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- Jan 14, 2011
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- 75,390
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- Gillette, Wyo.
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- Halfbiass...Electron Herder and Backass Woof
So if R76R is there to limit current going to the base of Q7R, the Minus Drive Signal transistor, did the current limiting circuit of Q8 and Q9 work to protect the rest of the outputs and only the one PNP 21193 shorted because it was still/just conducting?R76 was responsible for the smoke...
That's what I think.. the miracle is q7 and 10 are ok.
Lee, the soldered in outputs were fun to remove and replace were they not?? Do you plan on putting in the newer backplane rev's?
With the RevE and up board, there would not be a thought of any miracle. The robustness of the MJE15034/35s are 4X what the predecessors in the RevD and earlier boards were.
The 5A AGX rail fuses should have lost this tug of war though.