[Elecraft] Serial 3000+ K2: AGC threshold setting

Wed Jan 22 12:48:00 2003

Hi

I am currently building two K2's. I just checked the setting of R1 on the
control boards after calibration and both pots are at about 1/2 of the
rotation. I had no problems making this adjustment. Are you sure RP6 is 5.1K
and R1 is a 50K pot. That's about all that can be wrong unless it's a bad
connection somewhere.

Don Brown
KD5NDB

----- Original Message -----
From: "Wallace, Andy" <[email protected]>
To: "'Elecraft'" <[email protected]>
Sent: Wednesday, January 22, 2003 11:30 AM
Subject: [Elecraft] Serial 3000+ K2: AGC threshold setting

> Hi, Folks. Quick question to the K2 3000+ owners:
> Did you have trouble setting the AGC threshold? This
> was done with R1 on the Control Board, measuring at
> U2 pin 5. Manual recommends 3.9V. I could only get
> mine to 3.8V and that was with R1 fully counter-clockwise
> as viewed facing the pot. Did so with RF gain fully
> clockwise. 8A regulated line is 7.99V on my meter.
> Leaving it at 3.8, I was able to do the S meter calibration
> for zero and full-scale ok.
>
> Circuit is pretty simple -- RP6 is pretty much it! -- so
> I am wondering what is up. I checked my work and all seems
> OK, but will scrutinize more when I can get back to it.
>
> Andy
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