Capacitive Relay (T1527E)

Found in Popular Electronics from August 1956 this sensitive two-tube relay is powered directly from the mains power supply.

13 V x 5A power supply (CB16891E)
This power supply with transistor regulation was obtained in a 1995 documentation. The power...
Intercom (CB22488E)
This two-station intercom was found in documentation from 1966. R4 should be experimentally...
Power inverter (CB22504E)
We found this circuit in a publication from 1966. The components are from the period. Complete...