The integrated circuit used is uncommon today. We found this configuration in Motorola's 1990 Linear Databook. The triac can be any of the TIC series.
The current drained by this circuit, from a 1976 documentation, is 3 mA and the cut-off frequency is...
Based on the MC1488 or MC1489 operational amplifiers, this circuit has a 5000V isolation driving a...
With its high power and high performance, this power amplifier is ideal for high quality sound...