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.
This circuit generates a sinusoidal signal with only -80 dB THD. The circuit was found in a 90's...
This test, the commercial transistor tester, had its diagram published in an article in Radio...
This circuit can supply voltages in the range of 8 to 20 V with a maximum current of 3 A. The...