[TenTec] Eagle Tuner

[Richards]

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?

___________________________________________________


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 
------------------------------------------------------