Tuesday, July 23, 2019

Magloop antenna & my new coupling system (4K video). Post 1937.


If you can't see the video, please insert this title URL into your browser search box: https://www.youtube.com/watch?v=HAsG8q_oWT8.

I've been following the progress of Paul's (OM0ET) homemade Magloop Antenna over the course of several videos documenting the design, construction, and testing of this compact antenna.

In this segment, Paul makes what he calls a "practical improvement" of his homemade magloop with the addition of a new coupler unit which doesn't require the use of screwdriver--an ingenious design feature which works very well.  Paul has given us a remarkably well-made and clean design which should encourage experimentation within the amateur/ham radio community.

If you want more information on Paul's project, please visit this website:

http://www.sk-tech.sk.om0et.

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, July 22, 2019

HOW TO BUILD A BALUN 4 TO 1 TUTORIAL. Post 1936.


. If you can't see the video, please insert this title URL into your browser search box: https://www.youtube.com/watch?v=Tl_8msSbpDQ.

Other than the mildly distracting audio track, this video from 4Z5JO does an excellent job of showing how to build a simple, inexpensive, and effective 4:1 balun for your HF antenna system. 

The video provides a step-by-step method of designing and building this useful antenna accessory.  4Z5JO provides a full list of materials needed for this easy 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).

Sunday, July 21, 2019

Ferrite rod antenna 160 meter. CQ de RN3RBH. Post 1935.


If you can't see the video, please insert this title URL into your search box: https://www.youtube.com/watch?v=gWfe3powlvY.

An utterly fascinating and somewhat cryptic demonstration of a 160 meter ferrite rod antenna from Russian ham Yuri (RN3RBH).

It isn't clear whether this antenna is transmit capable.  Most likely, this homebrew 160 meter antenna is designed for reception purposes only.  It probably nulls out noise very well.  If you live in an RFI-rich environment, then you may want to consider building something similar to Yuri's ferrite rod 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).


Saturday, July 20, 2019

"Short" 160-Meter Vertical. Post 1934.


If you can't see the video, please insert this title URL into your browser search box: https://www.youtube.com/watch?v=ek14ax7pCfo.

Getting on the 160-Meter Amateur Radio Band from a small urban lot can be a difficult challenge.

You may find this curious top-loaded vertical from Stan Gibilisco (W1GV) a possible answer to your 160-Meter operating issues.  In Stan's design, a capacitance hat forms part of four guy wires supporting the vertical section of this antenna.  Try out this antenna and see if it works.

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.com.
https://bigislandarrlnews.com.
https://www.eham.net.
http://www.southgatearc.org.

Thanks for joining us today.

Aloha es 73 de Russ (KH6JRM).

Friday, July 19, 2019

Long Wire Antenna. Post 1933.


If you can't see the video, please insert this title URL into your browser search box: https://www.youtube.com/watch?v=3lO_h1bqmmY.

Here's another fascinating antenna video from Denis (VE3BF).

In this video, Denis shows us how to make an efficient, inexpensive, and simple HF long wire antenna for both home and portable use.

The key to Denis's long wire antenna is a 9:1 UnUn which solves much of the antenna-feed line mismatch found in such antennas.  A good antenna transmatch (i.e. "tuner") and a simple ground radial or counterpoise system will improve the performance of this antenna.

Denis does a good job of explaining the concept, construction techniques, and tuning of this antenna.

If you want more information on HF long wire antennas, check out this website:
http://udel.edu/~mm/ham/randomWire.

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://bigislandarrlnews.com.
https://www.eham.net.
http://www.southgatearc.org.

Thanks for joining us today.

Aloha es 73 de Russ (KH6JRM).