[Elecraft] AGC adjustment

[k6se@juno.com]

Dave, KK7SS wrote:

"Are you saying 3.8v with no antenna and the AGC OFF? or, No antenna, AGC
ON, adjust for no difference in noise floor when switching the AGC
ON/OFF??"
==========
No antenna, AGC ON, and adjust for no difference in the noise level when
switching the AGC ON/OFF sounds to me like the way to do it.

My K2 is before #3000 and R1 is a fixed resistor, so until I change it to
a pot, "adjusting" it means replacing it with a different fixed value.

When I do change R1 to a pot, I plan to use a 100k pot because the 51k
(original), 42k and 33k values I have tried have all successively
resulted in more S-meter sensitivity, but with successively greater noise
change between AGC ON/OFF (with more noise when the AGC is OFF).  It
appears that R1  in my K2 will have to be greater than 51k to have the
no-signal receiver gain at full tilt with the AGC ON (no noise change
between AGC ON/OFF).

Wayne is the expert, and I'm anxious to see what his new adjustment
procedure for R1 will be.

73, de Earl, K6SE