Offset Voltage Drift

[midimonster]

Hello,

I have just completed four A12's, and I am noticing about +/- 2mV drift in the offset voltage after the pre's have been on for awhile (40minutes). Is this normal?

What is an acceptable range for the offset voltage setting?

Thanks,
Eric

[tpryan]

That's normal and nothing to worry about. For best results, make a quick offset adjustment on first installing the op-amp, and then make a fine adjustment when the unit is up to temperature. You probably won't be able to get it much better than you already have, however.

[bradb]

turn you gain down too