Single pulse generator (CB9241E)

This circuit was obtained in a 1964 Electronic Design. The components used are from that time. Observe the high voltage used in the supply.

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Photometer (CB7911E)
This light meter or photometer was found in an American documentation from the 90s. The comparator...
4.5 W amplifier with LA4430 (CB15730E)
This amplifier is suggested by Sanyo and can excite loads of 4 ohms with a power of 4.5 Wrms. The...
Dialing indicator (CB5995E)
This circuit provides a signal when dialing occurs. The circuit is powered by the telephone line...