In Reply to: Help needed: OTL3 Front End Bias not reaching 85V posted by unlisted on January 29, 2015 at 14:38:42:
Check the Dynamicaps for shorts where the leads exit the body of the capacitor. They are fragile. The output tube "glowing" might have meant that the coupler cap to that tube is at least intermittent. This would alter bias (reduce or eliminate it) on that tube which would result in thermal runaway, and could have caused the glow. This is a long shot, I admit.
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- RE: Help needed: OTL3 Front End Bias not reaching 85V - Lew 19:43:25 01/29/15 (0)