Paraphase amplifier (T389E)

This 6C5 tube circuit was found in a modern tube design manual. The circuit applies to other equivalent triodes.

Stepper Motor Control (CB12408E)
Any power MOSFET that supports the current of the controlled stepper motor can be used on this...
Crystal Signal Generator (CB6189E)
This QST circuit generates 4 frequency signals according to the crystals used. Transistors admit...
Anemometer (CB6483E)
This circuit was found in a Popular Electronics of the 1990s. The sensor is a rotating mechanical...