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The 106BK-2 Bond Kill printed circuit board (PCB) is a bond kill circuit designed for use in gamma-ray or gamma-ray / neutron tools equipped with a 106 family pulse former / line driver (or other bond kill ready 106 module) to allow simultaneous gamma ray (or gamma-ray / neutron) and cement bond logging. This design is a significant improvement over the SIE bond kill circuit, and was derived from designs used in the 1980s by CRC / Western and Bell. The output pulse is available in both pulse polarities (106 family bond kill ready PCBs utilize the negative pulse). Timing resistors R4 and R8, and trigger pulse sensitivity setting resistor R6, are turret terminal mounted for ease of selection or change on a fastened board. The 106BK-2 PCB is jumper configurable to be compatible with either armor / chassis negative or armor / chassis positive line power. It requires a single 10-15 volt power supply and a connection to line to operate. The 106BK-2 PCB measures 0.8 inches wide and mounts on three (3) inch centers.
The 106BK-2 Bond Kill PCB is part of the 106 Radiation Tool™ PCB collection. 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. Due to time constraints on maintaining this website, the PCB illustrated below may not be the most recent revision of the board and / or circuit.
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