Melcor 1731 Teardown

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hfe depends on current level used, what was the current used for getting hfe = 75?
That is a good question. On all the transistors, I desoldered them from the board and popped them into a cheap tester, which I think runs a couple of different tests and reports the highest value of hFE it finds. At this point there are so many loose parts that it's probably easier to find the bad part by breadboarding the whole thing.
 
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