This circuit with the PA7601 was found in a 1967 Philco-Ford documentation. The circuit has a pass band from 45 to 120 MHz.
This TTL siren is formed by two oscillators using each two Gates of a 7400. Frequency or the...
We found this circuit in the 1982 SGS Linear Integrated Circuits Manual. Diode D1 prevents the...
This circuit is from old documentation, but can be easily assembled as components are still...