Found in a 1967 Delco documentation, this circuit can deliver power from 40 to 50 W at 8-ohm load. The response ranges from 20 to 20 000 Hz. No information is given about the transformer used.
This low-frequency oscillator was found in a 1963 documentation. Capacitors determine frequency. The...
This circuit uses a triac to detect the level of a reservoir, and a sensitive SCR connected to the...
Found in a 1964 Electronic Design this circuit compares two signals by providing the inverse of the...