[Milsurplus] power supply for KWM-2A
Unserviceable but Repairable
cosmoline at aa4rm.ba-watch.org
Mon Oct 29 07:55:36 EST 2007
HP23 supply gud advice for KWM-2 Meir
To cross-pollinate just match the gazouta on the HP23's 11-pin socket
to the m2's gazintas.
Or homebrew one as nearby.
800vct TV xfrmr into a Si bridge where gnd goes thru a 200ma choke &
& 450v filter caps on bridge pos. output with cap tie point
connected to old xfrmr HV c-t. Then, voila, 650 & 325 v for 'm2
6V some amp fil xfrmr in series w. TV xfrmr 6Vac. There's 12VAC.
Small reverse-connected AC wall-wart or fil. xfrmr into bridge &
filter cap. Drive w. unused 5V TV xfrmr wdg. & fiddle to get right
stuff for 'm2
In overview this's OK. Sri re bias details for M2 - only have HP-23
for inspection.
However, when you're done you'll have
a. The M2 running again w. a HP-23 or above kludge
--or--
b. Your dead skunk in the middle of the road
In closing, the right TV power xfrmr is becoming harder to find than a dang
HP23 or 516F2!
'rm
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