This circuit uses a capacitor that depends on the frequency of the crystal. We found it in a 1967 documentation. The maximum frequency is around 100 kHz.
This circuit can be installed inside a toy space gun to produce a “Phaser” effect. The circuit is from...
Found in an English publication from 1967, this circuit generates 5 kHz signals with harmonics that...
The characteristics of this amplifier that does not require a symmetrical source are given in the...