Tuesday, November 13, 2018

Building a Doublet Aerial-Antenna. Post 1677.


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

I've always enjoyed "classic" antennas for their simplicity, efficiency, and low cost.  One of my favorites is the HF Doublet, which can be designed to cover all amateur radio frequencies between 3.500 MHz (80 meters) and 29.000 MHz (10 meters). 

In this enjoyable and detailed presentation, Adrian documents his construction of a doublet HF antenna from start to finish.  By using an antenna transmatch (i.e. "tuner"), a 1:4 current balun, and twin feeders (ladder line, tv window line, or homebrewed 600 ohm feed line), you can use Adrian's creation to cover several amateur HF radio bands--all this with one antenna.  Give this "old timer" antenna a try--you won't be disappointed.

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

http://www.HawaiiARRL.info.
http://www.arrl.org.
http://www.arrl.org/arrl-audio-news (a weekly podcast which is updated each Friday afternoon).
https://oahuarrlnews.wordpress.com.
https://hamradiohawaii.wordpress.com.
https://bigislandarrlnews.com.
https://www.eham.net.
http://www.southgatearc.org.

Thanks for joining us today.

Aloha es73 de Russ (KH6JRM).

Monday, November 12, 2018

How To Tune a 10 Meter Dipole. Post #1676.


If you can't view the video, please insert this title URL into your browser search box: https://www.youtube.com/watch?v=Ogxp3yjAzCs&index=110&list=PLKKNqDVcbnzV-vN-gtGhODMTAkmnUDBX0&t=0s.

Randy Hall (K7AGE) does an excellent job of describing how to "tune" a 10 meter dipole antenna. Although the video will prove most useful for newly licensed radio amateurs, the information will serve as a general review for all hams who wish to design, build, and use simple dipole antennas.  The length of this dipole is 468/frequency in MHz.  The antenna is cut for 28.3 MHz and measures 16.5 feet/5.03 meters long.  Randy shows us how to use a MFJ Antenna Analyzer to trim the antenna to resonance.  The procedure outlined by Randy can be used for any HF band from 160 meters to 10 meters.

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

http://www.HawaiiARRL.info.
http://www.arrl.org.
http://www.arrl.org/arrl-audio-news (a weekly podcast which is updated each Friday afternoon).
https://oahuarrlnews.wordpress.com.
https://hamradiohawaii.wordpress.com.
https://bigislandarrlnews.com.
https://www.eham.net.
http://www.southgatearc.org.

Thanks for joining us today.

Aloha es 73 de Russ (KH6JRM).

Sunday, November 11, 2018

My favourite magnetic loop for HF Pedestrian Mobile. Post 1675.


If you can't view the video, please insert this title URL into your browser search box: https://www.youtube.com/watch?v=YswnVmAKSP0.

Australian radio amateur Peter Parker (VK3YE) enjoys experimenting with antennas.  He especially likes to design antennas for portable operations, including what he calls "Pedestrian Mobile." 

In this video, Peter compares two magnetic loop antennas for the "Pedestrian Mobile" situation--one being made from copper tubing and the other fashioned from aluminum tubing.  According to Peter, both magnetic loop antennas performed well on the 40 meter Amateur Radio Band, with contacts ranging between 300 and 1500 kilometers. 

You can find more magnetic loop antennas on his website at vk3ye.com.

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

http://www.HawaiiARRL.info.
http://www.arrl.org.
https://www.arrl.org/arrl-audio-news (a weekly podcast which is updated each Friday afternoon).
https://oahuarrlnews.wordpress.com.
https://hamradiohawaii.wordpress.com.
https://bigislandarrlnews.com.
https://www.eham.net.
http://www.southgatearc.org.

Thanks for joining us today.

Aloha es 73 de Russ (KH6JRM)

Saturday, November 10, 2018

How to build the ZS6BKW multiband HF antenna. Post #1674.


If you can't view the video, please insert this title URL into your browser search box: https://www.youtube.com/watch?v=BfUbL_4VCww.

If you're a fan of the classic G5RV antenna designed by the late Louis Varney (G5RV), you may find this video from the Stamford Amateur Radio Association (W1EE) most fascinating.

The team in this video discusses how to design, build, and use an improved variant of Varney's original antenna known as the ZS6BKW.  This antenna was developed by Brian Austin (formerly ZS6BKW, now G0GSF).  In the early 1980s, Austin created computer programs used in conjunction with Smith Charts to calculate optimum dimensions for the classic G5RV.

This video uses those calculations to design and build a ZS6BKW antenna from scratch.  The video discusses the G5RV, the ZS6BKW, tuning suggestions, and mounting options.  An interesting examination of a classic antenna and its modern persona.

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

http://www.HawaiiARRL.info.
http://www.arrl.org.
http://www.arrl.org/arrl-audio-news (a weekly podcast which is updated each Friday afternoon).
https://oahuarrlnews.wordpress.com.
https://hamradiohawaii.wordpress.com.
https://bigislandarrlnews.com.
https://www.eham.net.
http://www.southgatearc.org.

Thanks for joining us today.

Aloha es 73 de Russ (KH6JRM).



Friday, November 9, 2018

Installation of an N9SAB OCF Antenna. Post #1673.


If you can't view the video, please insert this title URL into your browser search box: https://www.youtube.com/watch?v=PF0mBpfwa0A.

If you have limited space to install a multiband dipole antenna on your property, you may find this video by Tom (W7TCT) interesting.  In this video, Tom shows us his multiband Off-Center-Fed (OCF) dipole antenna which fits into his limited suburban lot.  He also offers a few suggestions for those wanting to try this dipole antenna variant.  Why not build one and see what results you can gain from Tom's model.  Most of the antenna materials can be found in your junk box or at the nearest home improvement/building supply outlet. 

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

http://www.HawaiiARRL.info.
http://www.arrl.org.
http://www.arrl.org/arrl-audio-news
https://oahuarrlnews.wordpress.com
https://hamradiohawaii.wordpress.com
https://bigislandarrlnews.com
https://www.eham.net
http://www.southgatearc.org

Thanks for joining us today.

Aloha es 73 de Russ (KH6JRM).

Thursday, November 8, 2018

HF Pack Pedestrian Mobile with Super Antenna MP1. Post 1672.


If you can't view the video, please insert this title URL into your browser search box: https://www.youtube.com/watch?v=W5aEhzEz-1k.

Australian radio amateur Peter Parker (VK3YE) has inspired many of us to try pedestrian mobile operations.  In this video from VA3OSO and VE3EPQ, we move from Peter's balmy Australian beaches and trails to the much colder climes of Canada to see how two hams cope with the weather as they talk around the world with a pedestrian mobile setup.  Other than monitoring the weather, preparing for the chill factor, and the being mindful of the trailing mobile counterpoise, these radio amateurs appear to have enjoyed the experience of working pedestrian mobile contacts.  Nicely done video which may inspire you to take  your portable HF transceiver on the trail--hopefully when the weather is a bit more forgiving.

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

http://www.HawaiiARRL.info.
http://www.arrl.org.
http://www.arrl.org/arrl-audio-news (a weekly podcast which is updated each Friday afternoon).
https://oahuarrlnews.wordpress.com.
https://hamradiohawaii.wordpress.com.
https://bigislandarrlnews.com.
https://www.eham.net.
http://www.southgatearc.org.

Thanks for joining us today.

Aloha es 73 de Russ (KH6JRM).

Wednesday, November 7, 2018

Dipole and Inverted V Antenna Basics. Post #1671.


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

Dave Tadlock (KG0ZZ) has put together an excellent, informative video discussing the theory, design, construction, and operation of basic dipole and inverted v antennas. These classic designs are easily modified for your operational needs and can be built from locally available materials.  The video includes useful tips on construction, modifying, and testing of these two popular antennas.  Download this video and keep it in your antenna reference library.

