11 Nov
2005
11 Nov
'05
7:32 p.m.
I have been trying on and off for a while to map out
the schematic for the PSU of an HP7908 disc/tape unit.
There's a transistor I can't identify on the board and
I am wondering whether anyone can ID this thing for
me. The markings show "239" and then the batwings, and
then below that it says "4-456". Same problem for a
number of the diodes that are labeled "GE010673".
Thanks - Dave
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