[Elecraft] K3 / RF gain - S meter issue - Similar issue

[Wes Stewart]

I've done a little playing around with this.  I made some measurements, using my 
"old" K3, of the HAC1 voltage (applied to the FET i-f amp) vs. the RFG value 
just to see if I could see the "correction" Lyle spoke of.  It's a 
semi-interesting plot that I tried to post on the K3 Yahoo group. Unfortunately, 
I have a hard time describing Yahoo groups without resorting to swear words, and 
I couldn't accomplish the task. Someday, if I have the K3S out of the station 
line up, I'll repeat the measurements.

Wes

On 12/14/2017 8:57 PM, Al Lorona wrote:
> You said, "In my opinion based on inspection of the schematic, the issue resides in the fet
> post-filter amplifier that is controlled by the "hardware" AGC (and manual "RF"
> gain control)."
>
> You were making a relationship between hardware AGC and the loose spec of the FET in question. By saying that, I understood you to mean that the hardware AGC signal was being interpreted differently by the problem K3 compared to a 'normal' K3 because of this FET. At least this is what it seemed like. I will accept that I misunderstood you and that I have no idea what you were trying to say.
>
> Al  W6LX