Suggested by General Electric in a 1968 documentation this integrated amplifier uses a component of the era, the PA237. The circuit runs on 24 V and excites a 16-ohm speaker.
The circuit presented uses an integrated circuit Sanyo, not very common in our day. This amplifier provides...
This 80's circuit uses a light-sensitive SCR or LASCR and a one-sided silicon switch SUS, uncommon...
This circuit is from an old documentation making use of a 3,579,645 MHz analog color television...