Relaxation oscillator using a Thyratron (T426E)

This oscillating circuit for a frequency of 588 KHz was found in a book on electronic designs with modern tubes.

Additional Pull Pull (CB6119E)
This stage was found in a 1964 Electronic Design. The transistors are of the time and the shape of...
Successive Tone Decoder PLL (CB3958E)
This circuit with the known PLL 567 can be found in other versions in this section and in this...
Audio Monitor (CB421)
In this circuit, the LED Will blink in a presence of na áudio signal in the input. Gain is...