I'm finally getting back to the Ampliphone HV board I was fixing back in
January. Reviewing quickly:
o Monitor was blowing +24 reg and BU406D.
o Replaceing both, reg now gets very hot and BU406D blow again
o With BU406D out, +/- 24 checks, Waveform at 555 checks out
o All other transistors / SCR check out
o Replaced the brown jumper with wire -- no change.
What was left was the Wintron and the red can. I've since tried Tom
McClintock's replacement of 3 10mh inductors in a triangle -- still blows
the BU406D, and reg's get very hot. (I've added a 1.5a fust to the +v
input, didn't blow this time).
My LOPT tester came yesterday, spent a late night last night building it --
and the Wintron rings fine.
So what's left is starting to swap parts with my working ampliphone --
something I don't relish doing as I don't want two dead Wintron's and/or
MC1's on my hands. That, and takeing out every other resistor, cap, etc and
testing them.
I am open to suggestions at this point.
-Chris
==========================================================
Chris Candreva -- chris@westnet.com -- (914) 967-7816
WestNet Internet Services of Westchester
http://www.westnet.com/
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Received on Sun Apr 6 14:23:51 2003
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