[TowerTalk] perspective

[wa4dou@juno.com]

Yuri,
  A db is a db whether you're talking about a signal that is S-9+ or if
you're talking about a signal in the noise. The apparent change is no
different at either end of the scale. I db rarely if ever makes a signal
readable if it was not so before. 1 db NEVER produces a 5 db change at
the other end. 73 Roy WA4DOU
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On Wed, 19 Jul 2000 19:31:40 EDT K3BU@aol.com writes:
> 
> In a message dated 7/19/2000 4:26:58 PM Eastern Daylight Time, 
> w8ji@contesting.com writes:
> 
> > When 
> >  receiving at HF, gain doesn't matter. The antenna pattern and the 
> 
> >  direction of unwanted and wanted signals is all that matters.
> 
> 
> Not true. It matters! 
> I had many instances when Razors were hearing stuff when others 
> couldn't make 
> a whisper out of signals. Clean pattern helps S/N and QRM, but if 
> there ain't 
> no signal brought by antenna, there ain't no amplifier that can 
> amplify it.
> 
> One more monkey wrench into philosophy that paths are reciprocal and 
> can be 
> nicely calculated (N6BT touches up on it in July QST p. 48): 1 or 3 
> dB can 
> make a difference in getting the signal into the layer or duct and 
> propagating it. Sometimes 1 dB can demonstrate itself as 5 or more 
> dB at the 
> other end. It ain't exactly linear. (I know about RX S-meters being 
> all over.)
> 
> Those with stacks try switching them and compare results on RX and 
> TX. You 
> might be surprised how much difference there is between RX and TX 
> signal 
> reports, I found more like 60% disagreement.
> 
> So much fun, so few antennas! 
> or
> Contester will never have enough antennas.
> 
> Yuri, K3BU
> 
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