This Public Address amplifier was found in a 1947 amplifier manual. The power supply uses two transformers with two rectifier tubes.
We found this circuit in an American documentation. The power of the load, in this case,...
This flip-flop circuit is from a September 1985 issue of Radio Electronics magazine. It generates...
The circuit is from an Electronics Hobbyst Handbook from the 90s, being valid for panels of the...