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Precipitation Static

November 25th Fact-of-the-Day

Precipitation static is a continuous interference that tends to suddenly mask reception for appreciable periods of time. It most commonly occurs in aircraft receivers when a plane passes through a region where cloud particles are electrically charged. Each particle accumulates additional charge on the plane surface until a voltage level is reached where corona breaks out from one or more sharp points. However, under certain high-wind conditions precipitation static also can occur with stationary antennas. Fortunately, it can be almost totally avoided by the simple measure of grounding each antenna element at some point, or where that is not practical, by simply connecting a resistor of approximately 100,000 ohms from any point on each element to ground. ©2004 Martek International All rights reserved.


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