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

http://www.HawaiiARRL.info.
http://www.arrl.org.
http://www.arrl.org/arrl-audio-news (a weekly podcast which is updated each Friday afternoon).
https://oahuarrlnews.wordpress.com.
https://hamradiohawaii.wordpress.com.
https://bigislandarrlnews.com.
https://www.eham.net.
http://www.southgatearc.org.

Thanks for joining us today.

Aloha es 73 de Russ (KH6JRM).

Tuesday, November 6, 2018

How a simple counterpoise can lower your SWR. Post #1670.


If you can't view the video, please enter this title URL into your browser search box: https://www.youtube.com/watch?v=SwhlSa8CUCk.

Here's a simple way to lower the SWR and increase the performance of any HF/VHF/UHF vertical antenna.  Pet (N6PET) found a high SWR on his Comet SBB 15 6M triband mobile antenna. By mounting the antenna on a 2M quarter wave counterpoise made from 2 speaker wires, he was able to drop his SWR below 1:3:1 for the frequency range of 50-54 MHz.  Most conventional wisdom seems to favor the idea that the counterpoise system supplies "the missing half" of a 1/4 wavelength vertical, thus restoring antenna "balance."  If you use vertical antennas, please consider adding a ground radial or counterpoise system to improve antenna efficiency and matching between the antenna and your transceiver.

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

http://www.HawaiiARRL.info.
http://www.arrl.org.
http://www.arrl.org/arrl-audio-news (a weekly podcast which is updated each Friday afternoon).
https://oahuarrlnews.wordpress.com
https://hamradiohawaii.wordpress.com.
https://bigislandarrlnews.com.
https://www.eham.net.
http://www.southgatearc.org.

Thanks for joining us today.

Aloha es 73 de Russ (KH6JRM).

Monday, November 5, 2018

Ideas for compact 80m/160m antennas. Post #1669.


If you can't view the video, please insert this title URL into your browser search box: https://www.youtube.com/watch?v=th9bPEm9i9k.

Propagation seems to favor the lower HF bands (80 meters/160 meters) these days.  A major problem in using these bands is the sheer size of the antennas involved.  If you live on a small urban lot, building and erecting an efficient antenna for 80 meters and 160 meters can be a real challenge.

In this video, Callum McCormick (M0MCX) explores several small HF antennas that can be used to work 80 meter and 160 meter contacts.  One of his suggestions is to design and build a linear-loaded inverted L antenna.  While this antenna has limited bandwidth and impedance matching problems, it can get you on the air if you design the antenna carefully.  Callum does a good job of visualizing the linear-loaded inverted L for those of us not blessed with sufficient space for a classic 1/2 wave dipole for these bands.

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

http://www.HawaiiARRL.info.
http://www.arrl.org.
http://www.arrl.org/arrl-audio-news (a weekly podcast which is updated each Friday afternoon).
https://oahuarrlnews.wordpress.com.
https://hamradiohawaii.wordpress.com.
https://bigislandarrlnews.com.
https://www.eham.net.
http://www.southgatearc.org.

Thanks for joining us today.

Aloha es 73 de Russ (KH6JRM).

Sunday, November 4, 2018

A Cheap Indoor Dipole for 80m-15m. Post #1668.


A Cheap Indoor Diple for 80m-15m. Post #1668.

https://appalachianow.wordpress.com/2012/03/15-a-cheap-dipole-for-80m-15m.

Author:  Josh Benson (NC4JB).

Accessed on 05 November 2018, 0052 UTC, Post #1668.

Please click link to read the full article by Josh.

Comment:

If you live in deed-restricted housing, you will recognize Josh's dilema.  Josh says he was compelled to consider an indoor dipole because he has "a townhouse with no attic, no basement, and a postage stamp yard, and putting antennas outside is entirely out of the question."  Does this sound familiar?  I faced this situation a few times during my amateur radio "career".

Josh overcame the problem with an antenna that was out of sight, out of mind--namely an indoor dipole that fit the contours of his home and still produced acceptable results.

In this post, Josh describes how he solved the antenna problem without violating the HOA/CC&R provisions of his home ownership.  Josh says the cost of the antenna project was remarkably small:

I used very inexpensive and easy to find materials to put the antenna together.  The antenna itself is made of #14 7-strand copper-clad steel available currently at 24 cents a foot.  I bought 100′ since the price drops to 19 cents per foot and you can never have too much antenna wire laying around.  The kit of 16 clear no-damage 1/2lb hooks cost $6 from the hardware store.  I also got a bag of ten 1/2″ PVC couplings to act as standoffs and supports where needed.  This bag cost $2.  For the feedline I used a standard 6′ RG 8/U coax line I bought from Radio Shack a while back for around $6.  I had to cut one of the ends off and strip it for the feedpoint itself, but the other end has an PL-239 on it conveniently.  Altogether I spent around $20 for the entire antenna, not counting tools I had laying around already.  If you don’t have any tools, at the very least you will need a wire cutter and stripper, and preferably a set of pliers, a drill and bits, and some electrical tape.


Josh provides all of the steps necessary to make and use this indoor dipole antenna.  Josh admits that an outdoor antenna would be better, but, as the old saying goes, a compromised antenna is better than no antenna at all.  Try Josh's indoor dipole antenna--you may be surprised just how well it performs.

Thanks for joining us today.

Aloha es 73 de Russ (KH6JRM).

Saturday, November 3, 2018

Weak Signal Propagation Reporter (WSPR). Post #1667.


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

Here's another exceptional video tutorial from Randy Hall (K7AGE).  In this video, Randy show us how to use the Weak Signal Propagation Reporter (WSPR) to check the performance of your antenna.  The original WSPR program was developed by Joe Taylor (K1JT) and is now enjoying worldwide popularity.

According to Randy, the WSPR program gives you real time data about your antenna.  WSPR sends your call sign, power level, and grid square during a short transmission period (usually less than 2 minutes). Receiving stations decode your transmission and post the results online. You can use a website to view a map of the stations you've heard and  the ones that have heard you.  An easy-to-use tool for measuring the effectiveness of your antenna.

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

http://www.HawaiiARRL.info.
http://www.arrl.org.
http://www.arrl.org/arrl-audio-news (a weekly podcast which is updated each Friday afternoon).
https://oahuarrlnews.wordpress.com.
https://hamradiohawaii.wordpress.com.
https://bigislandarrlnews.com.
https://www.eham.net.
http://www.southgatearc.org.

Thanks for joining us today.

Aloha es 73 de Russ (KH6JRM).

Friday, November 2, 2018

Ham Radio HF/VHF Antenna Lengths. Post #1666.


Ham Radio HF/VHF Antenna Lengths. Post #1666.

http://www.hamuniverse.com/hamantennalengths.html.

Author:  N4UJW (Hamuniverse.com).

Accessed on 03 November 2018, 0400 UTC, Post #1666.

Please click link or scroll down to read the complete artice.

Comment:  Here's a handy antenna length chart from N4UJW and the staff at Hamuniverse.com.  I copied the chart and placed it above my rig to facilitate HF/VHF antenna design and construction.  The chart covers 1/4 wave verticals, 1/2 wave dipoles, and full-wave loops.  I trust you will find the chart useful as you build new antennas for your station.

Thanks for joining us today.

Aloha es 73 de Russ (KH6JRM).

