This circuit is from a 1977 Signetics integrated circuit manual. The output transistors can be BD136 and BD237 and the symmetrical supply can be from 6 to 12 V. The voltage gain is 10.
Indicated for automotive use, this circuit was found in a Popular Electronics from the 90s. The...
January 2017 - Bourns' 100 mm motorized sliding pots can now be purchased from Mouser Electronics....
This old oscillator using germanium transistors has a high impedance headphone as inductor to...