[R-390] Mechanical filter Alignment

[Roger Ruszkowski]

Thanks Roger,
   I appreciate the tips. I am trying to track down why it distorts on 
very strong signals. It's as if the AGC isn't fast enough on the Attack 
time.
Perhaps my C551 is Bad. I seem to have read some where that the AGC 
is/can be a problem on the 390A receivers.

73,
Gordon
N6WK

Gordon,

In my 25 words or less, the AGC has always been wanting.
Your problem sounds normal.

the Operator solution was to back off the RF gain  as needed.

We need to pass this back to Les, and Tisha.

There  have been a number of recommended resistor cap changes
in the AGC circuit to change the action on specific stages in terms of stage gain 
for a given AGC voltage.

There is another set of changes to adjust the attack and decay times.

These are all subjective values to get a sound you like.

Roger AI4NI