MFJ-801 by MFJ Enterprises, Inc.
The MFJ-801 Field Strength Meter is ideal for reading relative field strength from your antenna.
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The MFJ-801 is so small that that it fits in the palm of your hand. The best part of using it is that you now can tell if your antenna is radiating or not by simply holding the unit near your antenna and adjusting the sensitivity. Futhermore, by taking measurements, you can find out relatively how strong your antenna field is.
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