Ortec Model 109A Preamp Preamplifier.

This has been tested with a Canberra 807 Pulser per the manufacturer's instructions, and it functioned on both the 1x and 10x settings. The input JFET is extremely sensitive to the abrupt application or removal of bias, and therefore we only recommend this preamplifier for users with experience with this kind of equipment. 

You will receive ONE of the items pictured in the lot photo. 1 of the 5 available items has a SHV connector for detector bias, as well as an integral cable. PLEASE SPECIFY IF YOU WOULD LIKE THIS VARIATION WHEN YOU ORDER.