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Author Topic: Identify Old Antenna  (Read 1107 times)
KE5GFJ
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Posts: 3




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« on: September 06, 2012, 11:07:36 AM »

We have a brand new Old Stock Radio Shack antenna we cannot identify. It was part of an estate sale. There are no instructions in the box. The box is old and falling apart but all the parts inside are brand new. The markings on the box are as follows: "Radio Shack 21-929. Then under these numbers is the number 932. There is also another number 47036 stamped on the side of the box. As near as we can tell it was one of Radio Shacks Ham or CB antennas because the number 21-929 is very close to some of the other Radio Shack antenna numbers. But we cannot find this exact number (21-929)in any Radio Shack Archive on-line. Anyone have an idea what this antenna is supposed to be? It appears to be a yagi but we have no other information on it. We would like to find an instruction manual to tell us how to put it together.
Thanks for any help you can send. Please email me direct to: KE5GFJ@centramedia.net.
John KE5GFJ
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W0KAN
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Posts: 9




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« Reply #1 on: September 06, 2012, 02:09:29 PM »

1972 Radio Shack catalog - page 18.

http://www.radioshackcatalogs.com/catalogs/1972-b/

5 element - 24 foot boom.

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AD5ZC
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Posts: 73




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« Reply #2 on: September 06, 2012, 03:56:40 PM »

That would make a heck of a 10 meter beam with a little retuning!
Nice find!!
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HS0ZJU
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Posts: 163




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« Reply #3 on: September 06, 2012, 06:57:51 PM »

Those catalogs are great to look back at...
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KA0CSU
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Posts: 4




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« Reply #4 on: September 06, 2012, 07:03:58 PM »

 I belive that antenna was built buy Hygain , but sold under the radio shack brand .   Hygain called them Long John .   for the manual , do a search on the Hygain Long John 5 element CB antenna and i bet you will find it will be the same as the radio shack antenna .  If you want to use it on 10 meters , search for the Hygain 5 element 10 meter manual . these antennas are great ! have a freind who has a 10 , 15 & 20 meter
 Hygain 5 element mono banders stacked above each other & working DX is not a problem .
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W9GB
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Posts: 2659




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« Reply #5 on: September 06, 2012, 07:56:33 PM »

Here is the Hy-Gain LJ-105CA 5-element 10-meter antenna manual.
This manual also has the stacking information (10, 15, 20 meter LongJohn)
http://www.hy-gain.com/pdffiles/LJ-105CA.pdf

The LJ-105CA is a current production Hy-Gain / MFJ antenna.
http://www.hy-gain.com/Product.php?productid=LJ-105CA

USE the measurements in Hy-Gain manual, rotate to horizontal polarization,
should be a nice antenna for 10-meters.

BTW, double-check the assembly hardware.  
In the 1960s and 1970s many antenna mfg. did not use stainless steel assembly hardware.
Assemble with SS hardware and anti-corrosion product it will last for years.

w9gb
« Last Edit: September 06, 2012, 08:17:45 PM by W9GB » Logged
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