This receiver circuit was found in documentation from 1924. The circuit uses two batteries, the high voltage one being 90 V.
This 80s signal follower makes use of an audio amplifier of the era. The circuit can be adapted to...
This circuit from Ferranti was released in 1969. It makes use of the company's transistors that admit...
This transmitter operates in the FM band emitting beeps that can be picked up on a common radio at...