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Old 05-03-2008, 14:31   #1
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Quad-helix antenna for satcom weather fax?

I'm hoping I don't have to build my own, as I can't seem to find a decent quality quadrifilar helix antenna to use for receiving 137 MHz weather fax info from polar satellites. There's ton's of information on building your own, but I was hoping to find one similar to this one from National RF, or this one from Time-Step in the UK.

National-RF's antenna seems to be no better than a typical homebrew, and I'm waiting to hear back from Time-Step. I think OCENS at one time offered a quad-helix as part of their weather receiver package, but I can't seem to find recent info on it.

I'm planning to use it as a backup to HF weatherfax info... I'm not ready to break out the big bucks for a satphone with data capabilities just yet!
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Old 05-03-2008, 15:34   #2
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Honestly, that looks like a very simple antenna to build. A few wire coathangers a bit of pvc pipe, a balun, a couple of hours of work and you've got yourself an antenna.
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Old 06-03-2008, 11:16   #3
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Originally Posted by sluissa View Post
Honestly, that looks like a very simple antenna to build. A few wire coathangers a bit of pvc pipe, a balun, a couple of hours of work and you've got yourself an antenna.
You may be right, but right now I'm busier than the proverbial one-armed paper hanger trying to get the boat ready to move aboard by May. If I were to take the time to do it, I'd build it from copper tubing - a bit more robust than coathanger wire... I did hear back from one other vendor - and for $385, I think I will do just that: build it once I have some time. I know I can do a better job than the cheap homebrew-looking one from National RF...
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