Jeff,
I have never encountered an intermittent diode, but of course soldering
problems can create an intermittent. Also, you might have an
oscillation that is creating that behavior - it is difficult to say if
you are only looking at the output power - the actual frequency of the
output would reveal whether it is a parasitic oscillation or just a
power control intermittent.
One of the clues is that a parasitic oscillation will usually not show
up when working into a dummy load because the dummy load is not
frequency sensitive - when working into an antenna and/or an antenna
tuner, a parasitic will show up with a high SWR indication because the
load is frequency sensitive.
If your KPA100 was purchased before Nov 2006, it does not have the newer
T/R switch design, and you should upgrade it with KPA100UPKT. If you
have already done that, be certain that C31 was changed to a 0.22 uF
capacitor with the upgrade. The upgrade kit does not contain the new
capacitor for C31 - you must request one separately from
[EMAIL PROTECTED] There are steps in process to include the new C31
with the KPA100UPKT, but it is not yet complete.
73,
Don W3FPR
Jeff Kinzli N6GQ wrote:
Don, would this behavior (of zapped wattmeter diodes) be intermittant,
or constant? I have been chasing an intermittant high-output and
erratic output problem for a while...just wondering if this might be
my problem? Are these diodes particularly ESD-sensitive?
Thanks,
Jeff N6GQ
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