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 galena XTAL is replaced by a germanium diode in this Project. Diodes such as the 1N60 or 1N34...
This transmitter for the 7 MHz range, as we can assume by the number of turns of the coil, since the...
We found this circuit in an old documentation. Its purpose is to turn on warning lights when the...