This circuit was found in a documentation from 1948. There are 5 valves with push-pull output. The source uses a transformer, and the indicated application is with turntables.
This circuit is from the National Semiconductor Audio Handbook. The amplifier operates with 6 V...
This is an amplifier that uses a pickup coil placed next to the telephone set and the listening is done in...
The modified Hartley oscillator seen in the figure can generate signals ranging from 3 MHz to 10...