Monday, January 15, 2018

LZ1AQ-Personal Home Page. Post #1373.


LZ1AQ-Personal Home Page
(http://www.lz1aq.signacor.com).
Accessed on 15 January 2018, 2015 UTC.
Please click post title or insert URL into your browser search box to download post.
Comment:

I ran across this fascinating website while I was searching for new antenna ideas.  The website created by Chavdar Levkov (LZ1AQ) is an interesting adventure into antenna experimentation.

Levkov, who has a Doctor of Science in the field of Technical Electrocardiology, is founder and CEO of a small Bulgarian company that designs and produces electrocardiology equipment.  While most of Levkov's work deals with medical equipment, he has designed a variety of antennas and kits for radio amateurs.

Here's a list of his current antenna articles:

In addition to antenna articles, Levkov has produced two useful kits for radio amateurs:

An Active Antenna Amplifier Home Kit and a Variable Delay Line Kit for Wide Band Phased Arrays.

I found this site interesting, well organized, and useful for antenna experimenters.

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

http://www.HawaiiARRL.info.
https://oahuarrlnews.wordpress.com.
https://bigislandarrlnews.com.
http://www.arrl.org.
http://www.arrl.org/arrl-audio-news (a weekly podcast which is updated each Friday).
http://amateurradionewsinformation.com (Amateur Radio News & Information).

Other sites of interest:

https://hawaiisciencedigest.com (Hawaii Science Digest).
https://hawaiiintelligencedigest.com (Hawaii Intelligence Digest)
https://paper.li/f-1482109921 (Hawaii Intelligence Daily).
https://prgnewshawaii.wordpress.com (Hawaii News Digest)

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).

Sunday, January 14, 2018

9 Simple J Pole Antenna Projects. Post #1372.


9 Simple J Pole Antenna Projects
(https://www.dxzone.com/9-j-pole-antenna-projects/).
Accessed on 14 January 2018, 2315 UTC, Post #1372.

Please click title or go to the link provided to read the full article.

Comment:

The J Pole antenna is a classic design originating in World War I for the German Zeppelin airships that bombed London and other areas of the western front.  The original "Zepp" antenna has been refined into many variants, including the J Pole, the Off-Center Fed Dipole, the Windom antenna, and even the classic W3EDP antenna from the early 1920s,

The antenna remains popular for amateur radio bands from 20 meters to 70 cm.  The antenna is simple, easy to build, and effective.

The J Pole Antenna is basically an end-fed omni directional half-wave antenna, matched to the feed line by a quarter wave transmission stub.

The J Pole Antenna is effective because it operates at harmonics of the fundamental frequency for which it is designed.

This post discusses 9 simple J Pole Antennas derived from four basic types:  the common J Pole, the SlimJim, the Super-J, and the collinear J Pole Antenna.

J Pole antennas are fun to build and use, especially for the 2 meter and 70 cm amateur radio bands. Over the course of several years, I've built J Pole Antennas for 15 and 10 meters--the design works well on the upper HF frequencies (20, 17, 15, 12, 10, and 6 meters), although the 20 meter J Pole can be a bit unwieldy.

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

http://www.HawaiiARRL.info.
https://oahuarrlnews.wordpress.com.
https://bigislandarrlnews.com.
http://www.arrl.org.
http://www.arrl.org/arrl-audio-news (a weekly podcast which is updated each Friday).
http://amateurradionewsinformation.com (Amateur Radio News & Information).

Other sites of interest:

http://hawaiisciencedigest.com (Hawaii Science Digest).
https://https://hawaiiintelligencedigest.com (Hawaii Intelligence Digest).
https://paper.li/f-1482109921 (Hawaii Intelligence Daily).
https://prgnewshawaii.wordpress.com (Hawaii News Digest).

Be sure to check 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).

Saturday, January 13, 2018

Winter Ham Radio QRP Field Station @ 65° North. Post #1371.


If you can't view this video, please insert this title URL into your browser search box: https://www.youtube.com/watch?v=JV7eTmGCu_Q.

