Ampeg 3 pro bias issue

[pontiacpete]

This pro 3, after being on for about 20 minutes to a half hour, has a bias voltage of 12-14mA with the trim pot maxed. Also the high voltages on the rails is +/-75vdc. It sounds good and the wave when the output is scoped looks good, no notches. Is there anything to be concerned about here?

I also tried new tubes in the power amp section

[Jon Snell]

The SVT pro 3 is a solid state output stage with valve drivers. There are no power amp valves.
Please confirm model number.
Thank you

[g1]

The 12A*7 tubes in the power amp should not affect the bias. If you have a schematic that states the bias target and the supply voltages, please post it.

[Helmholtz]

Any real problem with the amp?

[pontiacpete]

All I have about the bias is what I’ve read on the internet. I think it was that bass forum. As far as the rail voltage goes, the schematic says it’s +\-65v.

no the amp seems to work well. I was just concerned there might be something I’m not seeing

[Helmholtz]

. As far as the rail voltage goes, the schematic says it’s +\-65v.

What schematic?

[pontiacpete]

Sorry here it is
svt pro 3 power supply.pdf