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.

Infrared Transmitter (CB20337E)
This infrared emitter (pulsating) can be used with several other alarm and remote-control circuits on...
UJT Triangular Signal Generator (CB19509E)
Signals of up to a few tens of kilohertz can be generated by this circuit found in a European...
Broadband Amplifier (CB20057E)
This amplifier was found in a technical documentation from the 1970s. The circuit uses 2N2218...