I yelled for help too soon. When checking around with a scope I found that
my Astron linear power supply has failed. The K3 is healthy.
Don K7FJ
Starting with my first qso after loading Beta 2.10 last week my K3 shut
down (turned off) unexpectedly in the middle of an SSB qso while I was
transmitting at about 60 watts PEP out. Later I was able, after several
failed attempts, to turn it on again and now, a few days later, it is
happening again. Now, though, it looks like a hard failure. Any attempt
to transmit at over about 30 watts out results in shutdown. This occurs
on both 160 and 80 meters. I have not tried other bands.
The symptoms are that indicated peak output power is is about three times
the specified amount. At around 40 watts commanded actual power is up to
over 120 watts and that is about the level where shutdown occurs. As I
write this the K3 is in CW mode on 80 meters connected to a 50 ohm dummy
load. The output power is set to 30 watts and when I press the TUNE
button actual output power indicated by an external meter (average, not
peak mode) shows a power of 30 watts varying 1 or 2 watts plus and minus.
When switched to peak mode the external wattmeter indicates 70 watts.
The input current is varying from 6 to 13 amps as indicated on the K3
digital display, and the SWR indication on the display is flashing 1.0 - 1
on and off at an uneven rate and the RF output indication on the K3
display is 70 watts but also flashing and jittering.
This started with FW beta 2.10 and I hope that is the problem but I'm
worried that it might be something more serious.
I have made no changes to settings recently.
HELP!
Don K7FJ
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