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.

Microphone Amplifier 741 (CB13714E)
This experimental circuit was obtained in a Radio Shack documentation from 1977. The transistor can be...
555 Voltage Tripler (CB25836E)
Found in the April 1995 issue of Electronics Now magazine, this circuit provides an output voltage...
Micro amplifier CA3130 (CB21978E)
Found in an English publication from 1977 this audio amplifier provides an output of a few...