As long as it's within the range for your amp's voltage, you should be fine.Your tone is your identity and sometimes nothing less than a custom setup can deliver the goods.Ĭreate authentic and mind-blowing tones that can be tweaked and fully customized.īIAS AMP 2 is the ultimate virtual amp designer, authentically recreating the tone and feel of real tube amplifiers, while allowing you to mix and match components to create your ideal amp.

Measure your amp's actual plate voltage and the chart will tell you the correct bias range. If the 'good' tube is now fluctuating when you swap the tubes around, you know it's a problem with the tube socket.Īs far as the actual bias setting you should use, follow this chart: (look at the chart for 6V6). If the fluctuating bias problem follows the same 'bad' tube to the new socket, you will confirm that it's the tube that's bad. I would start by swapping the two tubes around. Regardless, in your situation it seems like you either have a bad tube or something wrong at the socket of the tube that's acting up. Some amps have bias test points, some do not-and the bias must be read off the tube socket directly or from using another method (like the shunt technique). Do not confuse 'bias trim pot' with 'bias test point.' They are two different things. Some have individual bias pots per tube or per pair of tubes. The vast majority of amps out there only have one bias trim pot for all the tubes.

Bias guitar amp tubes bias jumps