[TenTec] RF Gain and AGC Question

[Bob McGraw - K4TAX]

I love these kind of questions.

AVC and AGC are generally used today "generically" although maybe not 
technically correct.  However they are far from the same.

The AGC is "automatic gain control" which serves to control or adjust the 
internal gain of the RF stages and IF stages.  This is basically what is 
seen as action on the S meter.  Now, AVC is "automatic volume control" an in 
the original form was indeed a method where the audio volume was 
automatically controlled.  Today, we might equate this to limiting or 
compression of the audio signal.

In current practice, AGC is incorporated in most all receivers while AVC is 
found in few if any.

73
Bob, K4TAX


----- Original Message ----- 
From: "Bruce Warner" <kansas4000 at hotmail.com>
To: <tentec at contesting.com>
Sent: Wednesday, January 28, 2009 2:52 PM
Subject: [TenTec] RF Gain and AGC Question



Hi - just a follow up - I appreciate the advice and wanted to just ask on 
Walt's advice versus Carter's.  Walt indicated to make sure the AGC on/off 
button is in the OUT position (meaning it's off - with the inference that 
it's best to not use the AGC on the rig).  Then Carter, you said follow 
Walt's advice and make sure the AVC is on.  Possibly a dumb question here 
but is AGC the same thing as the AVC?  Is the recommendation from you both 
to just leave the AGC button in the out (or off) position?

Thanks guys.

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