This audio circuit was published in a Rado Electronics issue from October 1963. The transistors are from the time and the output is low impedance. Power is supplied with a voltage of 12 V.
The coil consists of 100 turns of wire 28 in a wooden or PVC tube from 2 cm to 2.5 cm in diameter with...
This circuit is based on the Texas Instruments LMC662 and has the function of monitoring the audio...
This circuit, which uses only common transistors, was obtained from a 1988 publication, but can be...