[Elecraft] RE: K2 receiver problem - AGC alignment, CAL S LO/HI

[Don Wilhelm]

Gerhardt,

If you still have a difference between AGC on and off at 3.65 volts or
lower, I would hesitate to go further, but you certainly can try it and see
what happens - no real harm will come from a lower threshold voltage.

After setting the threshold, then adjust CAL S LO first and then CAL S HI
(the order is important, they interact).  It is not unusual to have to do
these several times in succession to get it correct.  The low S meter
response may vary with the filter width and mode, so check all modes with
the widest filter for each mode.

73,
Don W3FPR

> -----Original Message-----
>
> Hi list,
> hi all those who answered my first question.
>
> I had 4V at Pin5 U2. So I replaced R1 with a pot of 50k and set
> it to 3.65,
> 3.72 and 3.8V. It got better for sure. The difference between AGC
> on and off
> is in all cases noticable, but slightly. But I think it's significant,
> because...
>
> When I CAL S LO and exit it then immediately 1-2 bars of the s-meter start
> lighting. So I guess AGC sets in. And this should not be the
> case, I guess?
> Any idea?
>
> Have a nice day,
>
> Gerhard
>
>