Push pull amplifier (CB21941E)

Using a pair of CK722s, this booster step of a few milliwatts of power was obtained in a 1960 Gernsback publication.

Medium wave transmitter (CB22502E)
This short-range, medium-wave transmitter was found in a 1966 documentation. The transistors are...
Mini Audio Generator CIR1296S (CB1395E )
This Hartley-type audio oscillator was obtained in an earlier 1973 publication. It can be...
LM386 Benchtop Amplifier (CB26258E)
This low-power benchtop circuit has an output for external use and other features. The circuit is from...