DW,
Check the 8 volt regulator output (ControlBoard U4 upper leg). If that
is less than 7.6 volts, you may want to replace the regulator. It may
help with both problems. BUT if your 8 volt regulator output is OK,
then you should look for the component(s) that have the wrong value.
73,
Don W3FPR
DW Holtman wrote:
Hello,
I'm in the middle of building a K2, S/N 6412.
I have a couple of questions, hopefully some of the knowledgeable
Elecraft people on this forum can help.
While doing the Alignment and test Part 1, I had a couple of readings
that were not in specs.
1. Page 48, Setting the AGC Threshold, the manuals calls for
adjusting R-1 for a reading of 3.80VDC on pin 5 of U2. The highest R1
would adjust to is 3.60VDC.
2. Page 48 Bargraph Current test. The manual calls for a current
reading of 0.16 to 0.18. My K2 reads 0.25 amps. That is quite a bit
higher than what is called for.
Any suggestions? Are these readings anything to worry about?
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