This diagram was found in the November 1972 issue of Radio Electronics magazine in an article describing benchtop equipment. The transistors are of the time and the frequencies are given by the coils.
This small experimental transmitter can send its signals to distances up to 100 meters. L is...
We found this circuit in the 1977 RCA Solid State ICs. The circuit consists of a current amplifier with...
This circuit was found in a Japanese documentation of the 70's. It uses transistors of the era and is...