Jonathan,
The normal cause of that HiCur message is a failure in the wattmeter of
the KPA100. Re-alignment will not help.
To test for that possibility set the power knob for about 50 watts,
connect an external wattmeter and a dummy load. Then go Keydown and see
what the actual power output is. If it is in excess of 100 watts, then
that is proof that the KPA100 wattmeter has a problem.
The most common cause is that the diodes D16 and D17 have been damaged
by static from the feedline, so replacing D16 and D17 is the first step
in attempting to correct the problem. Check again for actual power
output with the power set for 50 watts after replacing those diodes.
If you still have a problem after replacing those diodes, I can help
with further troubleshooting.
73,
Don W3FPR
On 1/3/2020 9:15 AM, Jonathan Taylor, K1RFD wrote:
K2 #2462
I just upgraded the KPA100 from Rev A to Rev D, and installed the
upgraded shield, under the philosophy of "better late than never" :)
I am noticing two problems, when connected to a 50-ohm dummy load:
1) In TUNE, the display briefly shows "Hi Cur", followed by a strange
power/SWR indication such as "7 5.0-1"
2) At any setting above 10W, the Power knob seems to have no effect --
the wattmeter always reads approximately 100W output. This is true
both in TUNE and in CW.
The actual power output appears to be about 100W, when measured with
an external wattmeter (although a bit low on 10M).
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