With an output of 7.5 W at 110 V this circuit was found in a 1968 Motorola documentation. The circuit has an operating range of 95 to 2 000 Hz.
Found in Popular Electronics this circuit will trigger a buzzer if the ignition key is removed...
Found in Popular Electronics, this sophisticated short-wave receiver requires a lot of skill from...
This circuit is from an old American documentation using LEDs in the rectification. The circuit...