prove useful in an emergency if you only have a low-powered soldering tool available.

For the latest Amateur Radio news and information, please visit my news site at http://www.kh6jrm.info.

Hawaii Island radio amateurs are invited to visit my ARRL news site at http://bigislandarrlnews.wordpress.com.

Opinions expressed in this blog are mine unless otherwise stated.

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

Thanks for joining us today!

Aloha es 73 de Russ (KH6JRM).

Monday, October 17, 2016

Simple Ham Radio Antennas--W4EDF Portable Dipole Antenna Center Support. Post #924.


If you're having trouble viewing this video, please insert this title link into your browser search box: https://www.youtube.com/watch?v=Z-cUNs274rU. Concise, simple, and clear explanation by Ed (W4EDF) on how to make a do-it-yourself Dipole Antenna Platform.  This easily-made dipole antenna center support will be useful for a variety of emergency, portable, and even QTH-based radio operations.

For the latest Amateur Radio news and information, please visit my news site at http://www.kh6jrm.info.

Hawaii Island radio amateurs are encouraged to visit my ARRL news site at http://bigislandarrlnews.wordpress.com

Be sure to check out 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, October 16, 2016

Simple Ham Radio Antennas--Portable HF With Four Antenna Review Mojave Desert, CA


If you're unable to view this video, please insert this title link into your browser search box: https://www.youtube.com/watch?v=fCPEP2HsShy. This is post #923 in a continuing series on Simple Ham Radio Antennas. Interesting antenna test video from "VideosByDFP."  This field test involved the following antennas:
Alpha Loop, Sr; Alpha vertical; Alpha Modo; and the Alpha EZ Military.  Rigs used in the test included the Icom IC-720D with the LDG-IT-100 Autotuner and the Yaesu FT-857D with the LDG YT-100 Autotuner.  The antenna tests were conducted between 15 October and 18 October 2015 in the upper Mojave Desert, about 120 miles/189 km north of Los Angeles, California.  Intriguing video that may give you some ideas about your next portable/emergency antenna.

For the latest Amateur Radio News and Information, please visit http://www.kh6jrm.info.
For ARRL news applicable to Hawaii radio amateurs, please visit http://bigislandarrlnews.wordpress.com.

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

Thanks for joining us today!

Aloha es 73 de Russ (KH6JRM).

Saturday, October 15, 2016

Simple Ham Radio Antennas--Antenna Basics. Post #922

Antenna Basics
(http://213.114.137.49/antennas/anten.htm).
(http://www.dxzone.com/cgi-bin/jump2.cgi?ID=5408).
Accessed on 15 October 2016, 21:40 hrs, UTC.
Author:  Harry Lythall (SM0VPO).
Please insert either of these two title URL links into your browser search box to read the full article.
Comment:

A concise, well-written antenna tutorial from Harry Lythall (SM0VPO). Harry does an excellent job of explaining the theory and design of basic dipole and vertical HF antennas.

The article explores the following questions:

What is wavelength?
How long should antennas be?
How does an antenna work?
How does a 1/4 wavelength antenna work?
How do I connect a 1/4 wavelength antenna to a transmitter?
How do I know if an antenna is useless?

A very good introduction to antennas for the newly-licensed radio amateur.

For the latest Amateur Radio News and Information, please visit my two news sites:

http://www.kh6jrm.info (for breaking news of the Amateur Radio community).
http://bigislandarrlnews.wordpress.com (ARRL news and information for Hawaii Island radio amateurs).

Be sure to check out 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).

Friday, October 14, 2016

Simple Ham Radio Antennas--Ham radio-the simple and effective antenna on 20 meters for field work.


If you're unable to view this video, please insert this title link into your browser search box: https://www.youtube.com/watch?v=q4U6KTA55T0. This is post #921 in a continuing series of articles on simple ham radio antennas.  This is a nicely-done video tutorial from Alex Razorschchuk (UX5UU) on how to build a simple, effective 20 meter vertical antenna for portable or emergency use.  All you need is a sturdy tripod, a telescoping fiberglass fishing pole (6.3 meters/20.66 feet long), 2 wires measuring 5.2 meters/17.56 feet long, a convenient length of RG-58 coaxial cable, and an antenna analyzer to trim for the lowest SWR.  Alex also provides SWR curves and other performance tests for his easily made antenna.  This antenna would make a good weekend project.

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

http://www.kh6jrm.info
http://bigislandarrlnews.wordpress.com.

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

Opinions expressed in the blog are mine unless otherwise stated.

Thanks for joining us today!

Aloha es 73 de Russ (KH6JRM).

Thursday, October 13, 2016

Simple Ham Radio Antennas--Basic Wire Antennas, Part 1. Post #920

Basic Wire Antennas Part 1.
(http://www.dxzone.com/qsy31767-basic-wire-antennas-part-i).
Author:  Marc C. Tarplee, PhD (N4UFP).
Accessed on 13 October 2016, 19:20 hrs, UTC.
Please click link to read the article.
Comment:

An excellent antenna tutorial from Marc C. Tarplee (N4UFP).  In part 1 of his continuing antenna series, Tarplee explores the theory, construction, and operation of several popular wire antennas, including the dipole, half wave, full wave, double zepp, off-center fed dipole, and the G5RV.

