Hamamatsu R1847-17 2" (50.8 mm) Photomultiplier tube with Voltage divider and 1.5 m RG58 cable with BNC connector, carefully pulled from working environment and professianally tested using LaBr3(Ce) scintillation crystal and Cs137 radioactive source. Test performed using GS-MAX 8000 spectrometer hardware, sample spectrum is on the photo. 

Actual photo may slightly differ.

Want to build a gamma spectrometer? This is your chance! 

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