[Elecraft] K2 AGC Threshold Setting

[Don Wilhelm]

Ken,

The problem is caused by the 8 volt regulator being on the low side of 
its specification (the spec sheet says 7.5 to 8.5 volts is OK output for 
the regulator - and the current batch of regulators at Aptos seem to be 
on the low side (they were mostly on the high side a couple years ago - 
but I digress).

Measure the actual voltage of your 8 volt regulator, and calculate 45% 
of that reading.  Set the AGC Threshold to that value and all will be well.

73,
Don W3FPR

Ken Mohler wrote:
> OK guys, now I need some guidance.  I'm building K2 serial number 6625.  I
> am on page 48 on the manual, Setting the AGC Threshold.  I have the RF GAIN
> control fully clockwise.  The highest voltage reading I can get on pin 5 of
> U2 while adjusting R1 is 3.65V.  The manual calls for 3.80V.  All tests up
> to this point have been completed successfully.  Any ideas or suggestions?
>
> Your help is appreciated.
>
> Ken
> K0WKM
>   
>