Vic. K2VCO wrote
I wonder if it has to do with exciters which tend to produce power
spikes at the beginning of CW characters or syllables. That would
explain why some have the problem and some don't.
++++++++++++++++++++++++++++++++++++++++++++++++++++++
I used two different transceivers--Icom 746 and 756Pro, No difference, More
significantly, I NEVER used the amp on CW, so I don't think spikes are the
issue. I also checked line voltage and set the transformer jumpers
appropriately.
What I found to be really strange was that I could operate normally, shut
off the amp, and then find that the next time I powered up, the receive was
dead and the fuse blown. My whole station is well grounded (the shack is at
ground (no pun intended) level, and grounded to two 8-foot copper rods via
short
runs (straight thru the wall) of 1/2 inch copper braid) so I don't think
there could be any sort of static charge developing.
Except for this problem, it was a fine amp--required low drive for full
legal limit, tuned smoothly and reproducibly on all HF bands (except never used
it on 30 or 160), and looked good. A TV in the shack (about 60 feet
horizontally from the tower) NEVER showed any video/audio effects. But to me,
it's a
fatal flaw!
73
Sam, AA3VD
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