28 Nov
2021
28 Nov
'21
2:06 a.m.
On 11/27/21 2:34 PM, Al via cctalk wrote:
Thank you all for your responses and the leads you
have
given,??Responses to some of your questions and some more
questions:?"Have you checked/measured whether they're
actually faulty?"?Yes I have, in the picture I have
provided on the bottom there are the ends of 3 transistor
leads. This was one that fell off as I removed the card
and by far the worst corroded, so despite the fact that
the rest still work. I need to replace this one.
Yes, saw that in the pic.? Maybe you can scrape the leads
and solder a blob to that one and take some measurements, if
there is enough lead length left.? First thing is to
determine if it is Germanium or Silicon.? The similar leads
rusted through issue sounds like these may be from a
transitional period between SMS-Germanium and SLT-Silicon,
so they might be Ge.? If so, the forward drop of the BE
junction will be about 0.3 V, instead of the Silicon's 0.7
V.? Finding Ge transistors today will not be easy.
Jon