High impedance stage (CB20564E)

This high input impedance amplifier stage was found in a 1963 documentation. The transistor germanium of the time.

Pre For Crystal Pickup (CB18555E)
This preamp with a transistor for turntables with crystal capsules was found in a Japanese...
Fixed Frequency VFO and Variable Cyclic Ratio 555 (CB17247E)
This variable frequency oscillator generates signals that have a recurrence frequency determined by...
Pulsing Timer (CB24078E)
This circuit with neon lamp and unijunction was found in the September 1970 Radio Electronics...