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.
This amplifier with a few watts of power was found in a Japanese technical documentation from the...
This circuit is from a 1977 National Semiconductor integrated circuits manual. The circuit admits...
This conventional power supply uses discrete components and can provide 12 V or 13.6 V output with...