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.
This test consists of a simple Hartley oscillator using a transformer of the type found on older...
n be assembled with BC558 transistors for low power transistors and a BD136 for the output. The...
This oscillator takes advantage of the 2000 ohms headphone inductance as the oscillator circuit coil....