Here's the chart:


Ham Radio HF/VHF Antenna Lengths Chart in Feet
Ham Band (Meters)Frequency
(Mhz)
1/4 wave
(Feet)
1/2 wave
Dipole
(Feet
)
1 wave
Loop
(Feet)
1601.800130' 0''260' 0''558' 4''
1.850126' 6''253' 0''543' 3''
1.900123' 2''246' 4''528' 11''
2.000117' 0''234' 0''502' 6''
803.50066' 10''133' 9''287' 2''
3.75062' 5''124' 10''268' 0''
3.90060' 0''120' 0''257' 8''
4.00058' 6''117' 0''251' 3''
60
Under new rules effective March 5, 2012 

The maximum allowed power level WILL BE 100 Watts PEP (ERP) effective radiated power referenced to a dipole. If another type of antenna is used, the station licensee must maintain a record of either the antenna manufacturer?s data on the antenna gain or calculations of the antenna gain.
The frequencies listed here are the ONLY frequencies hams can use with the appropriate license under the new rules.
5.330.543' 9''87' 8''188' 5''
5.346.543' 7''87' 5''188' 0''
NEW 5.357---87' 4"---
5.371.543' 5''87' 1''187' 1''
5.403.543' 3''86' 6''186' 0''
407.00033' 5''66' 10''143' 7''
7.15032' 9''65' 5''140' 7''
7.30032' 1''64' 1''137' 8''
Ham Band (Meters)Frequency
(Mhz)
1/4 wave  (Feet)1/2 wave  Dipole
(Feet
)
1 wave  Loop
(Feet)
3010.10023' 2''46' 4''99' 6''
10.15023' 1''46' 1''99' 0''
2014.00016' 9''33' 5''71' 9''
14.15016' 6''33' 1''71' 0''
14.30016' 4''32' 9''70' 3''
14.35016' 4''32' 7''70' 0''
1718.06812' 11''25' 11''55' 7''
18.16812' 11''25' 9''55' 4''
1521.00011' 2''22' 3''47' 10''
21.20011' 0''22' 1''47' 5''
21.45010' 11''21' 10''46' 10''
1224.8909' 5''18' 10''40' 5''
24.9909' 4''18' 9''40' 3''
1028.0008' 4''16' 9''35' 11''
28.5008' 3''16' 5''35' 3''
29.7007' 11''15' 9''33' 10''
Note: For 28.400Mhz use formulas below 
Ham Band (Meters)Frequency
(Mhz)
1/4 wave (Feet)1/2 wave  Dipole
(Feet
)
1 wave Loop
(Feet)
650.0004' 8''9' 4''21' 1''
54.0004' 4''8' 8''18' 7''
2144.0001' 8''3' 3''7' 0''
148.0001' 7''3' 2''6' 9''
Antenna length is based on the following formulas:
1/2 wave dipole (feet) = 468 / frequency in Mhz. (1/4 wave, use 234 / frequency in Mhz)
Full wave loop (feet) = 1005 / frequency in Mhz
Cut total wire length slightly longer for connecting insulators/pruning as needed for lowest swr.

Thursday, November 1, 2018

How to Build a Frugal, Inexpensive 17 meter Rotatable Dipole Antenna. Post #1665.


If you can't view the video, please insert this title URL into your browser search box: https://www.youtube.com/watch?v=r-Uax53rrOM.

If you haven't tried the 17 meter amateur radio band (18.068 MHz to 18.168 MHz) yet, you may be surprised just how popular this band is when solar conditions permit.  Antennas for this chunk of the rf spectrum tend to be modest and fairly cheap, especially if you design and build your own antenna from locally available materials.

In this well-constructed video from "Marty Drifts", (Jim--WB2FOU), we learn just how easy it is to make a rotatable dipole antenna for 17 meters.  Each step of the construction process is fully explained and reviewed to ensure your understanding of this simple, useful antenna.

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

http://www.HawaiiARRL.info.
http://www.arrl.org.
http://www.arrl.org/arrl-audio-news (a weekly podcast which is updated on Friday afternoons).
https://oahuarrlnews.wordpress.com.
https://hamradiohawaii.wordpress.com.
https://bigislandarrlnews.com.
https://www.eham.net.
http://www.southgatearc.org.

Thanks for joining us today.

Aloha es 73 de Russ (KH6JRM).

Wednesday, October 31, 2018

Homemade dual band half wave flower pot antenna. Post #1664.


If you can't view the video, please insert this title URL into your browser search box: https://www.youtube.com/watch?v=rusIhx0ptNg.

Here's a nicely done video tutorial from M6CTP showing us how to make a dual band half wave flower pot antenna for 2 meters and 70 cm.  The step-by-step procedure is easy to understand and should give you good results when you're finished.  Most of the materials can be found at the nearest hardware or building supply outlet.  You may have to order coaxial cable if no local stores carry this item.

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

http://www.HawaiiARRL.info.
http://www.arrl.org.
http://www.arrl.org/arrl-audio-news (a weekly podcast which is updated each Friday afternoon).
https://oahuarrlnews.wordpress.com.
https://hamradiohawaii.wordpress.com.
https://bigislandarrlnews.com.
https://www.eham.net.
http://www.southgatearc.org.

Thanks for joining us today.

Aloha es 73 de Russ (KH6JRM).

Tuesday, October 30, 2018

Cheap Yagi 6 element beam antenna for 221.1 MHz. Post #1663.


If you can't view the video, please insert this title URL into your browser search box: https://www.youtube.com/watch?v=QCxpaCAhj3Y.

If you're tired of the noise and congestion on the 2 meter and 70 cm amateur radio bands, why not try the largely unexplored region around 221.1 MHz in the 1 3/4 meter band?  Because of the lack of readily available transceivers and antennas for this band,  you may have to build your own antenna and search awhile for a suitable VHF transceiver covering this band. The search may be worth the effort, since this slice of the rf spectrum offers many of the same advantages as the 2 meter amateur radio band, but without the noise and crowded conditions.

In this video, KA5D modifies an original design by WA5VJB to produce an inexpensive 6 element beam antenna centered at 221.1 MHz.  Most of the antenna materials can be found in your junk box or at the nearest hardware or building supply outlet. 

Although KA5D uses this horizontally polarized beam antenna for rover and portable use, it can be used at your home station to contact any 220-222 MHz repeaters that may serve your area. 

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

http://www.HawaiiARRL.info.
http://www.arrl.org.
https://www.arrl.org/arrl-audio-news (a weekly podcast which is updated each Friday afternoon).
https://oahuarrlnews.wordpress.com.
https://hamradiohawaii.wordpress.com.
https://bigislandarrlnews.com.
https://www.eham.net.
http://www.southgatearc.org.

Thanks for joining us today.

Aloha es 73 de Russ (KH6JRM).

Monday, October 29, 2018

Extreme Broadband Dipole Antenna for 2 meters. Post #1662.


If you can't view this video, please insert this title URL into your browser search box: https://www.youtube.com/watch?v=PSED0Pxe7c0.

This well-made and easy-to-understand video from "Giovanniram22" shows us how to build a broadband coaxial folded dipole antenna using RG-213 coaxial cable.  According to the author, the antenna is suitable for both transmitting and receiving on a frequency range of 140 MHz to 150 MHz.  This antenna could also be used on the 3rd harmonic to work stations in the 440 MHz-450 MHz amateur radio band (70 cm).  Most of the materials for this antenna can be found in your "junk box" or at your neighborhood building supply or home improvement outlet.

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

http://www.HawaiiARRL.info.
http://www.arrl.org.
http://www.arrl.org/arrl-audio-news (a weekly podcast which is updated each Friday afternoon).
https://oahuarrlnews.wordpress.com.
https://hamradiohawaii.wordpress.com.
https://bigislandarrlnews.com.
https://www.eham.net.
http://www.southgatearc.org.

Thanks for joining us today.

Aloha es 73 de Russ (KH6JRM).

Ham College 46. Post #1661.


If you can't view the video, please insert this title URL into your browser search box: https://www.youtube.com/watch?v=MGFHh6Hul7c.

"Ham College" is one of my favorite video podcasts.  The presentations are laid back, easy to understand, and contain lots of humor.  In this edition from AmateurLogic.TV, the team continues its exploration of the General Class Amateur Radio License with an emphasis on Solar Propagation Effects and the characteristics of Delta Loop and Log Periodic Antennas.  The antenna segment of this program is well-organized and clearly explained.

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

http://www.HawaiiARRL.info.
http://www.arrl.org.
http://www.arrl.org/arrl-audio-news (a weekly podcast which is updated each Friday afternoon).
https://oahuarrlnews.wordpress.com.
https://hamradiohawaii.wordpress.com.
https://bigislandarrlnews.com.
https://www.eham.net.
http://www.southgatearc.org.

