[Elecraft] AGC Mod Query

[n2fq]

Hello everyone.

Awhile back there was some mail about the AGC Mod on the K2.
Specifically, adjusting R1 on the Control board.

My K2 had a fixed resistor so I replaced it with a 20 turn
50k one. I also followed the write up about how to adjust it
for apparent equal noise with AGC ON/OFF.

Worked like a charm and the final voltage on U2 pin 5 turn out
to be 3.37vdc.

The audio coming out the speaker booms now, BUT
the RF control is not as effective as it used to be.
Namely, I like to turn down the RF to lessen
the background noise. Now I can turn
the RF all the way ccw and see no apparent
reduction in background noise.

So I'm going back into the rig and play with it.

My question is this: Did I make a too aggressive
change on R1?

tnx.

-- 

73
Fernando N2FQ/NNNØJYM 
San Jose, CA
<http://pages.sbcglobal.net/n2fq>