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 Phase-Shift Oscillator produces sine low frequency signals suitable for many applications. It...
I found this circuit in a Popular Electronics from November 1999. The magazine is no longer...
This amplifier became famous in the 1970s, it was sold in kit by Ibrape, Philips subsidiary for...