This modulator amplifier for transmitters was found in a 1947 American book. The circuit uses an output with 4 tubes connected in parallel and in push-pull.
This set-rest relay uses two SCR and two switches to control a DC relay. The circuit can be used...
This simple power supply for transistors was found in documentation from the 1940s. The...
The purpose of this circuit is to measure the absorption current of a capacitor. Dielectric...