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.

FM Transmitter (CB23609E)
This circuit is a small FM transmitter, capable of carrying its signals over short distances...
48 V to 15 V x 1.5 A Reducer (CB17551E)
The purpose of this circuit is to obtain a voltage of 15 V with 1.5 A from a 48 V input. The...
TTL signal injector (CB22431E)
This simple circuit must be powered by a voltage of 5 V. The integrated circuit is the 7400, but...