Posts

Making open wire feed line. Post #1556.

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

Open wire feedline is cheap and low-loss, especially if you make it yourself.  In this video, Peter Parker (VK3YE) shows us a simple method of making your own balanced feed line for dipole antennas.  Balanced line feeders, used in conjunction with a balanced antenna "tuner" or "coupler", will allow your antenna system to tolerate significant impedance mismatches without adding much loss.  Balanced feed line used with a suitable antenna transmatch (i.e. "tuner") will permit multiband use on a single HF dipole.

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://hamradiohawaii.wordpress.com.
https://bigislandarrlnews.com.
https://amateurrad…

G5RV Multi Band HF Dipole Antenna. Post #1555.

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If you can't see the video, please insert this title URL into your browser search box: https://www.youtube.com/watch?v=aeNHIQ_j4Dk

This well-produced and richly illustrated tutorial on the classic G5RV HF Dipole Antenna was presented to the Brandon Amateur Radio Society in Brandon, Florida in 2017 by Bernie Huth (W4BGH).  Bernie does an excellent job of  explaining the pros and cons of this popular HF antenna from the late Louis Varney (G5RV).  Although Varney envisioned his design primarily as a 3/2 wavelength antenna for the 20 meter Amateur Radio band, radio amateurs have used the antenna for multiband use.  The G5RV is an excellent choice for the 20 meter band.  Performance on other HF Amateur Radio bands is good enough to qualify as stand alone HF antenna if you can only erect one HF 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 podca…

Amateur Radio Bicycle Mobile Setup. Post #1554.

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

Here's a way to use Amatuer/Ham Radio while you work on shedding a few pounds in useful exercise.  Why not equip your bicycle for 2 meter/70 cm mobile operation?

In this short, well-made video, "taverned" shows us how he used a mag mount antenna, a simple C clamp, and a basic ground system to convert his mountain bike into a mobile station.  The project is straight forward, simple, and gives you emergency communications while you peddle down the road.

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://bigislandarrlnews.com.
https://amateurradionewsinformation.com (Amateur Radio News & Information).
https://www.eha…

Installing a Longwire Antenna with the Palomar Engineers Multi-Ratio Cube Unun. Post #1553.

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If you can't see the video, please insert this title URL into your browser search box: https://www.youtube.com/watch?v=iktlPZyGWh0.

The key to effective performance in a long wire or random length end fed wire antenna is the proper matching of the high impedance of the antenna to the low impedance of your HF rig.  In this video from "Signal Search", we learn how the Palomar Engineers Multi-Ratio Cube Unun makes the impedance match possible.  This unun, joined with with an external antenna "tuner" and a decent ground radial or counterpoise system, allows you to use a single wire as a multiband HF antenna. "Signal Search" shows us how the unun helps maximize antenna performance, while reducing RFI and SWR issues.

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-sudio-news (a weekly podcast which is updated each Friday afternoon).
https://hamradi…

Roll Up Slim Jim Antenna for Emergency Preparedness. Post #1552.

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If you can't see the video, please insert this title URL into your browser search box: https://www.youtube.com/watch?v=196-sS2yYak.

A nicely done video from Coach Helder (W2NTC) on how to set up and use the 2m/70cm rollup slim jim/J-Pole antenna by Nelson Antennas.  Coach discusses indoor and outdoor applications of this sturdy, well-crafted antenna.  Antenna tests were made using a Yaesu VX-8DR HT.  You may want to buy two of these antennas--one for your emergency "go-kit" and the other for home use.  If you feel more adventuresome, you could make your own slim jim/J-Pole from locally available materials.

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://bigislandarrlnews.com.
https://amateurradionewsinformation.com (Amateur Radio News & Informa…

Cubical Quad Antennas. Post #1551.

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

A basic, no frills explanation of the theory, construction, and use of cubical quad antennas from Dave Tadlock (KG0ZZ).  Although cubical quads can be built for the HF Amateur Radio bands, most radio amateurs seem to prefer such antennas for the VHF/UHF bands where the dimensions, materials, build time are less than similar antennas for HF.  Dave does an excellent job of introducing this versatile antenna and shows you how to build one for your home shack.  If you need an antenna for serious VHF/UHF DX or to just reach a fringe repeater site in your area, then the cubical quad may be the best antenna for you.

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://hamradioh…

Tuning a CB Whip for use on the 10 Meter Ham Band. Post #1550.

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If you can't see the video, please insert this title URL into your browser search box: https://www.youtube.com/watch?v=m3Oho0lcbis.

There are still many unused CB (Citizens Band) antennas collecting dust at garage sales, auctions, estate sale, and your neighborhood recycling center.  You can put these antennas to good use on the 10 Meter Amateur Radio band by making a few easy adjustments with a wire cutter and an antenna SWR analyzer.

Tony (KD8RTT) and his brother, Andy (KK4LWR) do just that in this well-made video tutorial.  In this case, Tony and Andy trim and test a coil shortened mobile CB whip for the 10 Meter band. The vertical element is trimmed and checked frequently with a MFJ-259B SWR Analyzer.  If you feel ambitious, try a similar procedure with one of those 102 in/259.08 cm steel whip antennas used on big trucks.  Years ago, I converted one of these large whip antennas to the 10 Meter band and mounted it on a telescoping fiberglass mast with four elevated radials to…