of the cycle, as in class AB2. Since almost all guitar amps are class AB1 or A1 (it takes a DC-coupled cathode-follower or interstage transformer to be able to drive the power tubes... in class B, but more than in class A. The distortion is less than in class B, but more than in class A. Most push-pull guitar amps run in this class of operation. In a class AB... stage guitar amps operate in class A mode. Class B: This class is usually used for push-pull only, although you could have a single-ended class B amp, but it wouldn't sound very good...

The Last Word On Biasing The Last Word On Biasing General There are only two things to worry about in biasing a guitar amp. The first and foremost is not to set the bias current... to the output tube grids (as it is in almost all guitar amps). Following are additional reasons why this method should be avoided: When driven into the positive grid region..., but it is dependent on the plate voltage and the class of operation. If you take a "standard" guitar amp and lower the screen voltage, you can raise the grid voltage (less negative) and bring...

by the graphs. This "rule-of-thumb" will work in most cases for commercial guitar amplifiers. The only place it will fail is for amps that have very low plate load impedances or extremely... "instantaneous" plate dissipation. Average dissipation is what really counts in most tube amp designs. It is the time-average of the instantaneous dissipations over the input cycle... characteristics of the amp), the plate current will flow for a longer period of time during the cycle. The plate load impedance is extremely important, as it sets the maximum average plate...