Neon Fuse Blown Monitor (CB24104E)

This circuit was found in the January 1971 Radio Electronics magazine. It keeps the light flashing if the fuse blows.

Two-Transistor Darlington Amplifier (MSB035)
This two-transistor amplifier can be used as power stage for intercom, experimental receivers,...
Electroscope (CB22132E)
This sensitive circuit was found in old English documentation. Transistors may be modern...
Logarithmic Converter (CB19486E)
This configuration, already presented in other points of this section and website, is of a...