Triac Heating control (CB21372E)

We found this circuit in a 1966 RCA manual. The integrated circuit is unusual, and the Triac must match the load.

Line Driver (CB24229E)
This circuit couples 600-ohm signals to a line of the same impedance consisting of an amplifier stage....
Electronic Ignition RCA (CB4623E)
This circuit is suggested by RCA and is based on a dedicated integrated circuit that is the...
Symmetrical Power Supply (CB19254E)
The power supply shown has protection against short circuits and can eventually be mounted with...