Quite a few years ago I built an EB-63 SS amp (~140w)
from CCI (2 X MRF 454). The intention was to use it
with various CW, PSK and SSB QRP rigs. I built the
K5OOR "100 watt Low Pass Filter Board" kit, but really,
those inductors are just too small, too close together,
and get wayyy too hot. It's really not for 100w use.
But there are other LPF boards and circuits out there
for me to research.
But much more importantly, I have since learned from reading these
amp blog boards that the EB-63 is not linear, has no real
bias control circuitry except a big clamping diode, operates
strictly Class C and has horrible IMD performance. (I have
learned a lot from reading the "gurus" on these boards.)
So...what am I to do, if anything, with this amplifier?
IS THERE a way to build in proper bias control, or should
I just say "Lesson learned, oh well", throw in the towel,
and use the parts for a better amplifier design?
Just operate Class C CW? (With the proper LPFs of course).
Would the IMB be acceptable at lower power, say 50w?
(I have no equipment that could test this)
I'd never sell it to a non-ham or CB'er, and probably not
even to a ham who doesn't plan on fixing the IMD issue.
Suggestions? Ideas for a good bias control circuit to add?
Or chock it up to lesson learned and start over?
TNX ES 73, Ken AD6KA