[Elecraft] K2 AGC Threshold Adjustment

Jim Stoneback jstonebk at shentel.net
Mon Oct 8 14:53:36 EDT 2007


Hi,

When I built my K2/100 the threshold adjustment didn't go right, I turn 
trimmer R1 full CCW to get 3.74v on pin5 of U2 (full CW pin 5 goes to 2.6v). 
This adjustment is supposed to swing U2 pin 5 fom from 4 to 8 v.  I checked 
diode polarity, resistor values, everything but never did find the problem.

Now I'm building another K2 and have encountered exactly the same result. 
Anybody got a clue?

73,

Jim
Jim Stoneback
K4AXF
Drake SW8
K2.ssb.100 sn 6194
K2 sn 6263 (underway) 



More information about the Elecraft mailing list