100 MHz harmonic oscillator (CB9659E)

This Pierce oscillator was found in American documentation from the 1980s. Transistors support modern equivalents.

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Simple Thermostat with Hysteresis (CB12404E)
This thermostat was found in a 1997 publication. It can be powered by 6 V with the use of a...
12 V to 6 V Converter (CB24413E)
This switched-mode circuit was found in the April 1976 issue of Radio Electronics magazine. The...
High impedance preamplifier (CB22239E)
This circuit was obtained from an old American publication. Transistors are germanium types of the...