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Old 20th December 2012, 10:14 PM   #21
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When you posted the photo of the waveform, was that loaded or unloaded?

With no load, is the trace clean and sharp as it should be?

Yes.
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Old 20th December 2012, 10:23 PM   #22
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The signal posted is unloaded without the cap across CX22. Without a load and the cap added the signal looks sharp. Loaded with the cap I get distortion on the lower half at a certain amplitude.
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Old 21st December 2012, 06:42 PM   #23
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Do you have any significant voltage on the output pins of any of the op-amps for that channel?
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Old 23rd December 2012, 03:12 AM   #24
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Make any head way on this amp yet?
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Old 23rd December 2012, 03:52 AM   #25
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Nope, down with the flu. :banghead:

Sent from my DROID BIONIC
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Old 23rd December 2012, 04:49 AM   #26
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Sorry to hear that.....get well!!!
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Old 23rd December 2012, 04:57 PM   #27
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Well back at it, Q305-308 get hot. They are tied to the bias transistor. They get warm regardless the setting of the bias pot.
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Old 23rd December 2012, 05:39 PM   #28
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C306 was bad.
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