Two-input amplifier (CB21661E)

The critical component of this 1967 amplifier is the driver transformer. The circuit has both high and low impedance input.

Damped tone generator (CB8842E)
This circuit uses an unusual electromechanical component: a mechanical blade resonator. The...
Transistor Amplifier (CB18859E)
This circuit from a Japanese publication in 1968 uses germanium transistors from the time like the...
Operational power VCO (CB8779E)
Found in a 90s Electronic Design, this circuit can provide a relatively high-power output. The basic...