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.

Alternate Action Switch (CB145)
This circuit turns on and off when a short pulse is applied by SW to the input of the first...
Radio with amplifier (CB20486E)
We found this circuit in a publication of 1991. The audio amplifier is an operational that admits...
Overtone FET Oscillator (CB4584E)
The oscillator of the figure has its frequency determined by the crystal. The indicated value is...