He3Tube Equipment

He3 Tube neutron detectors, 1200 Volts with EG&G (ortec) pre amp Model 142PC (Serial #787)

salthough 1200 Volts is applied to the Ortec Preamp, only 350 Volts is established on the "input" port where the Tube is plugged in. If 1250 Volts is applied, then 366 Volts is observed.