Sunday, October 22, 2017

Homebrew Antenna Launcher-Ham Radio

Saturday, October 21, 2017

A radial plate for cheapskates. Post #1287.


A radial plate for cheapskates
(https://www.eham.net/article/38076).
Author:  Bill Savage (K3AN).
Accessed on 21 October 2017, 2055 UTC, Post #1287.
Please click link to read the full article.
Comment:

I've always enjoyed designing, building, and using "homebrewed" 1/4 wavelength vertical antennas. In the past, my ham radio shack has been located in areas where a full-length dipole antenna is impractical, especially for 80 and 160 meter operations. Vertical, sloper, and inverted vee configurations have worked well, considering my limited horizontal space.

While building vertical antennas is educational and often fun, finishing the necessary counterpoise or ground radial system has proven to be tedious and time consuming.

One way to deploy a ground radial system without much fuss is to use a metal radial plate as a connecting point for your vertical antenna counterpoise or ground radial system.  Several manufacturers make and sell these ground plates, and most of them have received excellent reviews in the amateur radio news media.  The only drawback is the cost.

In this article by Bill Savage (K3AN), we learn how some common household sink products can cut the cost of a metal radial plate. This article originally was published by www.eham.net on 30 April 2009.

Bill says the path to a homemade metal radial plate begins at the nearest home improvement center or neighborhood hardware store:

It's nothing more than a replacement kitchen sink strainer that you can buy at Home Depot or Lowe's for about $2.00. It's made from stainless steel and is “pre-drilled” for 10-24 size screws. You can readily install ten screws and nuts in the outermost ring of holes, and another five in the next ring. Install two solder or crimp-type terminal lugs under each nut and there's your 30-radial capacity. Furthermore, as shown in the photo, the strainer's center hole is large enough to fit over a copper-clad ground rod. You just have to remove the rubber stopper and pull out the metal center stem.

0x08 graphic



In my installation, each screw is fastened to the strainer with a compression lockwasher and nut. Then the radial lugs are placed over the nut and secured by a second nut. To prevent “galling” or seizing up of the stainless hardware, I placed Noalox grease on the screw threads. I also placed some grease on the flat surfaces of the lugs. Home Depot and Lowe's carry Noalox in the electrical section.

This would make an excellent weekend project.  Just follow Bill's instructions and you'll have a homemade metal ground plate for your 1/4 wavelength vertical antenna in only a few hours.

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 afternoon).

https://paper.li/kh6jrm/1430289353 (Amateur Radio News & Information).

Other sites of interest:

Hawaii Science Digest (https://paper.li/f-147623615).

Hawaii Intelligence Digest (https://hawaiiintelligencedigest.com).

Hawaii Intelligence Daily (https://paper.li/f-1482109921).


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).


Friday, October 20, 2017

Ham Radio 10 Meter Ground Plane Antenna. Post #1286.


If you can't view this article, please enter this title URL into your browser search box: https://www.youtube.com/watch?=aLgFeTpIX4A.

In this video from Dave Tadlock (KG0ZZ), we get a step-by-step tutorial on how to design, build, and use a 10 meter ground plane antenna.  The antenna can be supported on a mast using a simple counterpoise as the ground plane or as a ground-mounted vertical employing a ground radial system.  In my experience, mounting the antenna at a height of approximately 1/2 wavelength (16.5 feet/5/03 meters) above ground level,along with a simple counterpoise or drooping radial system will give better performance than leaving the antenna mounted close to the ground.

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 afternoon).
https://paper.li/kh6jrm/1430289353 (Amateur Radio News 7 Information).

Other sites of interest:

Hawaii Science Digest (https://paper.li/f-1476233615).
Hawaii Intelligence Digest (https://hawaiiintelligencedigest.com).
Hawaii Intelligence Daily (https://paper.li/f-1482109921).

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, October 19, 2017

Ham Radio - Viewer Request - My home HF antenna solution, 160-10 on a ...


If you can't view this video, please insert this title URL into your browser search box: https://www.youtube.com/watch?v=9o0pIMeKR7w.  This is post #1285 in a continuing series of "Simple Ham Radio Antennas."

This video from Kevin Loughin (KB9RLW) is a good example of what can be done to cover the amateur radio bands from 160 meters through 10 meters with a few simple antennas, ranging from Off-Center Fed Dipoles (OCFD) to inverted vees.  At look at Kevin's current antenna arrangement may give you some excellent ideas on adapting multiband HF antennas to fit your unique housing and land situation.  The important thing is to get on the air.  Some compromise antennas do very well if we're willing to accept less-than-perfect performance.

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 afternoon).
https://paper.li/kh6jrm/1430289353 (Amateur Radio News & Information).

Other sites of interest:

Hawaii Science Digest (https://paper.li/f-1476233615).
Hawaii Intelligence Digest (https://hawaiiintelligencedigest.com).
Hawaii Intelligence Daily (https://paper.li/f-1482109921).

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

Opinions expressed in this blog are mine unless otherwise stated.

Aloha es 73 de Russ (KH6JRM).

Wednesday, October 18, 2017

Emergency Antenna Platform System (EAPS). Post #1284.


If you can't view this video, please insert this title URL into your browser search box: https://www.youtube.com/watch?v=UFAj2rSPILA.

Here's a handy device for erecting emergency antennas in parking lots--just right for Field Day activities or portable operations.  The device is made by the Boca Bearing Company.  Be sure it's legal to attach this device to lamp posts, which may be owned by city, county, or federal agencies. Still, this is a great idea if you didn't pack a telescoping fiberglass mast in your "Go Kit."

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 afternoon).
https://paper.li/kh6jrm/1430289353 (Amateur Radio News & Information).

Other sites of interest:

Hawaii Science Digest (https://paper.li/f-1476233615).
Hawaii Intelligence Digest (https://hawaiiintelligencedigest.com).
Hawaii Intelligence Daily (https://paper.li/f-1482109921).

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).