Thanks for joining us today.

Aloha es 73 de Russ (KH6JRM).

Sunday, October 28, 2018

3 band delta loop. Post #1660.


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

If you need a simple, quiet antenna that covers the 15/12/10 meter amateur radio bands, please consider this horizontal loop from Sandy (G4XRV).  The antenna is fed with balanced line and, apparently, doesn't need an antenna transmatch (tuner).  This design can be scaled for any range of amateur radio bands, if you build the antenna for the lowest selected frequency and use an antenna transmatch to reach higher bands.  I have a 40 meter delta loop which covers all ham bands between 40 and 10 meters.  I use an antenna "tuner" and 450 ohm ladder line to keep the rig happy.  If you can only use one antenna for HF, consider building a delta loop.  You won't be disappointed.

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

http://www.HawaiiARRL.info.
http://www.arrl.org.
http://www.arrl.org/arrl-audio-news (a weekly podcast which is updated each Friday afternoon).
https://oahuarrlnews.wordpress.com.
https://hamradiohawaii.wordpress.com.
https://bigislandarrlnews.com.
https://www.eham.net.
http://www.southgatearc.org.

Thanks for joining us today.

Aloha es 73 de Russ (KH6JRM).


Saturday, October 27, 2018

Barbed Wire Antenna. Post #1659.


If you can't view the video, please insert this title URL into your browser search box: https://www.youtube.com/watch?v=j_itg93_Fes.

Just about anything can be used as an HF antenna, provided you can match the impedances between rig and wire and have a suitable ground radial system.  In this video, WA5PMO uses a random length of barbed wire fence for his antenna.  Apparently, the emergency lashup works, saying "I worked Canada on 20 meters from Wixon Valley, Texas (using) a Yaesu-879D."  Be sure to tap your creativity if you need an HF antenna in a hurry.

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

http://www.HawaiiARRL.info.
http://www.arrl.org.
http://www.arrl.org/arrl-audio-news (a weekly podcast which is updated each Friday afternoon).
https://oahuarrlnews.wordpress.com.
http://hamradiohawaii.wordpress.com.
https://bigislandarrlnew.com.
https://www.eham.net.
http://www.southgatearc.org.

Thanks for joining us today.

Aloha es 73 de Russ (KH6JRM).

Friday, October 26, 2018

DIY Man Portable Magnetic Loop Antenna Beginner's Build. Post #1658.


If you can't view the video, please insert this title URL into your browser search box: https://www.youtube.com/watch?v=Dw1rz0CVn90.

Here's another exceptional video tutorial from Julian (OH8STN).  This video demonstrates two different antennas, both built on the popular Chameleon magnetic Loop Starter Kit.  Either one of these compact antennas will prove useful for those living in deed-restricted homes (HOAs and CC&Rs) or for those needing a small, effective HF antenna for field or portable use.

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

http://www.HawaiiARRL.info.
http://www.arrl.org.
http://www.arrl.org/arrl-audio-news (a weekly podcast which is updated each Friday afternoon).
https://oahuarrlnews.wordpress.com.
https://hamradiohawaii.wordpress.com.
https://bigislandarrlnews.com.
https://www.eham.net.
http://www.southgatearc.org.

Thanks for joining us today.

Aloha es 73 de Russ (KH6JRM).

Thursday, October 25, 2018

Vertical Dipole in Tree. Post #1657.


If you can't view video, please insert this title URL into your browser search box: https://www.youtube.com/watch?v=RI2_T-LeYEU.

If you have a tall tree on your property, you may want to try this antenna.  As Stan Gibilisco (W1GV) explains, this multiband HF antenna can be used where space is at a premium.  Each leg of the dipole should be at least a 1/4 wavelength at your lowest frequency of use.  An antenna transmatch (i.e. "tuner") and ladder line will permit multiband use.  Try this simple antenna and "work DX on a budget."

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

http://www.HawaiiARRL.info.
http://www.arrl.org.
http://www.arrl.org/arrl-audio-news (a weekly podcast which is updated each Friday afternoon).
https://oahuarrlnews.wordpress.com.
https://hamradiohawaii.wordpress.com.
https://bigislandarrlnews.com.
https://www.eham.net.
http://www.southgatearc.org.

Thanks for joining us today.

Aloha es 73 de Russ (KH6JRM).

Wednesday, October 24, 2018

Jeri Ellesworth (AI6TK) Pacificon keynote talk released. Post #1656.


If you can't view the video, please insert this title URL into your browser search box: https://www.youtube.com/watch?v=tOb9BIYjvA0.

If you couldn't attend Pacificon 2018, you missed one of the true highlights of the Amateur/Ham Radio event calendar. Thanks to Randy Hall (K7AGE), we have a recording of one of the most inspiring and passionate defenders of the Amateur Radio Service speaking before an overflow crowd at this prestigious meeting of radio amateurs.  Jeri Ellesworth (AI6TH) shows a love and in-depth understanding of what Amateur/Ham Radio means to our communities and to ourselves.  A masterful stroke of optimism for an age of cynicism and doubt.

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

http://www.HawaiiARRL.info.
http://www.arrl.org.
http://www.arrl.org/arrl-audio-news (a weekly podcast which is updated each Friday afternoon).
https://oahuarrlnews.wordpress.com.
https://hamradiohawaii.wordpress.com.
https://bigislandarrlnews.com.
https://www.eham.net.
http://www.southgatearc.org.

Thanks for joining us today.

Aloha es 73 de Russ (KH6JRM).


Tuesday, October 23, 2018

Using a wire fence as an HF antenna. Post #1655.


If you can't view the video, please insert this title URL into your browser search box: https://www.youtube.com/watch?v=IRh11KM2w8A.

Almost any metal object can be used to receive HF signals--in this case, we find a wire fence pressed into service as a random length wire RECEIVING antenna.  The operating position consists of a Yaesu FT-817 and a MFJ 16010 L-match "tuner".  Transmitting with this antenna could present some safety and equipment problems, although this operator didn't mention any difficulties in getting the fence to work.  Antenna experimentation can be a learning experience if safety procedures are followed.

For the latest Amateur/Ham Radio news and information, please visit these websites:
http://www.HawaiiARRL.info.
http://www.arrl.org.
http://www.arrl.org/arrl-audio-news (a weekly podcast which is updated each Friday afternoon).
https://oahuarrlnews.wordpress.com.
https://hamradiohawaii.wordpress.com.
https://bigislandarrlnews.com.
https://www.eham.net.
http://www.southgatearc.org.

Thanks for joining us today.

Aloha es 73 de Russ (KH6JRM).

Monday, October 22, 2018

Installing a Mobile Radio in Your Car. Post #1654.


If you can't see the video, please insert this title URL into your browser search box: https://www.youtube.com/watch?v=FzBDf-JEa3w.

Installing a mobile radio in your vehicle can be easy if you follow the steps outlined by Pete Hadley (K6BFA) in this video.  Pete shows how he installed his 2 m/70 cm transceiver and antenna in his vehicle without drilling large holes in the vehicle body and by keeping all wires and cables out of sight.  A very efficient and operator- friendly installation.

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

http://www.HawaiiARRL.info.
http://www.arrl.org.
http://www.arrl.org/arrl-audio-news (a weekly podcast which is updated each Friday afternoon).
https://hamradiohawaii.wordpress.com.
https://oahuarrlnews.wordpress.com.
https://bigislandarrlnews.com.
https://www.eham.net.
http://www.southgatearc.org.

Thanks for joining us today.

Aloha es 73 de Russ (KH6JRM).

Sunday, October 21, 2018

EA5ON Mobile HF Antenna. Post #1653.


If you can't view the video, please insert this title URL into your browser search box: https://www.youtube.com/watch?v=1Da43_y_OMw.

