I said:
"I have the following amplifiers: an Alpha 76PA (using 3CX800A7 tubes), an
Alpha 76A, an Alpha 86, a home built 4-1000, a home built 3-1000, a Henry
amp (I forgot the numbers), an Alpha 77SX, a Collins 30L-1, and a Swan Mk
II. None of them use nichrome parasitic suppressors.
Rich said:
" But the 30S-1 reportedly did."
Reply:
Rich, the problem with getting old and having a number of amplifiers is that
I sometimes forget what I have. My wife claims I have too much stuff. But
your comment reminded me that I do have a Collins 30S-1 amplifier. It does
not have parasitic suppressors. It has never had a problem with parasitics.
The only problem it had was when Fedex dropped it from enough height to
totally bend the frame and require a new cabinet. I think it was dropped
from a truck. I have not heard of any problems with parasitics in the
30S-1.
It seems that every problem that any amplifier has is parasitic related. It
may well be that the damage to my 30S-1 was caused by a parasite in the
driver of the Fedex truck, but I cannot prove that. I would like to have
installed one of your parasitic suppressors in a special are of the Fedex
driver when I saw the damage. If the driver knew that he would be end up
with one of your parasitic suppressors as a parasitic suppository if he
dropped it, it probably would have prevented the damage.
I also have an amplifier I built 42 years ago with 4 x 6AG7 tubes in it. It
does not use nichrome either.
And, I have a Motorola amplifier for 40 mHz that has been converted to 6
meters. It has no parasitic suppressor, but works fine.
73, Colin K7FM
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