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.

12 W fluorescent inverter (CB20447E)
This circuit was found in a recent English publication, making use of a power transistor that...
50 to 150 MHz Oscillator (CB6513E)
We find this oscillator in a 1980s documentation. The frequency depends on the crystal and the...
Duplex audio link (CB9233E)
With this circuit it is possible to receive and send audio signals simultaneously over the same...