Another informative and illuminating video tutorial from Julian (OH8STN--Survival Tech Nord). In this video, Julian takes his portable station into winter conditions at 65 degrees North Latitude to show that emergency or field operations can be done under extreme conditions.

If you're going to participate in the winter edition of the ARRL Field Day on 27-28 January 2018 in the northern part of Europe, Asia, USA, and Canada, you may want to pay particular attention to the suggestions from Julian.

In this video, Julian shows us the basic equipment, operating procedures, and basic arctic survival steps needed to make a cold weather QRP portable operation a success. Julian uses a pulk sled to pull his gear; sets up the shelter and wood stove; and arranges his antenna, rig, and computer for  operations on 40, 20, 20, and 17 meters.  Please don't try this unless you are fully prepared for bitter cold and snow.

For the latest Amateur 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).
https://oahuarrlnews.wordpress.com.
https://bigislandarrlnews.com.
http://amateurradionewsinformation.com (Amateur Radio News & Information).

Other sites of interest:

http://hawaiisciencedigest.com (Hawaii Science Digest).
https://hawaiiintelligencedigest.com (Hawaii Intelligence Digest).
https://paper.li/f-1482109921 (Hawaii Intelligence Daily).
https://prgnewshawaii.wordpress.com (Hawaii News Digest).

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

Opinions expressed in this blog are those of the reporters and correspondents unless otherwise stated.

Thanks for joining us today.

Aloha es 73 de Russ (KH6JRM).


Friday, January 12, 2018

Ham Radio - Investigating the 'Inverted L' Antenna. Post #1370.


If you can't view this video, please insert this title URL into your browser search box: https://www.youtube.com/watch?v=PyLA0ZqcXc.

Building and using an antenna for 160 and 80 meters can be a definite challenge for those of us living on small urban lots.  One of the best ways to reach these bands is to design, construct, and use the classic "Inverted L" Antenna.  In this video, GreggW. (OH2FFY) does an excellent job of explaining the theory and practical construction procedures needed to make an effective, simple, and inexpensive Inverted L to fit your property.  Now that propagation is favoring 160, 80, and 40 meters, the inverted L should be an antenna worth considering.

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

http://www.HawaiiARRL.info.
https://oahuarrlnews.wordpress.com.
https://bigislandarrlnews.com.
http://www.arrl.org.
http://www.arrl.org/arrl-audio-news (a weekly podcast which is updated each Friday).
http://amateurradionewsinformation.com (Amateur Radio News & Information).

Other sites of interest:

http://hawaiisciencedigest.com (Hawaii Science Digest).
https://hawaiiintelligencedigest.com (Hawaii Intelligence Digest).
https://paper.li/f-1482109921 (Hawaii Intelligence Daily).
https://prgnewshawaii.wordpress.com (Hawaii News Digest).

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).

Thursday, January 11, 2018

Ham Radio Modular Portable Antenna System. Post #1369.


If you can't view this video, please insert this title URL into your browser search box: https://youtu.be/BOHvM_2G340.

In this video from Julian (OH8STN--Survival Tech Nord), we see a variety of modular antenna systems suitable for portable or emergency use.  Most of the modular kits use some variation of the Chameleon line of HF antennas and a small QRP rig, such as the Yaesu FT-817 transceiver.  Julian presents some excellent suggestions for portable and emergency antennas, as well as ideas for your emergency "go-box" or "go-kit".  An excellent, well organized introduction to portable HF antennas.

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

http://www.Hawaii ARRL.info.
https://oahuarrlnews.wordpress.com.
https://bigislandarrlnews.com.
http://www.arrl.org.
http://www.arrl.org/arrl-audio-news (a weekly podcast which is updated each Friday).
http://amateurradionewsinformation.com (Amateur Radio News & Information).

Other sites of interest:

http://hawaiisciencedigest.com (Hawaii Science Digest).
https://hawaiiintelligencedigest.com (Hawaii Intelligence Digest).
https://paper.li/f-1482109921 (Hawaii Intelligence Daily).
https://prgnewshawaii.wordpress.com (Hawaii News Digest).

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).