This receiver was found in a Popular Electronics from the 90's. Its different configuration shows a tuning circuit after the tube that works as an aperiodic amplifier. Observe supply voltages.
This small FM transmitter circuit, using only common transistors, includes a mixer that allows it to be...
The presented circuit emulates a precision diode. The operational can be replaced by a more modern...
This circuit was found in a 1968 Hughes documentation. The transistors are from that time. The coil...