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2 hours and 45 minutes and we’re still working. As I said, all of this is with the top metal panel off so any heat can vent. There’s some significant warmth coming off the chassis mounted power transistor for this circuit and physically it is almost directly under the 723 and R12. My intent tonight was to let the 8600 fail and then freeze either the transistor or R12 but no failure so far. We’ll see what running overnight does and I’ll check it in the AM.
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