Common Mode Noise Reduction Kit: For Amateur Radio Operators

Fair-Rite · Part 0199000063 One kit for the common noise paths around your station. A practical assortment of genuine Fair-Rite Snap-It® and toroidal cores for locating and suppressing common-mode RF on feedlines, power leads, audio, USB, control cables and other station wiring. 1 MHz–500 MHz 31 Material® 8 components Reusable case One case. Multiple noise paths. Test the real installation—not just the theory. Common-mode current can ride the outside of coax, couple into control wiring, or leave through power and data leads. Five core formats make it easier to compare fit and placement before choosing a permanent layout. 01 Feedlines Test choke placement and reduce unwanted current on the outside of coax. 02 Station wiring Clamp around power, audio, USB and control cables that may carry RF into equipment. 03 Field diagnostics Compare sizes and locations without committing to a single core format. Suggested suppression range1–500 MHz Inside the fitted case Eight components in five useful formats. ×1 31 round cable core61 × 35.55 × 12.7 mm 2631803802 ×2 31 oval Snap-It® assembly19.2 mm minimum opening 0431184751 ×2 31 round Snap-It® assembly6.3 mm maximum cable diameter 0431164281 ×2 31 round Snap-It® assembly12.7 mm maximum cable diameter 0431164181 ×1 31 round Snap-It® assembly18 mm maximum cable diameter 0431176451 Technical overview Specifications Manufacturer Fair-Rite Products Corp. Kit part number 0199000063 Material 31 Material® MnZn ferrite Suggested range 1 MHz to 500 MHz Contents 8 pieces across 5 part numbers Core formats Toroidal, oval Snap-It®, round Snap-It® Primary use Common-mode conducted EMI suppression Is this a finished filter? No. It is an assortment for testing ferrite size, placement and cable fit. Results depend on frequency, cable geometry, turns and the current path in your installation. Why 31 Material®? Fair-Rite specifies 31 Material® for EMI suppression from as low as 1 MHz up to 500 MHz, making it a versatile choice for common-mode troubleshooting. Can the Snap-It® cores be repositioned? Yes. The hinged assemblies can be fitted without cutting or disconnecting the cable, provided the chosen size closes correctly. Is the organizer case included? Yes. The complete assortment is supplied in the reusable fitted case shown in the product gallery. Specifications are based on Fair-Rite manufacturer data. Manufacturer reference ↗