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On Sat, 10 Feb 2007 08:35:55 -0800, Bob wrote:
To keep it simple, a T2FD type antenna would not require any tuning or thought, just plug in and talk. B&W makes a commercial T2FD style, model BWD-90. I know someone will chime in and say these are crap but they work just fine and I believe a slight trade off in performance for ease of use is paramount for the situation you describe. Good morning, Bob. Yeah, good luck with that. T2FD antennas can exhibit as much as 17 db of loss while maintaining a decent VSWR. I have run communications tests with another amateur who lives one town away. We have similar grounds, similar HAAT, and similar height AMSL. He uses a B&W T2FD antenna (I believe it's the B&W-90) and I use a cut dipole for 75 meters, at comparable heights (mine is 17 feet high and his is something like 25 feet I think). He runs 100 watts and I run a grand total of FIVE (5) watts with a Yaesu FT-817. I often get BETTER signal reports on 75 meters than he does, from stations within about a 100 mile radius of here. I certainly wouldn't want a T2FD antenna for mission-critical use, especially since for the price of a B&W, you could buy an auto-tuner from LDG and have just about enough money left over to cover the materials for a cut dipole. |
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