Reflex receiver with loop antenna (T1659E)

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.

| Clique na imagem para ampliar |

FM Receiver via Power Grid (CIR25197E)
Unlike the previous one, this circuit is intended for the reception of frequency modulated signals...
Visible light transmitter (CB7852E)
This modulated light transmitter was found in a 90s Popular Electronics. In place of the lamp with...
Short Circuit Proof Lamp Driver (CB6850E)
This circuit from the 90s, found in an Electronic Engineering can be used as a shield since its...