In my chart recorders the modulating and demodulating was performed by the 50 Hz reed switch, and the germanium transistor AC amplifier was able to do a good job of working with the resulting 50 ...

Enter an old Radio Shack P-Box stereo amplifier kit. After a few modernizations and tweaks, the result is an 8-transistor stereo amplifier that’s aesthetically pleasing, sounds great ...

The first transistor was about half an inch high ... This contraption was the very first semiconductor amplifier, because when a bit of current came through one of the gold contacts, another ...

In order to develop the necessary technology, the project Magellan—High Efficiency mm-Wave GaN Transistor High Power ...