111B Scintillator GETTING it to WORK !

A must see before attempting to refurbish or repair your Precision Radiation Instruments 111 or 111B Scintillator. These aging units have some very common and easy to fix issues which are explained here in detail.

[@GeigerCounterVirtualMuseum]

Very helpful video. Great advise about the wire jumpers on the switch.

[@ClagwellsGarage]

Thanks! I'll try to put together an update to this later. I've since identified a couple other gremlins that aren't too uncommon.

[@quantum-inc]

That's great, never seen these scintillator before , so much equipment available in the US. Can these be used for neutron detection?

[@ClagwellsGarage]

Not without heavy modification. Firstly, the crystal would have to be replaced with a hydrogen rich and clear plastic version so it can use proton recoil as the given method of detection. Such plastics (PVT and such) are not blind to alpha, beta, and gamma so a peripheral pulse shape discriminator would need to built and incorporated so it’d only count the neutrons. Lastly, this would only be suitable for static source neutron emissions (reactors, Pu, Po/Be, etc) as an electrically generated neutron generator would wreak havoc with high voltage noise resulting in tons of false positives.