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The following printed circuit boards (PCBs) are photomultiplier tube (PMT) compact voltage dividers utilizing surface mount components:
106PMT-1 (P1) - Voltage Divider for 3/4" Hard Pin Tubes, 2 Wire (See Schematic 106PMT1)
106PMT-1 (P1) - Voltage Divider for 3/4" Hard Pin Tubes, 3 Wire (See Schematic 106PMT1A)
106PMT-2 (P2) - Voltage Divider for 3/4" Flying Lead Tubes, 2 Wire (See Schematic 106PMT2)
106PMT-2 (P2) - Voltage Divider for 3/4" Flying Lead Tubes, 3 Wire (See Schematic 106PMT2A)
106PMT-3 - Voltage Divider for 1-1/8" Hard Pin Tubes, 2 Wire (See Schematic 106PMT3)
106PMT-3 - Voltage Divider for 1-1/8" Hard Pin Tubes, 3 Wire (See Schematic 106PMT3A)
106PMT-4 - Voltage Divider for 1" Flying Lead Tubes, 2 Wire (See Schematic 106PMT4)
106PMT-4 - Voltage Divider for 1" Flying Lead Tubes, 3 Wire (See Schematic 106PMT4A)
Each board type is configurable for either two wire or three wire connections. Flying lead boards mount directly on the PMT wire leads. Lower resistor values can be used, but the values shown on the schematics have worked well for decades in many industry standard tools. These little PMT voltage divider PCBs are real time savers when compared to the tedious construction of dividers from leaded parts on tube sockets. These boards are all round and each is smaller than the outside diameter of the glass envelope of the tube type for which it is designed.
The 106PMT-1, 2, 3, and 4 PMT Voltage Divider PCBs are part of the 106 Radiation Tool™ PCB family. 106 Radiation Tool PCBs can be used to upgrade or repair tools, or an entire electronics section can be assembled from scratch using several PCBs (as in reworking an old tube / Nuvistor tool). All 106 Tool PCBs use readily obtainable components, which parts will continue to be available for many years to come. Due to time constraints on maintaining this website, the PCB illustrated below may not be the most recent revision of the panelized board and / or circuits.
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