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On Sep 29, 8:31 pm, Bill Horne wrote:
I've been using an inverted vee for 80 meters, with mediocre results. What sort of inverted V and what sort of results? (Coax fed, how high are the center and the ends, what's the angle of the V?) 1. Performance? 2. Is noise worse/better/the same? 3. Is a quarter-wave radiator essential, or can it be shorter? 4. Loading/tuning? I don't have much experience with 80 meter verticals but I do know these basics: 1) A full-size one is 60-65 feet tall, and needs a ground system to match. Shortening sacrifices bandwidth and radiation efficiency. Yes, a lot can be done with a small antenna but you're looking for something better than the inverted V. 2) Verticals tend to be noisier, particularly on the lower bands. This is why you will see 160 and 80 meter DXers and contesters using verticals for transmitting and Beverages or other low-noise antennas for receiving. 3) A vertical will give you low-angle radiation, which is great for DX when the band is open, and good for local (few dozen miles) anytime, but for the typical ragchew 50 to 1000 miles or so it can be disappointing. 4) A decent inverted V can do a good job as an all-around antenna. I've used a homebrew 80/40 coax fed trap inverted V with 100 watts for years, and had many excellent QSOs with it on 80. Center at about 40 feet, ends about 15 feet, transcontinental and transatlantic QSOs common if I stay up late enough. Many, many contest QSOs too. Not a worldbeater but not a problem either. 73 de Jim, N2EY |
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