This circuit was found in a 1970's Radio Electronics. The pulse transformer has a 1: 1 turn ratio. The triac must be in accordance with the controlled load.
The frequency depends on C, which must have the indicated value ratio, and also on R, which can be...
Found in American documentation from the 1970s, this circuit is intended for amplifying analog TV...
This configuration makes use of an integrated circuit of the time having been found in a 1976 NASA...