Here's a simple, cheap, and efficient mobile HF antenna from Duncan (EA5ON).  According to Duncan, the ball mount is from Hustler; the 12-ft/3.65-m extendible whip and screwdriver coil come from MFJ; and the mast extension is from the DX Engineering staff.  While this arrangement makes for an excellent mobile antenna, Duncan feels it's best to operate this antenna system from a stationary position, such as a park, beach, or campground.  For more information on this antenna, please visit http://www.ea5on.com.

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

http://www.HawaiiARRL.info.
http://www.arrl.org.
http://www.arrl.org/arrl-audio-news (a weekly podcast which is updated each Friday afternoon).
http://oahuarrlnews.wordpress.com.
https://hamradiohawaii.wordpress.com.
https://bigislandarrlnews.com.
https://www.eham.net.
http://www.southgatearc.org.

Thanks for joining us today.

Aloha es 73 de Russ (KH6JRM).

Saturday, October 20, 2018

Hanging Ham Radio Antenna From Trees W/Slingshot. Post #1652.

Hanging Ham Radio Antenna From Trees W/Slingshot. Post #1652.

Source:  https://www.youtube.com/watch?v=UDkbNcbQl2o.

Author:  KM6JUR.

Please click link to download the video.

Comment:

Tall trees on your property can serve as ideal supports for your antennas, be they HF, VHF, or UHF.  The major problem with tree-supported antennas is getting all those wires and small beams into the upper regions of the tree without incurring antenna damage or lost wire.

In this video from KM6JUR, we see how a simple slingshot, fishing reel, a few sinkers/weights, and some fishing line can launch your antenna at a desirable height for DX contacts.  Of course, as this video points out, you may have to try a few times before your antenna is firmly secured in a tree.

Although there are several commercial antenna launchers available, I find a do-it-yourself approach more to my liking.  My launch system is similar to the one used in this video.  I have an old Walmart "Marksman Folding Slingshot", an old Zebco fishing reel, fishing line, and some lead weights (sinkers) in my junk box which I use to nest my antennas in the trees surrounding my home.

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

http://www.HawaiiARRL.info.
http://www.arrl.org.
http://www.arrl.org/arrl-audio-news (a weekly podcast which is updated each Friday afternoon).
https://oahuarrlnews.wordpress.com.
https://hamradiohawaii.wordpress.com.
https://bigislandarrlnews.com.
https://www.eham.net.
http://www.southgatearc.org.

Thanks for joining us today.

Aloha es 73 de Russ (KH6JRM).

Friday, October 19, 2018

5/8 wave J-pole antenna for 145 MHz. Post #1651.


If you can't view the video, please insert this title URL into your browser search box: https://www.youtube.com/watch?v=fEdy7mbZ5ms.

Thanks to Pityu Nagy for this fascinating video on how to make a 5/8 J-pole antenna for 145 MHz.  Pityu was able to use some copper tubing, a steel wire from an old CB antenna, and a homemade coil to make this efficient and simple 2 meter antenna.  This would make an excellent emergency 2 meter antenna for your club or home station.

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

http://www.HawaiiARRL.info.
http://www.arrl.org.
http://www.arrl.org/arrl-audio-news.
https://oahuarrlnews.wordpress.com.
https://hamradiohawaii.wordpress.com.
https://bigislandarrlnews.com.
https://www.eham.net.
http://www.southgatearc.org.

Thanks for joining us today.

Aloha es 73 de Russ (KH6JRM).

Thursday, October 18, 2018

Design your own 5/8 wave vertical antenna. Post #1650.


Design your own 5/8 wave vertical antenna.

https://www.qsl.net/w4sat/five8th.htm.

Author:  W4SAT.

Please click link to read the full article.

Comment:  Here's a handy calculator for those who wish to experiment with 5/8 wavelength antennas, both for HF and VHF/UHF.

Despite some matching and loading issues, the 5/8 wave antenna can deliver approximately 3 dB gain over a 1/4 wave vertical and exhibits a low angel of radiation (approximately 16 degrees)--something that will help you snag more DX contacts.

The article outlines some of the design considerations necessary to make this type of vertical antenna work properly.  The discussion ends with an easy plug in program that figures element lengths in both feet and meters.  The program uses the standard formula of 585/f for feet and 178.308/f for meters.

With a properly designed coil, a decent ground plane element, and some stiff wire, you can have an efficient 5/8 wave vertical antenna in just a few hours.

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

http://www.HawaiiARRL.info.
http://www.arrl.org.
http://www.arrl.org/arrl-audio-news (a weekly podcast which is updated each Friday afternoon).
https://oahuarrlnews.wordpress.com.
https://hamradiohawaii.wordpress.com.
https://bigislandarrlnews.com.
https://www.eham.net.
http://www.southgatearc.org.

Thanks for joining us today.

Aloha es 73 de Russ (KH6JRM).

Wednesday, October 17, 2018

How to build a three element beam for 2 meters. Post #1649.


If you can't view the video, please insert this title URL into your browser search box: https://www.youtube.com/watch?v=d8RVqsdnKow.

Here's a very simple and effective 3-element yagi for the 2 meter amateur radio band.  According to the video's author, "Prepping Ohio", most of the parts were found in or around his home.  Using scrap lumber, some stiff wire, and a spare tube to support the antenna, he was able to make several contacts using about 1 watt of power.  The antenna is vertically polarized and works well for contacting mobile stations.

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

http://www.HawaiiARRL.info.
http://www.arrl.org.
http://www.arrl.org/arrl-audio-news (a weekly podcast which is updated each Friday afternoon).
https://oahuarrlnews.wordpress.com.
https://hamradiohawaii.wordpress.com.
https://bigislandarrlnews.com.
https://www.eham.net.
http://www.southgatearc.org.

Thanks for joining us today.

Aloha es 73 de Russ (KH6JRM).

Tuesday, October 16, 2018

Antenna for Condo Backyard. Post #1648.


If you can't view the video, please insert this title URL into your browser search box: https://www.youtube.com/watch?v=MXTYTytR56A

If you need a rapidly deployable, yet stealthy HF antenna in a deed-restricted area, please check out this simple end-fed inverted vee configuration from AC2RJ.  All you need is a tripod support, some wire, a rudimentary ground radial system, a small antenna "tuner", and a telescoping fiberglass pole to elevate your antenna element to begin your backyard adventure. Coupled with a dependable QRP rig such as the Yaesu 817, you'll enjoy some interesting contacts.  When you're done for the day, just collapse the fiberglass mast, fold up the tripod, and store the antenna parts in your garage or shack. 

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

http://www.HawaiiARRL.info.
http://www.arrl.org.
http://www.arrl.org/arrl-audio-news (a weekly podcast which is updated each Friday afternoon).
https://oahuarrlnews.wordpress.com.
https://hamradiohawaii.wordpress.com.
https://bigislandarrlnews.com.
https://www.eham.net.
http://www.southgatearc.org.

Thanks for joining us today.

Aloha es 73 de Russ (KH6JRM).

Monday, October 15, 2018

Backyard Inverted-L Antenna. Post #1647.


If you can't view the video, please insert this title URL into your browser's search box: https://www.youtube.com/watch?v=Wq4A9skU3Zs

An inverted L antenna is an alternative HF antenna choice if you can't support a full halfwave dipole on your property. In this video, Craig Sheppard shows us his simple inverted L antenna, which has made some excellent DX contacts as well as good ragchews from around his home.  Craig's antenna consists of an 58-ft/17.68 meters horizontal element and a 24-ft /7.31 meters vertical section.  Please note the use of a counterpoise wire to complete the antenna circuit.  A good, basic antenna that will bring you many hours of enjoyment.

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

http://www.HawaiiARRL.info.
http://www.arrl.org.
http://www.arrl.org/arrl-audio-news (a weekly podcast which is updated each Friday afternoon).
https://hamradiohawaii.wordpress.com.
https://oahuarrlnews.wordpress.com.
https://bigislandarrrlnews.com.
https://www.eham.net.
http://www.southgatearc.org.

Thanks for joining us today.

Aloha es 73 de Russ (KH6JRM).

Sunday, October 14, 2018

234: Basics of Near Field Probes. Post #1646.


