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
