This wide-range radiation monitor was found in a 1980s documentation. The circuit uses a diode as a sensor and is quite critical requiring shielding shown in dashes to prevent snoring due to gain.
Found in an American documentation from 1969, this astounding circuitry makes a relay operate on 3 Hz...
This configuration with the 741 Operational Amplifier has an NAB equalization for magnetic...
The basic idea of the circuit shown in the figure is to increase the brightness of an ordinary...