Binary Counter (CB6139E)

This General Electric circuit is from the 80's. The PUTs used in this meter are not common components today.

| Clique na imagem para ampliar |

Japanese Radio TR 72 (CB18369E)
This sensitive Japanese mid-wave receiver from the 1960s has an output power of 45 mW and is...
Flyback Tester (CB23812E)
This circuit appeared in a Radio Electronics magazine in March 1962. The circuit uses two...
Amplifier for the power grid (CB23665E)
What's different about this transistorized circuit is the fact that it doesn't use a voltage...