Square sawtooth converter (CB8926E)

We found this circuit in a 1967 American documentation. The diodes are general-purpose and the input frequency can be between 80 and 800 Hz.

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Damped filter for triac (CB6742E)
This circuit is from a 1967 General Electric SCR manual. The capacitors are polyester and the...
RC Oscillator (CB9048E)
This oscillator for frequencies up to a few tens of kilohertz was found in a 1970s documentation. The...
Modulator without varicap (CB21085E)
This varicap-less modulator circuit was found in an Electronic Design from the 90's. The circuit...