Biasing - Ultralinear vs Triode mode.

As mentioned elsewhere, I just picked up a Panor/Dynaco ST80. Set the bias per the manual while it was set to ultralinear mode. Switching the amp to triode mode, the indicators indicate that the bias is low. (Personally like the way this sounds in triode over ultralinear).

As I suspect the topology is similar to the VTA amps, should I leave the bias as set with ultralinear selected, or rebias with the amp in triode mode?

Thoughts?

I've seen the same thing happen with my M-125. It's only a little over +0.03V difference if I bias to 1V while in Triode mode, then switch to UL.

So I guess it would matter more if the line voltage is a tad on the "hot" side. Personally, I use a Variac and strive to keep the volts to about 115V-117V, so the extra few hundredths of a volt isn't a problem from what I've measured internally. So, going in the opposite direction like you've stated also shouldn't be a problem.

Therein lies the issue... On the Panor ST80, all I have to set by is the LEDs. I actually have no idea what the voltage (hence current) is. Kind of wish they had provided test points as well.