On 9/9/2014 4:51 PM, Carter wrote:
If the *noise* is "noticeable[y] quieter, 1 to 2 S units", wouldn't
the wanted *signal* also be down 1 to 2 S units?
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Hi Carter --
I liked you question, and ponder... suggest... er... just thinking out
loud...
I wonder if the important or operative concept is "signal-to-noise"
ratio. Consider Beverage antennas. They have much weaker signals, but
also much lower noise factors, and make great receiving antennas. I
suspect (i.e., guess) some thing similar is happening in Bob's case.
A tentative theory: (i.e., wild guess) = If BOTH signal and noise
are reduced, then the resulting signal seems stronger compared to the
noise. Say, you have a signal level of of 8 S-units and a noise factor
of 5 S-units, then you have a ratio of 1.6; but lowering each by three
S-units, assuming some sort of linearity between the two, you get a
ratio of 2.5, so the signal level seems stronger relative to noise level.
OK, Maybe it just seems that way. I am sure there is a mathematical or
electrical fallacy lurking in the weeds, and I recall Jim Brown trying
to explain a similar fallacy regarding the effects of the RF-GAIIN
control... which I am still trying to wrap my head around... But I have
not forgotten it... so, at least it SEEMS OR APPEARS to have a better
signal to noise ratio, (remember the Beverage antenna seems to work this
way) and that would be an advantage.
OK... just a stab in the dark, the usual disclaimers apply.
------------------ K8JHR
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