"This is useful if you're tracing the wire through walls. "If the signal is applied between earth-ground and one of the wires in the pair, the probe picks up the signal a few feet away," explains Hahn. The Fox and Hound offer two different techniques for tracing wire-one that traces within a few feet and another within inches. "Each user can set the Fox at a different tone to reduce confusion when locating circuits." According to Hahn, having two indicators on the Hound-an audio signal that gets louder and an LED that gets brighter-is exceptionally helpful in any environment where noise is present. "Having three separate tones is effective in a large facility where more than one person may be doing the same work," says Mike Hahn, senior designer at Triplett. The Hound 2 operates by induction, and uses both audio and visual signals to alert the operator to the presence of tone or circuit location. The Fox produces a square-wave signal and features three tones-low, warble, and high. ![]() Ohio-based Triplett Corporation (is best known for the Fox and Hound, a tone generator and probe with a unique name and recognizable packaging. Triplett's Fox and Hound 2 kit features three distinct tones, polarity, talk battery supply, continuity, and both audio and visual signals. And just like with carpenters and hammers, every installer has a personal preference for a certain tone and probe." Satisfying the demand You can't go out on a job to install or troubleshoot cabling without a tone generator and probe," says John Perala, senior business development manager for Harris Corporation ("There is a huge demand. (See table: download "Tone Generators and Probes" pdf) So, what's driving the market for these essential locators of both voice and data circuits that have been around for decades? Most industry professionals agree that it comes down to price, personal preference, and sometimes application-but most of all because it's something every installer and technician needs. They may be simple, but today's tone generators and probes offer new features that make them even easier to use. Nevertheless, installers and maintenance crews alike agree that tone generators and probes are still the most useful testing equipment in their tool kits. ![]() ![]() Okay, so maybe tone generators and probes aren't the most exciting tools on the market.
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