Noise output for both channel

[small9]

What could be the issues with noise output when volume turn to minimum on both channels.

Top is the output, bottom is input. The output has ~0.8 volte noise.

This is a clone Musical Fidelity a120.

Thank you for your help.

 

[Mooly]

Looks like instability to me.

Same thing happens with small signal stuff as well.
Swapping Op-Amps... you have checked to see it's stable haven't you ?

 

[rayma]

Definitely.

 

[small9]

Thank you Mooly,
In that example fix is added a "5pf cap across R33". I will look in to that.

 

[sgrossklass]

How much of a "clone" is your amplifier?

Remember: The layout is the circuit! Power supply rails and Zobel network are particularly critical.