If you can't view the video, please insert this title URL into your browser searchbox: https://www.youtube.com/watch?v=ctynv2klT6Q.

Thanks to Alan (W2AEW) for this excellent video tutorial on the basics of near field probes.  According to Alan, "Near Field probes can be very helpful tracking down sources of RF emissions and radiation."  Alan explains how near field probes work and how to use them to resolve RF leakages and stray RF problems in your gear.  He also lists helpful links on near field probing, including plans and discussions on how to make your own near field probes.  An outstanding tutorial that should be part of your reference library.

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

http://www.HawaiiARRL.info.
http://www.arrl.org.
http://www.arrl.org/arrl-audio-news (a weekly podcast which is updated each Friday afternoon).
https://oahuarrlnews.wordpress.com.
https://hamradiohawaii.wordpress.com.
https://bigislandarrlnews.com.
https://www.eham.net.
http://www.southgatearc.org.

Thanks for joining us today.

Aloha es 73 de Russ (KH6JRM).

Saturday, October 13, 2018

Winding a 1:4 Current Balun with 15 turns. Post #1645.


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

Excellent video from N7JFP on how to make a simple 1:4 balun.  N7JFP takes you step by step through the assembly process, using 18 gauge copper wire and a T-130 toroid.  This balun will prove  useful for a variety of antennas, ranging from multi-band dipoles to the simplest HR vertical antenna.

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

http://www.HawaiiARRL.info.
http://www.arrl.org.
http://www.arrl.org/arrl-audio-news ( a weekly podcast which is updated each Friday afternoon).
https://hamradiohawaii.wordpress.com.
https://oahuarrlnews.wordpress.com.
https://bigislandnews.com.
https://www.eham.net.
http://www.southgatearc.org.

Thanks for joining us today.

Aloha es 73 de Russ (KH6JRM).

Friday, October 12, 2018

A simple broadband HF vertical antenna. Post #1644.


A simple broadband HF vertical antenna. Post #1644.

https://g8jnj.net/broadbandhfvertical.htm.

Author:  Martin Ehrenfried (G8JNJ).

Accessed on 13 October 2018, 0045 UTC. Post #1644.

Comment:  In this well-written and fully documented post from Martin Ehrenfried (G8JNJ), we learn how to make a simple broadband antenna which doesn't need an antenna "tuner", and is capable of providing "moderate performance" on all amateur radio bands from 7 MHz to 28 MHz.  Martin says he built this antenna for around L20 (less than $50 US).  Martin uses this antenna for beacon monitoring using Faros software, as a WSPR personal beacon, or for HF ALE operations using PC ALE.  The report is richly illustrated with graphs, photos, and various performance data.  Here are the key elements of his broadband HF vertical antenna:

The basic components of the antenna are a 9m fishing pole, 6m support pole, home built 5:1 transformer and some wire. These are configured as shown in the diagram below.
 


 

Thursday, October 11, 2018

Small, Effective Antenna Build. Post #1643.


If you can't view the video, please insert this title URL into your browser search box: https://www.youtube.com/watch?v=wIgqnISFs7Y

In this well-paced video podcast, George Thomas (W5JDX) and Vito Dipinto (VA3VMD) discuss how to design, build, and use a small backyard antenna.  Vito has turned his privacy fence, some poles, a few lengths of wire, and several connectors into a useful, effective HF antenna. If you're confined to a small urban lot, you'll find Vito's suggestions helpful in erecting an antenna that will serve your HF needs for years to come.

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

http://www.HawaiiARRL.info.
http://www.arrl.org.
http://www.arrl.org/arrl-audio-news (a weekly podcast which is updated each Friday afternoon).
https://oahuarrlnews.wordpress.com.
https://hamradiohawaii.wordpress.com.
https://bigislandarrlnews.com.
https://www.eham.net.
http://www.southgatearc.org.

Thanks for joining us today.

Aloha es 73 de Russ (KH6JRM).


Wednesday, October 10, 2018

Building a Multi-Band HF Dipole Antenna. Post #1642.


If you can't view the video, please insert this title URL into your browser search box: https://www.youtube.com/watch?v=8KHzsKYsZL0.

Expertly done video from Larry (WD0AKX) on how to build a multi-band HF antenna covering the 40-20-15-10, and 6 meter amateur radio bands.  This classic antenna uses a single coaxial feed line to feed separate dipoles connected to a common point.  The antenna is often called a "Fan Dipole" because the individual antenna elements are "fanned out" from a single connector.  Larry does an excellent job of taking you step-by-step through the design, construction, and tuning process. If you have only one feed line and wish multi-band operation, then the "Fan Dipole" antenna may be what you're looking for.

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

http://www.HawaiiARRL.info.
http://www.arrl.org.
http://www.arrl.org/arrl-audio-news (a weekly podcast which is updated each Friday afternoon).
https://oahuarrlnews.wordpress.com.
https://hamradiohawaii.wordpress.com.
https://bigislandarrlnews.com.
https://www.eham.net.
http://www.southgatearc.org.

Thanks for joining us today.

Aloha es 73 de Russ (KH6JRM).

Tuesday, October 9, 2018

Homebrew ground plane antenna for 50 MHz. Post #1641.


If you can't view the video, please insert this title URL into your browser search box: https://www.youtube.com/watch?v=X7i3NnN2KwQ..

If you need a simple, inexpensive, and highly portable antenna for the amateur radio 6 meter band, then this homebrew ground plane antenna from Peter Parker (VK3YE) may be what you're looking for.

The radiating element and the attached radials are both a quarter wavelength long for 6 meters.  Ground radial wires are medium thickness copper wire and are sloped at a 45-degree angle coming off the mounting plate.  The antenna can be scaled for 10 meters, 2 meters, and 70 cm.

This is a basic, no-frills antenna that will serve you well in both portable and emergency situations.

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

http://www.HawaiiARRL.info.
http://www.arrl.org.
http://www.arrl.org/arrl-audio-news (a weekly podcast which is updated each Friday afternoon).
https://oahuarrlnews.wordpress.com.
https://hamradiohawaii.wordpress.com.
https://bigislandarrlnews.com.
https://www.eham.net.
http://www.southgatearc.org.

Thanks for joining us today.

Aloha es 73 de Russ (KH6JRM).

Monday, October 8, 2018

Very simple portable dipole. Post #1640.


If you can't view this video, please insert this title URL into your browser search box: https://www.youtube.com/watch?v=CPPP3JWNJLY

You don't need a complex antenna system to operate in the field.  As Peter Marks demonstrates, all you need is some wire for your favorite bands, a 6 meter/19.68 feet "squid pole", and your HF go-kit to get on the air from your favorite park, beach, or campsite.  In this video, Peter erects a simple inverted vee using a suitable length of wire, a telescoping fiberglass rod, and an aluminum ground stake to complete his antenna system.  Please note the simplicity and organization of his go-kit, especially the presence of the outstanding Elecraft KX3 transceiver.  Make one of these antennas for portable or emergency use and put it in your vehicle.  The antenna is easy to put up and take down.

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

http://www.HawaiiARRL.info.
http://www.arrl.org.
http://www.arrl.org/arrl-audio-news (a weekly podcast which is updated each Friday afternoon).
https://oahuarrlnews.wordpress.com.
https://hamradiohawaii.wordpress.com.
https://bigislandarrlnews.com.
https://www.eham.net.
http://www.southgatearc.org.

Thanks for joining us today.

Aloha es 73 de Russ (KH6JRM).

Sunday, October 7, 2018

Antenna Dimension Chart. Post #1639.


Antenna Dimension Chart. Post #1639.

http://ve3elb.ham-radio.ch/antenna%20chart.html.

Author:  VE3ELB.

Accessed on 08 October 2018, 0445 UTC, Post #1639.

Please click link to read the full article.