The explanations are clear, concise, and well-organized.  If you need an antenna refresher or a basic reference document, then this article is for you.

For the latest Amateur Radio news and information, please visit my news site at http://www.kh6jrm.info.

Opinions expressed in this blog are mine unless otherwise stated.

Thanks for joining us today!

Aloha es 73 de Russ (KH6JRM).

Tuesday, October 11, 2016

Simple Ham Radio Antennas--QRP DIY manual tuner kit 1-30 MHz build. Post #919.


If you're having trouble viewing this video, please insert this title link into your browser search box: https://www.youtube.com/watch?=R7hMoshqRPw. Excellent video tutorial from "Alex's Tech Videos" on how to assemble the "QRP manual days Antenna tuner kit 1-30 MHz for HAM RADIO".  The kit is from China and is offered on eBay from several distributors.  The video is easy to follow and should help you assemble this useful kit.  The video takes you-step-by-step through the entire unpacking, assembly, and use procedure.

For the latest Amateur Radio news and information, please visit my news site at http://www.kh6jrm.info.

Opinions expressed on this blog are mine unless otherwise stated.

Thanks for joining us today!

Aloha es 73 de Russ (KH6JRM).

Monday, October 10, 2016

Simple Ham Radio Antennas--Ladder Line and SWR.Post #918.


If you're having trouble viewing this video, please insert this title link into your browser search box: https://www.youtube.com/watch?=1KUJPcIUDE.  A good, basic introduction to the theory, design, construction, and use of feed lines made from ladder line.  Ladder line, used in conjunction with a balanced "tuner" or a 4:1 current balun/"tuner" combination, can turn a simple dipole antenna into a multiband dipole.  Stan (W1GV) does an excellent job of explaining how balanced feed lines work.

For the latest Amateur Radio news and information, please visit my news site at http://www.kh6jrm.info.

Opinions expressed in this blog are mine unless otherwise stated.

Thanks for joining us today!

Aloha es 73 de Russ (KH6JRM).

Saturday, October 8, 2016

Simple Ham Radio Antennas--2m Ladder Line J Pole. Post #917.

https://
If you're not able to view the video, please insert this title link into your browser search box: https://www.youtube.com/watch?v=n0eYB5AWGvY. In this video from KD0RVY, we learn how to assemble and use a simple 2m J-Pole made from 450 ohm ladder line.  This antenna is suitable for a variety of operations, including portable, emergency, and home use.  Although KD0RVY calls his creation a J-Pole, it may be more accurate to call this antenna a "slim jim".  J-Poles are usually bridged at the bottom of the antenna.  In this antenna, the bridge is at the top.  But that's only a minor quibble.  I've built a few of these antennas for 2 meters and they work remarkably well.  Keep one of these antennas in your "Go Kit."

For the latest Amateur Radio news and information, please visit my news site at http://www.kh6jrm.info.

Hawaii hams can visit my Big Island ARRL News site at http://bigislandarrlnews.wordpress.com.

Opinions expressed in this blog are mine unless otherwise stated.

Thanks for joining us today!

Aloha es 73 de Russ (KH6JRM).

Friday, October 7, 2016

Simple Ham Radio Antennas--Deployment Of The Alpha Multiband Antenna And Heavy Duty Tripod 6-23-2016


If you're having trouble viewing this video, please enter this title link into your browser search box: https://www.youtube.com/watch?v=FAoK32BL4MQ.  If you need a strong, easily-assembled, and compact portable or emergency antenna, then the new Alpha Multiband Vertical Antenna may be what you're looking for.  In this video from "videosbymike", we see how easy it is to unpack, assemble, and use this antenna in a portable operation.  In this case, mike sets up his portable operation at the New Smyrna Beach in Florida and gets some interesting contacts using his Yaesu FT-857D and the LDG YT-100 auto tuner. The antenna comes with a tripod, a field bag, an aluminum MIL-SPEC mast, mast sections, a jaws mount, active wire, elements, and a counterpoise.

This is post #916 in a continuing series on Simple Ham Radio Antennas.

For the latest Amateur Radio news and information, please visit my news site at http://www.kh6jrm.info.

Hawaii hams are invited to visit my local arrl news site at http://bigislandarrlnews.wordpress.com.

Be sure to check out 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, October 6, 2016

Simple Ham Radio Antennas--Building Ladder Line by N4LQ. Post #915.


If you're having trouble viewing this video, please insert this title link into your browser search box: https://www.youtube.com/watch?v=qzFJ=KGB6qkXs. Making your own ladder line to feed your antennas is easy if you follow Steve Ellington's (N4LQ) step-by-step video.  Most of the wire and ties can be bought at your neighborhood hardware store or building supply outlet. You can use your home made ladder line and a balanced antenna transmatch (i.e. "tuner") to turn your dipole into a multi-band antenna.  You can also use a 4:1 current balun to connect your ladder line to your regular "tuner".  Be sure to spray all connections with a UV-resistant paint.

