Photonis XP5312/XS 3" (76 mm) Photomultiplier tube with Voltage divider, carefully pulled from working environment and professianally tested using LaBr3(Ce) scintillation crystal and Cs137 radioactive source. Test performed using GS-MAX 14 spectrometer hardware, the spectrum is on the photo.

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

Check out my other lots, I hope you will find something interesting!

Fell free to ask questions.