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Author Topic: SO-239 to 3/8" adapter?  (Read 5121 times)
KC8MWG
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Posts: 447




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« on: November 06, 2015, 09:38:33 AM »

I have the opportunity to get one of the Opek multi-band (2m-80m) mobile antennas cheap. Only problem is, it has an SO-239 connector and my mount is meant for 3/8" antennas. I have seen NMO to 3/8, and SO-239 to NMO, etc. but it seems silly to have a stack of adapters. Right now I have a "pigeon nest" on my car - a Hustler mast with a tri-band adapter and 20m, 40m, and 75m coils. Don't have $300-$400 plus for a screwdriver. The Opek appeals because of its compact nature, though I'd have to switch the jumper around to change bands (I have an LDG AT-11 for tuning, so SWR vs. bandwidth isn't a huge problem, though obviously not the most efficient set-up).
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G8YMW
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Posts: 750




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« Reply #1 on: November 06, 2015, 10:02:30 AM »

I think you're going to be unlucky, the 3/8 fitting has only the coax centre core attatched (the braid is connected to the bodywork) The SO239 needs both sides of the coax.
If it was the other way round, there are plenty of adapters available
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73 de Tony
Windows 10:  Making me profane since March 2017
KC8MWG
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Posts: 447




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« Reply #2 on: November 06, 2015, 11:11:09 AM »

Not worthwhile, then. Price dollar-wise is attractive but not worth the PITA of finding or attempting to make an adapter. Oh, well. I can still use my Hustler "pigeon nest" for 3 bands - possibly 4 (I have heard you can sometimes tune up on 15m with a 40m antenna - I'll have to see how well my AT-11 does on that. Efficiency will likely suck, but then my antenna isn't the most efficient anyway...). But then, my elmer used to use an 80m hamstick on all bands with an Icom automatic tuner and his IC-706 MkIIG in his Jeep, and seemed to be happy with it.
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W4KVW
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« Reply #3 on: November 17, 2015, 04:27:51 PM »

http://www.ebay.co.uk/itm/SO239-PL259-to-3-8-ANTENNA-AERIAL-ADAPTOR-FOR-AMATEUR-HAM-CB-RADIO-/390749112097 They make them but can these be found in the USA?  Huh http://www.thunderpole.co.uk/mounting-accessories/sirio-so239-38-adaptor.html

Clayton
W4KVW
« Last Edit: November 17, 2015, 04:31:08 PM by W4KVW » Logged
G8YMW
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Posts: 750




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« Reply #4 on: November 17, 2015, 05:28:20 PM »


Wrong way round Clayton
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73 de Tony
Windows 10:  Making me profane since March 2017
K5TED
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Posts: 229




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« Reply #5 on: November 17, 2015, 07:11:55 PM »

What 'mount' are we talking here?

If you want simple for a mirror or gutter mount, buy a SO239 bulkhead piece about 2" long and bore your mount hole out.

OR.........

Buy a simple SO239 to 3/8 x 24 adaptor, commonly known as a 'mirror mount' adaptor, and flip it upside down.





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ZENKI
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Posts: 1621




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« Reply #6 on: November 20, 2015, 05:59:21 PM »

https://breedlovemounts.com/

3/8 UNF if you making your own. 3/8unf  bolts can be very hard to find in a metric world!
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