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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Neon Power Monitor (CB24103E)
This simple neon lamp power indicator circuit was found in the January 1971 Radio Electronics...
1-Transistor AM Radio (CB18380E)
This elementary receiver with only one germanium transistor was found in a Japanese publication from the...
Regenerative receiver (CB22273E)
This simple 1 transistor circuit was found in an American documentation from the 60's. The...