1 kHz oscillator (CB21934E)

This circuit was taken from the 1960's Mullard Transistor Manual. Information about the coils is given along with the diagram.

| Clique na imagem para ampliar |

Sensitive photocell (CB22533E)
This circuit is from a Radio Electronics from January 1958. The transistor is the CK722, and the...
Touch Sensor (CB18533E)
This circuit with transistors was found in an old Japanese publication, translation of an American...
45 MHz FI amplifier (CB8414E)
Found in documentation from the 90s, this circuit was used in communications receivers of the...