Amplifier stage with the T411E (T411E)

The pentode tube used in this circuit has 1.5 V filament. The circuit is a voltage amplifier with the 1U5 tube.

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...