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Quick question about capacitor coupled amps

guitarplyr

Active Member
Hello all,
Quick question: How can you tell if an amp/receiver is capacitor coupled when checking for DC offset? Capacitor coupled amps need checked for DC offset differently, correct? (ie a speaker load connected when checking offset). I recently rescued a Yamaha A-760 integrated from an apartment building's basement, and I have a sneaking suspicion this amp is capacitor coupled but I'm not 100% sure and I don't know how to find out. Any help would be greatly appreciated.
 
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Hello all,
Quick question: How can you tell if an amp/receiver is capacitor coupled when checking for DC offset? Capacitor coupled amps need checked for DC offset differently, correct? (ie a speaker load connected when checking offset). I recently rescued a Yamaha A-760 integrated from an apartment building's basement, and I have a sneaking suspicion this amp is capacitor coupled but I'm not 100% sure and I don't know how to find out. Any help would be greatly appreciated.

:scratch2: Don't think so... Definitely not cap coupled. Hifiengine has a SM posted.
 
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Capacitor coupled amps have a DC output measurement of exactly 0mV. Zero.

It is very easy to tell whether an amp is OCL or not (a coupled one mostly has only one supply voltage [one PS filter cap] and the two large output caps are clearly visible, whereas an OCL amp has two voltages [±V]).
 
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