For the latest Amateur Radio news and information, please visit my news site at http://www.kh6jrm.info.

Hawaii hams are also invited to check into my Hawaii ARRL News site at http://bigislandarrlnews.wordpress.com.

Opinions expressed in this blog are mine unless otherwise stated.

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

Aloha es 73 de Russ (KH6JRM).

Wednesday, October 5, 2016

Simple Ham Radio Antennas--A Simple Wire Tuner. Post #914.


If you're having trouble viewing this video, please insert this title link into your browser search box: https://www.youtube.com/watch?v=6QwBiz_LB9M. Here's a simple, basic, but effective antenna transmatch or "tuner" for feeding random wires, especially half-wave end-fed antennas. Stan Gibilisco (W1GV) does an excellent job of explaining the theory, design, construction, and use of this simple device that will match the impedance of a long or random wire antenna to the impedance of your HF transceiver.  Be sure to use a good ground radial system with this type of antenna.

For the latest Amateur Radio news and information, please visit my news website at http://www.kh6jrm.info.

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

Opinions expressed in this blog are mine unless otherwise stated.

Thanks for joining us today!

Aloha es 73 de Russ (KH6JRM).

Monday, October 3, 2016

Simple Ham Radio Antennas--Rat Tails and Counterpoise adapters for VHF Rubber Duck Antennas


If you're having trouble viewing this video, please insert this title link into your browser search box: https://www.youtube.com/watch?v=3-JqK7w_1d8.  This is post #913 in a continuing series of simple ham radio antennas.  Improving the performance of your VHF/UHF HT may be as simple as attaching a "rat tail" quarter wave length wire to the base of your HT's "Rubber Duck" antenna.  The extra wire supplies the missing half of the HT's antenna.  The slightly modified antenna now becomes a VHF/UHF dipole antenna with significant gain over the highly compromised "Rubber Duck" antenna.  This video clearly explains the process of making a "Rat Tail" antenna extension for your HT.  The "Rat Tail" is simple, inexpensive, and efficient.

For the latest Amateur Radio news and information, please visit my news site at http://www.kh6jrm.info.

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Opinions expressed in this blog are mine unless otherwise stated.

Thanks for joining us today!

Aloha es 73 de Russ (KH6JRM).

Sunday, October 2, 2016

Simple Ham Radio Antennas--Dual Magnetic Loop antenna 80m to 17m continuous


If you're having trouble viewing this video, please insert this title link into your browser search box: https://www.youtube.com/watch?v=OuaTCZG2EBs. Here's another interesting magnetic loop antenna that is a bit more complicated than other magnetic loop antenna videos online.  According to Rob (dx2hunt), this dual magnetic loop antennas covers amateur radio frequencies between 80m and 17m continuously.  The 3/4-inch (19 mm) copper loops are arranged in a parallel fashion and are separated by 2.5 to 3 diameters of the copper tubes.  The most expensive part of the antenna is the vacuum variable capacitor which has a range of 25 to 1,000 pF with a 7,500 volt rating.  Rob says he has made some good contacts between Australia and New Zealand with this dual loop magnetic antenna.  If you've got the time, you may want to build one of these intriguing antennas.

For the latest Amateur Radio news and information, please visit my news site at: http://www.kh6jrm.info.

Radio amateurs living in the Pacific or Hawaii areas may want to visit my ARRL site at:  http://bigislandarrlnews.wordpress.com.

Opinions expressed in this blog are mine unless otherwise stated.

Thanks for joining us today!

Aloha es 73 de Russ (KH6JRM).

Saturday, October 1, 2016

Simple Ham Radio Antennas--40 Meter Inverted V Antenna - Build, Tune & Test! Post #911


If you're having trouble viewing this video, please insert this title link into your browser search box: https://www.youtube.com/watch?v=7za6gPWcNng.  The basic inverted V antenna is an incredibly easy to make and use antenna that will give your hours of radio pleasure.  In this video, Dave Tadlock (KG0ZZ) provides a detailed explanation and demonstration of how to design, build, erect, and use a 40 meter inverted v antenna.  His explanation is clear, concise, and detailed. Follow Dave's instructions, and you'll have little difficulty in building this versatile HF antenna.  Multiband use can be obtained if you feed the antenna with 300 ohm television twin lead, 450 ohm ladder line, or homemade balanced line.  To use these feed lines, you'll need a balanced antenna transmatch (i.e. "tuner") or a 4:1 current balun attached to your regular "tuner."  You can use any good quality 50 ohm coaxial cable to feed the 40 meter version of this antenna. You can use this antenna on 15 meters as well with some increase in SWR.  If you design the 40 meter inverted vee to be used in the cw portion of the band, it will work reasonably well on the third harmonic in the ssb portion of the 15 meter band.

For the latest Amateur Radio news and information, please visit my news site at http://www.kh6jrm.info.

I also maintain a website for Hawaii-based radio amateurs at http://bigislandarrlnews.wordpress.com.

Opinions expressed in this blog are mine unless otherwise stated.

Thanks for joining us today!

Aloha es 73 de Russ (KH6JRM).