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Thanks Ed. Looking at Q4 its a 2SC3170. Doesnt seem to be made anymore but there are a few old ones up on ebay. do you know if there's an equivalent?
Great idea on the bulb tester, made one of those many many years ago i'll have to look for it or just make a new one.
Are diodes identifiable without a schematic? SAMS has one for $22 but id rather not add any extra expense to this project that may end up as a dud anyways.
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