Comment:  Here's an interesting antenna article from VE3ELB. Included in this post is an antenna dimension chart which will help you design, test, and use HF antennas.  Following the antenna dimension chart is a series of simple, easy-to-make, and inexpensive antennas you can make by consulting the antenna dimension chart.  These antennas include a simple wire antenna, a standard dipole antenna, and the W4GI multi-band mystery antenna.

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

http://www.HawaiiARRL.info.
http://www.arrl.org.
http://www.arrl.org/arrl-audio-news (a weekly podcast which is updated each Friday afternoon).
https://oahuarrlnews.wordpress.com.
https://hamradiohawaii.wordpress.com.
https://bigislandarrlnews.com.
https://www.eham.net.
http://www.southgatearc.org.

Thanks for joining us today.

Aloha es 73 de Russ (KH6JRM).

A Ladder Line Slim Jim Antenna for 2m. Post #1638.


If you can't see the video, please insert this title URL into your browser search box: https://www.youtube.com/watch?v=sCgRhi1tET4.

A ladder line slim jim antenna for the 2 meter amateur radio band is light, portable, and easy to make. In this video, the "Radio Prepper" shows us an easy way to make this versatile, compact antenna which can be stored in your vehicle or at your home station for emergency use.  This antenna can be used with both your home VHF equipment or your HT.  A nice, weekend project.

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

http://www.HawaiiARRL.info.
http://www.arrl.org.
http://www.arrl.org/arrl-audio-news (a weekly podcast which is updated each Friday afternoon).
https://oahuarrlnews.wordpress.com.
https://hamradiohawaii.wordpress.com.
https://bigislandarrlnews.com.
https://www.eham.net.
http://www.southgatearc.org.

Thanks for joining us today.

Aloha es 73 de Russ (KH6JRM).

Friday, October 5, 2018

Review of Pracomm SML-1000-1 Loop Antenna (#95). Post #1637.


If you can't view the video, please insert this title URL into your browser search box: https://www.youtube.com/watch?v=S6hh93WKCG8.

If you live in an antenna-restricted home, apartment, or condo, then a magnetic loop antenna may be a way of getting on the air without yourself visible to neighbors.  In this video, Dave Casler (KE0OG) reviews the Pracomm SML-1000-1 Loop Antenna. Dave does a good job of explaining the theory and design behind this loop antenna, which shares some features of more expensive magnetic loop antennas from MFJ and other manufactures.  If you're interesting in this antenna, please contact Roberto Arranaga (KX4CY) at http://www.pracomm.store.

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

http://www.HawaiiARRL.info.
http://www.arrl.org.
http://www.arrl.org/arrl-audio-news (a weekly podcast which is updated each Friday afternoon).
https://hamradiohawaii.wordpress.com.
https://oahuarrlnews.wordpress.com.
https://bigislandarrlnews.com.
https://www.eham.net.
http://www.southgatearc.org.

Thanks for joining us today.

Aloha es 73 de Russ (KH6JRM).

Thursday, October 4, 2018

These Spray-on antennas could be the future of communications. Post #1636.


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

Here's a fascinating antenna article from Drexel University which describes the use of sprayed-on antennas for medical, industrial, and communications applications.  Such technology could prove useful for radio amateurs and first responders as they try to reestablish communications damaged by natural or human-made disasters.  Imagine going to your ARRL Field Day site and spraying your antenna to a wooden wall, tree, or picnic table.  Perhaps the "antenna in a can" will become reality sooner than you think.

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

http://www.HawaiiARRL.info
http://www.arrl.org.
http://www.arrl.org/arrl-audio-news (a weekly podcast which is updated each Friday afternoon).
https://oahuarrlnews.wordpress.com.
https://hamradiohawaii.wordpress.com.
https://bigislandarrlnews.com.
https://www.eham.net.
http://www.southgatearc.org.

Thanks for joining us today.

Aloha es 73 de Russ (KH6JRM).

Wednesday, October 3, 2018

Making open wire feedline. Post #1635.


If you can't view the video, please insert this title URL into your browser search box: https://www.youtube.com/watch?v=yrREQyMI7RI.

Australian radio amateur Peter Parker (VK3YE) offers another excellent, concise antenna video for hams.  In this video, Peter shows us how to make an open wire feedline for HF antennas.  According to Peter, "open wire feedline is a cheap and low-loss feedline ideal for feeding dipoles."  Open wire feedline  "tolerates significant impedance mismatches without much loss and in conjunction with a balanced antenna coupler allows multiband operations on a single dipole." Peter offers valuable suggestions on how to build and use this type of feedline.

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

http://www.HawaiiARRL.info.
http://www.arrl.org.
http://www.arrl.org/arrl-audio-news (a weekly podcast which is updated each Friday afternoon).
https://oahuarrlnews.wordpress.com.
https://hamradiohawaii.wordpress.com.
https://bigislandarrlnews.com.
https://www.eham.net.
http://www.southgatearc.org.

Thanks for joining us today.

Aloha es 73 de Russ (KH6JRM).

Tuesday, October 2, 2018

Homebrew 2M Moxon antenna project. Post #1634.


If you can't view the video, please insert this title URL into your browser search box: https://www.youtube.com/watch?v=OEWb_H2m5k4.

Do you need a simple, easily-built, and highly portable  2 meter antenna for field or emergency work?  Then, a basic Moxon Antenna is what you need.  In this video, Paul Athersmith shows us how to design, build, and use a 2 meter Moxon for dependable local or regional use.  The antenna is lightweight and can be made from locally available materials.  Why not spend some time this weekend making this effective and beautiful 2 meter antenna?  If this antenna proves useful, you can always scale the basic design for any amateur/ham radio band of your choice.  I onced use a Moxon design for a 10 meter antenna and got excellent results.  Of course, that was a few years ago when propagation was better than it is now.  The Moxon is an excellent choice for VHF/UHF service.

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

http://www.HawaiiARRL.info.
http://www.arrl.org.
http://www.arrl.org/arrl-audio-news (a weekly podcast which is updated each Friday afternoon).
https://oahuarrlnews.wordpress.com.
https://hamradiohawaii.wordpress.com.
https://bigislandarrlnews.com.
https://www.eham.net.
http://www.southgatearc.org.

Thanks fro joining us today.

Aloha es 73 de Russ (KH6JRM).

Monday, October 1, 2018

Dipole antenna for hf (home made!). Post #1633.


If you can't view the video, please insert this title URL into your browser search box: https://www.youtube.com/watch?v=QZ-mA6Fn0HA.

Here's another attempt to design, build, and use an indoor antenna where outside antennas are not permitted.  M6STL made this 20 meter hf antenna from 5 meters/16.4 feet of RG-8X coaxial cable.  It isn't clear if the antenna is receive only.  Apparently, the antenna is usable in his location.  If you're in an experimental mood, make an indoor hf antenna and see what results you get.  A compromise antenna is better than no antenna.

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

http://www.HawaiiARRL.info.
http://www.arrl.org.
http://www.arrl.org/arrl-audio-news (a weekly podcast which is updated each Friday afternoon).
https://oahuarrlnews.wordpress.com.
https://hamradiohawaii.wordpress.com.
https://bigislandarrlnews.com.
https://www.eham.net.
http://www.southgatearc.org.

Thanks for joining us today.

Aloha es 73 de Russ (KH6JRM).

Sunday, September 30, 2018

Tilted Terminated Folded Dipole Antenna. Post #1632.


If you can't view this video, please insert this title URL into your browser search box: https://www.youtube.com/watch?v=Batw43uoQ9I.

Here's a nicely-done video on how to design, build, and use a Tilted Terminated Dipole Antenna.  The video describes a T2FD antenna project from design to installation featuring a 10w terminating resistor made from 4 X 5w 390 ohm resistors in a series-parallel configuration and enclosed in a balun/resistor assembly for structural integrity.  In days past, B & W made several variations of this antenna for the Department of Defense and other U.S. Government agencies.

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

http://www.HawaiiARRL.info.
http://www.arrl.org.
http://www.arrl.org/arrl-audio-news (a weekly podcast which is updated each Friday afternoon).
https://oahuarrlnews.wordpress.com.
https://hamradiohawaii.wordpress.com.
https://bigislandarrlnews.com.
https://www.eham.net.
http://www.southgatearc.org.

Thanks for joining us today.

Aloha es 73 de Russ (KH6JRM).

Saturday, September 29, 2018

RV Antennas for Amateur Radio. Post #1631.


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

If own a mobile home or a recreational vehicle (RV), then you know how vital communications can be.  Why not provide an extra margin of safety and enjoyment by installing an amateur radio station in your RV or other vacation vehicle?  In this well-produced video from Reese Peter Griffin (DDS), we see several ways to mount both HF and VHF/UHF amateur radio antennas.  Each installation is simple, effective, and relatively cheap.  Of particular note is the "mast-to-ladder" method which allows rapid deployment of both HF and VHF/UHF antennas.

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

http://www.HawaiiARRL.info.
http://www.arrl.org.
http://www.arrl.org/arrl-audio-news (a weekly podcast which is updated each Friday afternoon).
https://oahuarrlnews.wordpress.com.
https://hamradiohawaii.wordpress.com.
https://bigislandarrlnews.com.
https://www.eham.net.
http:  www.southgatearc.org.

Thanks for joining us today.

Aloha es 73 de Russ (KH6JRM).

Friday, September 28, 2018

Counterpoise/Rat Tail for Ham Radio. Post #1630.


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

Adding a short "rat tail" or counterpoise wire to your hand held VHF/UHF transceiver can boost the range of your radio, reduce the swr a bit, and lead to clearer communications.  The "rat tail" becomes the missing half of the radio's vertical antenna.  This video shows you a simple way of making and attaching the "rat tail" to your transceiver.  A  basic, simple way to increase the coverage of your VHF/UHF transceiver.

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

http://www.HawaiiARRL.info,
http://www.arrl.org.
http://www.arrl.org/arrl-audio-news (a weekly podcast which is updated each Friday afternoon).
https://oahuarrlnews.wordpress.com.
https://hamradiohawaii.wordpress.com.
https://bigislandarrlnews.com.
https://www.eham.net.
http://www.southgatearc.org.

Thanks for joining us today.

Aloha es 73 de Russ (KH6JRM).

Thursday, September 27, 2018

HF mobile antenna new project. Post #1629.


If you can't view this video, please insert this title URL into your browser search box: https://www.youtube.com/watch?v=YShh25VYb3c>

Here's an excellent example of how to make a durable and efficient HF mobile antenna from CT1JRZ.  The keys to his success are a well-designed and built coil and an effective grounding system for his vehicle equipment.  This antenna could also be used on an urban lot where space is at a premium.  A nicely done antenna project!

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

http://www.HawaiiARRL.info.
http://www.arrl.org.
http://www.arrl.org/arrl-audio-news (a weekly podcast which is updated each Friday afternoon).
https://oahuarrlnews.wordpress.com.
https://hamradiohawaii.wordpress.com.
https://bigislandarrlnews.com.
https://www.eham.net.
http://www.southgatearc.org.

Thanks for joining us today.

Aloha es 73 de Russ (KH6JRM).

Wednesday, September 26, 2018

The W8JK Antenna. Post #1628.


The W8JK Antenna. Post #1628.

http://qrznow.com/the-w8jk-is-a-famous-and-effective-dx-antenna/

Author:  ZR6TXA.

Please click link to read the full article.

Comment:  It's alway fun to build and try a classic antenna.  Such is the case with the W8JK beam antenna, originally designed, built, and used by John Krauss in 1937.  Krauss updated his ground breaking design in the June 1982 issue of "QST", published by the ARRL.

In this post, ZR6TXA takes us step-by-step through the design, construction, and use of this simple, effective beam antenna.  Simply stated, the W8JK antenna consists of 2 closely-spaced parallel dipoles driven with opposite phase.  Properly designed, the W8JK can cover 20 meters through 10 meters with elements only 7.3 meters/23.94 ft long.  According to ZR6TXA, optimum element spacing is around 2.6 meters/8.52 feet.

The article contains helpful drawings, photos, and suggestions for the novice antenna experimenter.  Why not built and use a "classic" antenna during your next long holiday weekend?  The W8JK would be the perfect choice for those looking for a simple, effective, and inexpensive HF beam antenna.

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

http://www.HawaiiARRL.info.
http://www.arrl.org.
http://www.arrl.org/arrl-audio-news (a weekly podcast which is updated each Friday afternoon).
https://oahuarrlnews.wordpress.com.
https://hamradiohawaii.wordpress.com.
https://bigislandarrlnews.com.
https://www.eham.net.
http://www.southgatearc.org.

Thanks for joining us today.

Aloha es 73 de Russ (KH6JRM).

Tuesday, September 25, 2018

HF Indoor Loop Antenna DIY-Simple & Easy to Build. Post #1627.


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

Here's another fascinating idea for an indoor HF antenna.  A well-produced video which gives you an idea of what can be accomplished with a carefully built magnetic loop antenna."Chappy Happy" demonstrates some of the capabilities of this Do-It-Yourself (DIY) antenna.  Please note the classic Hallicrafters S-38 receiver used in these tests.  While the video is well constructed and flows well, it's a little short on technical details.  This antenna covers amateur/ham radio frequencies between 5 MHz and 14 MHz.

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

http://www.HawaiiARRL.info.
http://www.arrl.org.
http://www.arrl.org/arrl-audio-news (a weekly podcast which is updated each Friday afternoon).
https://oahuarrlnews.wordpress.com.
https://hamradiohawaii.wordpress.com.
https://bigislandarrlnews.com.
https://www.eham.net.
http://www.southgatearc.org.

Thanks for joining us today.

Aloha es 73 de Russ (KH6JRM0.

Monday, September 24, 2018

Ham Radio 2m/70 cm Vertical Dipole Antenna. Post #1626.


If you can't view the video, please insert this title URL into your browser search box: https://www.youtube.com/watch?v=RcO5WAiksNI.

Here's another fascinating and easy-to-build antenna idea from Dave Tadlock (KG0ZZ).  In this well-organized tutorial, Dave takes us step-by-step through the theory, design, construction, and use of a 2m/70cm vertical dipole antenna.  This antenna is perfect for limited space areas or for portable/emergency use in the field.  Make one for your home station and another for your "go-kit" bag in your vehicle.

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

http://www.HawaiiARRL.info.
http://www.arrl.org.
http://www.arrl.org/arrl-audio-news (a weekly podcast which is updated each Friday afternoon).
https://oahuarrlnews.wordpress.com.
https://hamradiohawaii.wordpress.com.
https://bigislandarrlnews.com.
https://www.eham.net.
http://www.southgatearc.org.

Thanks for joining us today.

Aloha es 73 de Russ (KH6JRM).

Sunday, September 23, 2018

Testing a bi-square antenna on 10 metres. Post #1625.


If you can't views the video, please insert this title URL into your browser search box: https://www.youtube.com/watch?v=xKNE25ZNgu4.

Australian radio amateur Peter Parker (VK3YE) has produced an interesting video about the bi-square antenna--one of the few antennas I've never tried.  According to Peter, the construction of this antenna is simple:  Take two 10 meter (approximately 33-feet) of wire, "form into a square with the ends at the top and bottom.  Support at the top and tie off to maintain a square diamond shape.  Connect to transceiver via (an) antenna coupler that can handle high impedances...the support should be 7-8 metres (23 to 26-feet) high."  Peter believes the antenna can deliver around 3-4 dB gain with a figure 8 pattern broadside to the wires.

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

http://www.HawaiiARRLinfo.
http://www.arrl.org.
http://www.arrl.org/arrl-audio-news (a weekly podcast which is updated each Friday afternoon).
https://oahuarrlnews.wordpress.com.
https://hamradiohawaii.wordpress.com.
https://bigislandarrlnews.com.
https://www.eham.net.
http://www.southgatearc.org.

Thanks for joining us today.

Aloha es 73 de Russ (KH6JRM).