This 1968 Mallory circuit uses an uncommon integrated circuit today. The circuit has a 30 to 20,000 Hz response with lower power and is powered by 12 V.
Suggested by Mullard in a1969 documentation, this circuit generates the erasure signal for tape...
A pulse applied to the input of this circuits results in a damped signal in the output. Frequency...
This circuit can activate a powerful lamp or call system when a telephone call occurs. Suitable for...