Technical review. Class AB IV. In Class A we have discovered that the ouput power is quite limited and we cannot reach high signals while in Class B the ouput signal is more powerful but yield no linearity, and both classes show a too low efficiency. As amateur radio we need power, W in input and up to 2 kW ouput that depends of your national regulation , we need a linear signal and efficiency. These amplifiers use power devices that are are slightly polarized so that they work in the linear region of the load line for weak signals Class A and in Class B for stronger signals.
QRZ Forums. However, there are still a few important applications for Class C amplifiers whenever high efficiency and high output is required. Class C is also a lot easier on power supplies for a given output power. In addition, you can drive a class C amplifier with a linear amplifier, such as an ordinary sideband rig
There are three fewer questions in this section. The question on klystrons, for example, was removed. Some of the other questions were changed…Dan.
First, let's talk about some basics of solid state amplifiers. Bias is used to "turn on" the transistor or transistors in an amplifier. A transistor, like a diode, doesn't do anything until it's input voltage rises above 0. Bias simply raises the voltage on the input of a transistor to the point just above it's "turn on" point.