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.
April 2017 - New Texas Instruments DRV8x brush motor drivers for 1.7 to 8 A currents and voltages...
This circuit was found in a technical documentation from the 90's. The transistors can be...
This circuit was found in American documentation from the 90's. The circuit applies to any...