After performing flawlessly for over a year my KPA100 has died for the second
time in about 3 months. I was finishing a nice 20 minute QSO on 10M CW last
week when the rig's lights flickered and the power supply shut down. Now
the power cord fuses blow and there appears to be a short when the po
gt;
To:
Sent: Monday, July 07, 2008 4:24 PM
Subject: [Elecraft] K2 - KPA100 down again
After performing flawlessly for over a year my KPA100 has died for the
second
time in about 3 months. I was finishing a nice 20 minute QSO on 10M CW
last
week when the rig's lights flickered and the po
Bill,
Remove the shield and give it a good visual inspection first - look for
any evidence of overheated components.
Then check the diodes in the T/R switch - preferably with a diode test
function of a DMM, but the ohmmeter will work too - check both the
forward and reverse connections.
Check
Thanks Don,
I checked the diodes and D12 and D14 in the switching circuit tested bad
along with D10 in the 12V line. However when I took them out they all
tested OK. I replaced them with new and now D12 and D14 tst OK in circuit
but D10 still shows bad but is OK once taken out of circuit. Needl
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