PETER ONION wrote: > Is there anyone on here that has experience with germanium transistors us= ed in=20 > logic circuits ? Yes > I'm having problems with some logic circuits from the 1960s that use OC42= =20 > germanium transistors. > I've googled a bit and read about the issues caused by the "high" collect= or-base=20 > junction leakage currents, but I'm not sure if the symptoms I'm seeing ar= e a=20 > consequence of this or not. They all do that sir... Try a can of freezing spray on the duff transistor. George Smith --=20 http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .