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When Were You First Licensed? »
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Splitpair
Premium
join:2000-07-29
Cow Towne
reply to kewlkeed
Re: Max coax length for HF?

Another possibility is if you are really concerned about loss would be to place a wideband pre-amp at the antenna and using two antenna relays by-pass it on transmit.

Wayne


GeekGirl1
The Medium IS the Message
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join:2007-01-28
Morrisville, PA
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edit:
March 24th, @09:34PM

I'd worry about intermod / inteference from a wideband pre-amp without any way to take it out of line when not needed. More complicated setup - you need a power supply and a way to tell the difference between a dead preamp and no signal due to no band activity.

At HF, the atmospheric noise is so high, you don't really care about loss as much as problems due to front-end overload. IOW, 3rd order intercept instead of noise figure. At UHF and higher, it's the other way around.

I'd take the loss of a long coax run. Just use a higher gain antenna...
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