Stereo preamplifier TDA3410 (CB21937E)

Taken from the 1982 SGS manual on integrated circuits, this preamplifier was used in commercial equipment at the time.

High Speed Single Pulse (CB6351E)
This high-speed circuit was found in 1980s Linear Technology documentation. The circuit makes use...
TwoTransistor Amplifier (CB987E)
The transistors of this amplifier for 8-200 headphones may be the BC548 or equivalent to replace...
Pulser with relay (CB23666E)
The frequency of this pulser depends on the capacitor and the characteristics of the relay. The...