[Elecraft] KPA100 power output fixed

Nick Frost Nick Frost" <[email protected]
Sat Jan 4 01:39:00 2003


Recently I wrote asking for help with a KPA100
that put out either 5 watts or 100 watts and would
not vary the output.  From 0-10 watts LCD setting,
the KPA100 was outputting 5 watts on the meter 
and jumped to 100 watts at the 11 watts setting.
I fixed the problem by re-winding
T4 which I had initially wound correctly but may have
connected incorrectly, *AND* by following 
Gary Surrency and Tom Hammond's
excellent suggestions which are: turn off the PA and remove
the high-current power supply.  Use the low-current
power supply into the K2 and do the power calibration
with 5-15 watts and when finished, then turn on the PA
with high-current and see if the power on your wattmeter
reflects the applied setting on the LCD/power knob as
you vary the power setting.  This worked for me, now the KPA100
varies the output power from 5 to 100 watts.  So, many 
thanks to Gary and N0SS for their help, and for all 
of you on this list and for your posts.   I wanted
to document it here for others who might be searching
to resolve this problem.  Thank you!
-Nick KD5QEF