Friday, September 20, 2019

Military HF Radio - Episode 5 - HF Antennas. Post 1997.


If you can't see the video, please insert this title URL into your browser search box: https://www.youtube.com/watch?v=wdrIOKXF7jE.

A fascinating look at the HF antennas used by worldwide military forces to maintain reliable communications with troops in the field.

The discussion on NVIS antennas (Near Incident Skywave) is especially good. NVIS HF antennas are excellent for local and regional communications and require only modest wire and mast arrangements.  This video gives you plenty of suggestions for your next HF antenna.  If you're active in emergency communications and need dependable communications for your team or net, then these antennas may be what you need.

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/
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).

Thursday, September 19, 2019

40m Dipole Construction and Troubleshooting (#215). Post 1996.


If you can't see the video, please insert this title URL into your browser search box: https://www.youtube.com/watch?v=lO14KuWM3bE.

I've always enjoyed Dave Casler's (KE0OG) series of ham radio videos.  He's down to earth, patient, and thoroughly versed in the topic he chooses to produce.

In this video, Dave discusses the basic construction and troubleshooting strategies employed in designing, building, erecting, testing, and using the "classic" HF Dipole Antenna. 

This video would make a good club or classroom program, especially for those preparing for amateur radio exams.

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

Thanks for joining us today.

Aloha es 73 de Russ (KH6JRM).

Wednesday, September 18, 2019

EFHW Antenna --- Building The Transformer. Post 1995.


If you can't see the video, please insert this title URL into your browser search box: https://www.youtube.com/watch?v=sty7RlXQoJI.

Thanks to Steve Ellington for this excellent tutorial on how to design, build, test, and use a 49:1 transformer for End Fed Half Wave Antennas (EFHW).

Although EFHW antennas are fairly simple and inexpensive, they do require a transformer to match the nominal 50 ohm impedance of your HF transceiver to the often high impedance (2500 ohm plus) of half wavelength wire antennas.

In addition to helpful construction details, Steve also shows us how to mount the matching device.  According to Steve, the toroid part number is 5952003801.  You can find these toroids here:  http://www.fair-rite.com/products/toroids.  You can find the enclosure at Lowe's.

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/
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, September 17, 2019

HOW TO BUILD A 6 METER PLUS ANTENNA - Raymond Jackson ( kb9col ). Post 1994.


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

This tutorial from the late Raymond Jackson (KB9COL) is a great, masterful, step-by-step instructional video on how to build a high performance "6 Meter-Plus Antenna."

Here are few of Raymond's notes about the project:

The Length of the 75 ohms coaxial cable " each " is 32 inches. This is from the tip of center " Male " ( Hot ) pin of the PL 259 to the tip of the eye solder terminal .

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

Thanks for joining us today.

Aloha es 73 de Russ (KH6JRM).

Monday, September 16, 2019

2 Meter VHF Quarter Wave Ground Plane Antenna - Ham Radio Q&A. Post 1993.


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

Are you looking for an easily assembled, simple, and inexpensive 2 meter ground plane antenna?  Then this antenna idea from Michael Martins (KB9VBR) could be your answer.

This 1/4 wavelength ground plane antenna is made from a length of PVC pipe, a SO-239 chassis connector, and enough wire to create the vertical radiating element and the above-ground counterpoise system. Make one for your emergency "go-kit" or as a standby antenna for your shack.

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/
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).