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This is a very useful device for determining the value of an unknown impedance. A range expander feture is built-in to extend its measuring capacity. Itcan be used with any receiver covering the desired frequency range.
The MFJ-204B hand calibrated Antenna Noise Bridge will measure antenna impedance in the range 1 to 650 Ohms. It can be used for adjusting resonant frequency and impedance matching. It can be powered from an internal 9V battery or external 12V DC source.
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