Found in older Signetics documentation, this circuit generates signals from 30 Hz to 25 kHz. Operational amplifiers are from the time, as is the matching pair of transistors.
This filter was found in the May 1989 issue of Radio Electronics magazine. The components can be...
This three-transistor amplifier uses a JFET at the input to increase the input impedance. The...
This power supply for model railroad was found in a February 1961 Radio Electronics Magazine. The...