Micro amplifier (CB23733E)

This direct coupled amplifier using 3 transistors and low voltage power was found in the April 1961 Radio Electronics magazine.

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Telegraph Practice Oscillator (CB4890E)
This traditional oscillator circuit that can be found elsewhere in this section uses general...
Tape preamplifier (CB20575E)
With NAB equalization we found this circuit in an English documentation from 1967. The transistors used...
Remote control tunnel transmitter (CB23885E)
This circuit was found in Radio Electronics magazine from June 1963. The range is small and the...