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Original Message
RE: the main/output coupling caps...
Posted by DAK on March 16, 2017 at 12:01:17:
Is somewhat a contradiction in terms.
The output capacitor usually refers to a capacitor in the output stage of a preamp before the signal goes to the output jack.
Tube Amplifiers would not have a capacitor output but a output transformer, unless it is a OTL amp.
A coupling capacitor joins different gain stages in the amp and blocks the DC component allowing the signal (AC) to the next stage.