I just repaired an early K3 belonging to my brother. When I got
finished, I noted that his passband centering control (left knob) was
inoperative on CW. My immediate thought was that maybe the encoder was
NG, but it worked fine for SSB. Someone else had a similar problem
recently and he re initialized his radio. I asked my bro how long this
problem had gone on and he said "Maybe a year or two?" I checked the K3
UTIL files on my computer and I found an old file for his K3 dated 2016
so I downloaded it and the problem went away and I did not have to go
and re enter everything. It was a quick fix and rather painless. My
brother said that he had not altered much from the factory settings
anyway, but it was nice not having to check filter offsets etc. So all
this work got me to dig out my Cady K3 book and read it as nightime
reading before I fall asleep. There are so many interesting things that
you can do to your K3, that it makes my head swim in total confusion! I
am sure the K4 will be mind boggling! My 1939 Bendix RA-10 aircraft
receiver has Volume, Tuning, BFO, and Band change knobs. I seem to
handle that OK.
This past weekend, I used one of my own K3s in the WPX contest on 75
meter phone and made a few 100 watt QSOs during the daytime. ( I have
made only a handful of 80/75M contacts) I noticed that there was a
terrible noise occupying about 15 kHz of the band, but it showed up on
the P3 as occupying the entire 200 kHz passband. I checked PLL voltages
using the DISP button and saw that the old style synthesizer was falling
out of lock. I had to perform a synthesizer CAL. Then all was well
again. I was reminded that I had not upgraded the synthesizers in this
radio!
73
Dave K1WHS
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