This 3-valve receiver was found in a publication by Edelman from 1924. The circuit has two supply voltages, B being 60 to 90 V.
Unlike the previous one, this circuit is intended for the reception of frequency modulated signals...
This modulated light transmitter was found in a 90s Popular Electronics. In place of the lamp with...
This circuit from the 90s, found in an Electronic Engineering can be used as a shield since its...