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
>
>
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