Hamamatsu R9220 Photomultiplier Tube with High Voltage Power Supply Base. Used, removed from functional equipment.
I have a number of these units for sale, photos are representative.
Note: Some units are dated 2008, others are dated 2012. There may be small scratches on the socket assemblies, the photomultipliers appear to be flawless.
Condition: Used. Carefully removed from functional equipment.
