Thursday, December 12, 2019

Speaker Wire 44' Doublet Antenna. Post 2081.


If you can't see the video, please insert this title URL into your browser search box: https://www.youtube.com/watch?v=e3x_uOzIFJ4.

Here's another great HF antenna for those with small urban lots or for those who enjoy operations in the field.

Craig Sheppard has done a good job of showing how surplus wire and a few common parts can get you on the air with a multiband HF antenna. 

Craig gives this quick outline of this homebrew antenna:

This is a quick look at my portable 40m-10m 44' doublet antenna made from speaker wire, milk bottle cap insulators, a crappie pole, and hiking poles.

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Although 44 feet/13.41 m seems a bit short for 40-through 10 meter coverage, Craig's antenna seems to do the job.  Be sure to have an antenna transmatch (i.e. "tuner") to facilitate tuning and SWR reduction.


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

http://www.HawaiiARRL.info.
http://www.arrl.org.
http://www.blubrry.com/arrlaudionews/
http://www.hamradioupdate.com.
http://www.southgatearc.org.
https://www.eham.net.
https://bigislandarrlnews.com.
https://oahuarrlnews.wordpress.com.
https://hamradiohawaii.wordpress.com.

Thanks for joining us today.

Aloha es 73 de Russ (KH6JRM).

Wednesday, December 11, 2019

How to make a 4 to 1 balun cheap and easy


If you can't see the video, please insert this title URL into your browser search box: https://www.youtube.com/watch?v=7lYY7nkKrWo.  This is post 2080 in a continuing series of articles on simple homemade antennas.

Thanks to the "Wiltshire Man" for this simple, easily made 4 to 1 balun for multiband HF antennas.

Here's how this radio amateur describes this project:

I built this simple air cored balun in next to no time. No need to worry about toroids etc. It works from 3 to 30 mhz and handles 200 watts easy. If you use thicker wire it will handle a cool 1KW.

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

http://www.HawaiiARRL.info.
http://www.arrl.org.
http://www.blurbrry.com/arrlaudionews/
http://www.hamradioupdate.com.
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, December 10, 2019

Ham radio 40 meter homebrew ground mount vertical


If you can't see the video, please insert this title URL into your browser search box: https://www.youtube.com/watch?v=2qEQN_FV0Pk.  This is post 2079 in a continuing series of simple, homemade ham radio antennas.

Thanks to Ric (K8YIO) for this simple, elegant 40 meter vertical antenna for your backyard.  This antenna will cover 40 and 15 meters without a "tuner".  A transmatch (i.e. "tuner") will allow coverage of 20 meters and 10 meters.

The key to this antenna is a good ground radial or counterpoise system.  Lay down as many radial wires as you can to help boost performance and reduce ground losses.

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

http://www.HawaiiARRL.info.
http://www.arrl.org.
http://www.blubrry.com/arrlaudionews/
http://www.hamradioupdate.com.
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, December 9, 2019

Building a cheap, portable, vertical HF Antenna


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

If you need a simple, efficient, and easily made HF vertical antenna, then this video from Adrian ("One Time Pad") will interest you.  The antenna can be made from locally available parts or from your "junk box."  Adrian says "this antenna will work other bands with a tuner/matching unit."  Be sure to ad some extra ground radials for added efficiency.

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

http://www.HawaiiARRL.info.
http://www.blubrry.com/arrlaudionews/
http://www.arrl.org.
http://www.hamradioupdate.com.
http://www.southgatearc.org.
https://oahuarrlnews.wordpress.com.
https://hamradiohawaii.wordpress.com.
https://bigislandarrlnews.com.
https://www.eham.net.

Thanks for joining us today.

Aloha es 73 de Russ (KH6JRM).

Sunday, December 8, 2019

Top loaded HF vertical antenna with ground tuning unit


If you can't see the video, please insert this title URL into your browser search box: https://www.youtube.com/watch?v=P7lxt8EatDw.  This is post 2077 in a continuing series of simple ham radio antennas.

Thanks to Australian radio amateur Peter Parker (VK3YE) for this easy to understand tutorial on how to build a top loaded HF vertical antenna with a ground tuning unit.  This antenna is ideal for small urban lots or for portable operations.  Besides the basic antenna, all you really need is a decent ground radial/counterpoise system to complement this reduced size vertical antenna.

Here are some of Peter's guidelines:

"Don't have much height but have something metal underneath? If so a top loaded vertical is a great antenna to try. Just 10 metres wide and 5 metres tall it will even load up on 3.5 MHz. Especially if you're over salt water, you're unlikely to get anything better for its size. The key items needed include wire, two poles, a simple antenna coupler (an L-match is fine), something to clip onto the counterpoise railing and a ground tuning unit. I'll probably describe a more refined version later but it comprises a variable capacitor in series with an inductor. It's also desirable to have an RF current indicator. PS: Like these videos? Wish to support this channel? If so please store this link to Amazon Shopping as a bookmark or favourite. https://www.amazon.com/?&_encoding=UT... Then when you buy something I receive a small commission (at no extra cost to you). Or check my books page to see if any appeal. http://home.alphalink.com.au/~parkerp..."
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For the latest Amateur/Ham Radio news and information, please visit these websites:  http://www.HawaiiARRL.info; http://www.arrl.org; http://www.blubrry.com/arrlaudionews/; http://www.hamradioupdate.com; http://www.southgatearc.org; https://oahuarrlnews.wordpress.com; https://hamradiohawaii.wordpress.com; https://bigislandarrlnews.com; https://www.eham.com

Thanks for joining us today.

Aloha es 73 de Russ (KH6JRM).