How to bias a tube amp with a Multimeter

I’ve had this Shuguang s8mk integrated sitting in storage for 6 years. I bought a multimeter to bias it. The meter is set up to mV.

I’m getting zero read results. The amp has been warmed up for 90 minutes.

It’s got a funky bias panel.

What am I doing wrong?

coltrane111-17-2024 10:19pm

yogiboy Details Discussions Posts This discussion Message User 5,659 posts 11-19-2024 at 01:16am Copy Comment URL Report Comment Edit Delete Here ya go! https://www.galvinpower.org/bias-tube-amp-with-multimeter/
imhififan Details Discussions Posts This discussion Message User 2,181 posts 11-19-2024 at 02:16am Copy Comment URL Report Comment Edit Delete Measure the resistance at test points + and - with the amplifier powered off. If you cannot get any resistance readings, you cannot bias the output tubes. If this is the case, the problem may be a bad meter probe or the amplifier test point is not connected to the cathode resistor.
larryi Details Discussions Posts This discussion Message User 3,981 posts 11-20-2024 at 01:46pm Copy Comment URL Report Comment Edit Delete It is easy to check the meter probe--just touch the two together when testing conductivity or resistance. Probes are often pretty cheaply built and the wires, because they are constantly being moved and stretched, often do break. That is a good observation of possible unexpected problems.