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.
In the figure we have the way to obtain the Exclusive-OR function with 1 transistor. The circuit...
This two-digit circuit was found in the 1999 Radio Experimenter Handbook. It uses the CA3161 and...
This circuit with an unusual configuration was found in the January 1974 issue of Radio...