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Author Topic: FM Antenna for Drive-In Theatre Barry Floyd Phenomenal Film Handler Posts: 1079 From: Lebanon, Tennessee, USA Registered: Mar 2000 posted 07-01-2003 05:14 PM                        I've got a Broadcast Warehouse TX-5 transmitter with a type "N" 50 ohm connector on the rear for connecting the antenna. I've also got a Ramsey "True Match" FM antenna that I built as a kit. I don't have a clue what type of impedance level this antenna has. Are these two compatible?  |  IP: Logged John Hawkinson Film God Posts: 2273 From: Cambridge, MA, USA Registered: Feb 2002 posted 07-01-2003 06:21 PM                     Pretty much all broadcast RF is 50-ohm. --jhawk  |  IP: Logged Chris Erwin Expert Film Handler Posts: 195 From: Olive Hill,KY Registered: Oct 1999 posted 07-01-2003 07:50 PM                     Barry, Did you get your TX at Progressive? If so they sale a great 5/8 wave antenna that is small, non-obtrusive, and does a mean job! I'd look in to it. I think it's under $100. E-mail me if you need the specs and I'll look up my stuff. --Chris  |  IP: Logged Josh Jones Redhat Posts: 1207 From: Plano, TX Registered: Apr 2000 posted 07-01-2003 10:24 PM                        All broadcast stuff is indeed 50 ohm out. The antenna you are talking about would do just fine. If all else fails you can find plans on the net for a J-pole antenna that you can construct from copper plumbing pipe for around $15. Here are some links. a cool calculator and design can be found here>> Jpole calculator Josh  |  IP: Logged Ken Layton Phenomenal Film Handler Posts: 1452 From: Olympia, Wash. USA Registered: Sep 1999 posted 07-01-2003 11:53 PM                     I'd say go ahead and use the Ramsey antenna.  |  IP: Logged Barry Floyd Phenomenal Film Handler Posts: 1079 From: Lebanon, Tennessee, USA Registered: Mar 2000 posted 07-02-2003 09:57 AM                        Thanks guys, I was hoping this would be the answer. I'll just need to make a quick trip to Radio Shack and find an adapter for the fittings.  |  IP: Logged

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