1V6 stage (T413E)

This amplifier circuit with the low voltage filament 1V6 tube was found in a modern publication of experiments with tubes. The plate voltage is 45 V.

Complementary Transistor Oscillator (CB495)
Audio signals can be produced by this circuit. Frequency range is determined by C1 and adjusted by...
10 to 84 MHz Colpitts oscillator (CB4052E)
This Colpitts crystal oscillator was found in an American publication for amateurs in the 1980s....
Negative Resistance Circuit (CB926E)
This configuration presents a negative resistance caracteristic such as the one found in...