[Antennas] B&W TTFD

Mon Sep 6 11:17:53 EDT 2004

And that, Harvey, is precisely the environment I had in mind when making
that statement: a strong local noise field. These antennas are widely used
at Embassies, for example, and some military facilities which are generally
located in urban centers. Local noise! [g] Out in a jungle environment
where receiving conditions are "good" I agree that S/N is not a
performance-determining factor.
And my background is about as far from VHF/UHF as you could expect to find!
[g]
73, George W5YR
Fairview, TX
w5yr at att.net
http://www.w5yr.com
----- Original Message ----- 
From: "Harvey&Bessie" <w4tg at bellsouth.net>
To: "George, W5YR" <w5yr at att.net>
Cc: <whitaker at ieee.org>; <antennas at mailman.qth.net>
Sent: Monday, September 06, 2004 12:55 PM
Subject: Re: [Antennas] B&W TTFD
> That's a normal question from one who is "brought up" in VHF, UHF
environment. However on
> HF you will find most of the noise is from external sources and it (noise)
will suffer the
> same attenuation as the signal, therefore the S/N ratio will remain the
same, even with a
> lossy antenna! So we don't worry about that factor. What we do try to do
with good HF
> antenna design is to avoid placing the antenna in a location where noise
pick-up is likely
> to be higher than usual.
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