depending upon how far into clipping you set the grid drive. If you keep trying to eliminate the "notch", you will bias the amplifier too hot, and your tubes will be destroyed. This... have two class AB amplifiers, one with a plate voltage of 350V, the other with a plate voltage of 550V, and set them both using this method, the amplifier with the 350V plate voltage... may be biased too cold, while the amp with the 550V plate voltage may be biased too hot. If you try to bias a push-pull class A amplifier using this method, you will end up biased...

Is the Vox AC-30 really... Is the Vox AC-30 Really Class A? General There is a lot of discussion on the topic of class A amplifiers. The Vox AC-30 is always brought up... as an example of a class A amplifier, but is it really class A? First of all, how do you tell if an amplifier is class A? A push-pull amplifier is defined as operating in class A... half the input cycle, it is a class B amplifier. If the amplifier is designed such that the plate current flows for more than half, but appreciably less than a full cycle...

is zero, certainly not 50%! There is a class of amplifiers designed to take advantage of this low dissipation and ultra-high efficiency, known as "class D" amplifiers. Since... and be done with it? In some cases, you can. In a true class A amplifier, you can bias at maximum plate dissipation because idle is the point of maximum active dissipation... at idle. However, in a class B or class AB amplifier, the dissipation increases with applied signal up to a maximum at some point in the operating range (not necessarily full power). If...

truth. Everyone has different ideas of what it takes to build a good sounding, high-quality amplifier. Some manufacturers will insist only on original parts, cloth wire, etc. while... surges are expected. The first stage of the amplifier and other low-level stages, such as reverb recovery amps, are the most critical for noise, because the signal level is lowest... at that point, so proper attention to the type of resistor used will have the most impact on overall amplifier noise performance. Q: What kind of resistors do you recommend for power...