The Greenlee 177 Precision Tone Generator is part of Greenlee's premium collection of tools and accessories. This tone generator is used in the telecommunications industry for pair identification and fault locating. It supplies a precise 577.5Hz crystal controlled signal frequency, has a variable output that allows you to adjust the signal strength to suit field conditions and approve accuracy. It's designed to work with any common amplifier and exploring coil for aerial fault locating.
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