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The 106AC-5 Anti-Coincidence printed circuit board (PCB) is an anti-coincidence circuit based on one of the simple clocking schemes used by GO in their X-Y caliper tool (this compact variant uses only two 14 pin cmos integrated circuits, a 4013 and a 4093). It is an ideal design for applications like an X-Y caliper where the two pulse trains will be virtually identical in frequency and phase in the case of a round borehole if unprocessed. The 106AC-5 PCB is jumper configurable to be compatible with either armor / chassis negative or armor / chassis positive line power. It requires only a single 10-15 volt power supply to operate. The semiconductors are ordinarily mounted in high quality machine pin sockets, but can be mounted directly to the 106AC-5 PCB if low clearance is required. The 106AC-5 PCB is 0.8 inches wide and mounts on two (2) inch centers.
The 106AC-5 Anti-Coincidence PCB is 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, and all use convenient turret terminals for wiring connections.
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