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The 106CCL-4 Downhole Casing Collar Locator (CCL) Amplifier (previously 106CCL-2) printed circuit board (PCB) is a simple and reliable SIE style downhole CCL amplifier suitable for use in a wide range of cased hole logging tools. (See our Casing Collar Locator (CCL) pages for more general information.) It uses a single 2N2102 transistor, or a 2N3439 higher voltage rated "bullet proof" device, in a circuit that has been tried and true for decades. This design is intended for use in 120 volt line powered applications. The 106CCL-4 PCB is jumper configurable to run off either armor / chassis negative or armor / chassis positive line power. The transistor is ordinarily mounted in a high quality machine pin socket, but can be mounted directly to the PCB if low clearance is required. The 106CCL-4 PCB measures 0.8 inches wide and mounts on two (2) inch centers.
The 106CCL-4 Downhole CCL Amplifier 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. We prefer through-hole components for PCBs designed to survive high temperature, but selected components have provisions for either through-hole or surface mount (SMT) where price and/or availability is an issue.
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