Bugera 1990 Gold Pin Option

There are two versions of this amp, if your amp is the "Infinium" model them it is self biasing and will set whatever tubes are installed right at 30mA per tube. This is a little on the cold side but sounds OK.

The non-Infinium amps are adjustable bias amps and all you need to check and adjust the bias is a bias probe and a Multimeter, or our all-in-one Eurotubes "Pro One" bias probe that reads both the plate current and the plate voltage simultaneously. These are available under the "Related Products" tab.

You can use the "Generic Bias Video" we made using a Marshall 800 for reference. 

The video below explains the difference between bias probe types.