This simple 1-transistor audio preamplifier appeared in the June 1968 Radio Electronics magazine. The transistor is a general-purpose type of the time. The gain is 14 dB.
When the equipment powered by the SO1 socket is turned on, the SO2 socket is automatically...
This microcircuit that fits in an aspirin box was published in Radio Electronics magazine in...
This circuit was found in an American publication from the 50's. The transistors are made of...