Re: KPA500 suddenly low output - only 30 watts

Posted by Ian Kahn, KM4IK on Mar 15, 2015; 5:41pm
URL: http://elecraft.85.s1.nabble.com/KPA500-suddenly-low-output-only-30-watts-tp7600292p7600295.html

Mike,

I recently had a similar problem with my KPA500. A couple of components in
the low frequency T/R filter blew out. The amp made a trip back to the
Watsonville. I suggest checking with Elecraft support on this issue.

Hope this helps.

73 de,

--Ian
Ian Kahn, KM4IK
Roswell, GA  EM74ua
[hidden email]
Please join me in the Georgia QSO Party April 11-12, 2015.  Info at
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10-10 #74624, North Georgia Chapter #2038
PODXS 070 #1962
K3# 281, P3 #688, KAT500 #860, KPA500 #1468

-----Original Message-----
From: Elecraft [mailto:[hidden email]] On Behalf Of mike
Sent: Sunday, March 15, 2015 1:02 PM
To: [hidden email]
Subject: [Elecraft] KPA500 suddenly low output - only 30 watts

I was on a net this morning thinking I had my amp on (it did show OPER),
however I found it was only putting out 30 watts. Moving to STBY I was
putting out 95 watts with the K3 alone, but in OPER the KPA500 only put out
30. My per band setting showed the normal 24 watts (with the asterisk) but
instead of 500w I was only getting 30 watts. I increased the K3 output to
70w and the KPA500 output increased to 50 watts.

I recently upgraded to 5.14 FW on the K3 and forgot to do the 50 watt
calibration. I did go ahead on run the calibration just now, but the low
KPA500 output remains the same.

Nothing else has changed.

Any suggestions? 73  ..mike  AI6II





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