Every installation technician has faced it or soon will; the dreaded hum bars on the screen, a telltale sign of a ground loop. Ground loops are caused by voltage potential differences at the ground point on your equipment, voltages in the range of micro-volts up to mili-volts or higher. They occur when multiple A/V components are powered from different outlets, most commonly, outlets that are tied to different circuit breakers or even a different secondary from the power transformer. Ground loops manifest themselves in the form of hum bars called herringbone (diagonal lines on the screen) and AC beat (a wide, barely visible bar that rolls from the bottom to the top of the screen). Often you can hear the ground loop as the noise on the video encroaches on the audio signal.

Ground loop isolation transformers connect easily into your A/V system and break the ground path through cables between components. Start at the component last installed before the ground loop was discovered. Connect the isolation transformer at different ends of the A/V cable until the ground loop is gone.

MSRP	$119.99
Our Price	$61.51
Availability as of 2:46am 11/26/2009	Out of Stock Click to Verify Price and Stock
Condition	New and Factory Sealed
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