Vacuum Tube

D. What is Class A, B, AB, ultralinear, etc? 1. Class A means that the power tube conducts the same amount of current all the time, whethe...

A. Bias Bias is a negative voltage applied to a power tube's control grid, to set the amount of idle current the tube draws. It is imp...

A. High-power RF applications Many big radio stations continue to use big power tubes, especially for power levels above 10,000 watts and fo...

If you want to control a LOT of power, a fragile glass tube is more difficult to use. So, really big tubes today are made entirely of cerami...

A typical glass audio tube is made on an assembly line by people wielding tweezers and small electric spot-welders. They assemble the plate...