Posted by
Darwin, Keith on
Mar 06, 2009; 12:56pm
URL: http://elecraft.85.s1.nabble.com/AGC-tp2435434p2435493.html
Since AGC automatically turns down the gain when there is a big signal,
I'd expect that it would make things quiet. Basically, it adjusts the
gain to equalize all signals. Band noise, weak signals, strong signals
- all are rendered at the same volume level as they come out the
speaker. Turn AGC off and the quiet stuff remains quiet while the loud
stuff gets much louder. Overall S/N ratio goes way up.
I run my rig with a combination of AGC on/off. I turn AGC on (to squash
any loud peaks) then back RF gain down until the noise background gets
weak. Now I have a higher average S/N ratio but still have the
ear-protection benefits of AGC.
- Keith N1AS -
- K3 711 -
-----Original Message-----
From:
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[mailto:
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Sent: Friday, March 06, 2009 7:43 AM
To:
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Subject: [Elecraft] [K3] AGC
Hello Folks,
Just talking to a friend that has a K3 also and he was asking why the
signal gets louder with less noise when you turn off the "AGC" ? I
turned off tha agc when working a weak DX station, and he was right.
Made the copy easier and much louder. What is the technical reason for
this?
Don..w2xb
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