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MFJ-204B Antenna Bridge Instruction and Technical Manual
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INTRODUCTION & FEATURES
INTRODUCTION:
The MFJ-204B gives you a direct readout of your antenna’s SWR without the need for
formulas or indirect readings. The MFJ-204B can also be used to adjust a tuner to match
your antenna without the need for transmitting. The frequency coverage for the MFJ-
204B is from below 1.75 MHZ to Above 30 MHZ in 5 user selectable bands.
FEATURES
Portable – The MFJ-204B’s light weight, small size and internal battery capability
makes it great for Field Day, Travel or any time you need to check out a new antenna
installation quickly easily.
Great Value – The MFJ-204B’s low cost puts a great instrument in your hands for those
who only need to adjust their antennas occasionally.
Stable – With built in AGC the MFJ-204B is accurate across the bands. No false
readings.
Wide Range – Determine the RF Resistance of your antenna from 10 to over 600 ohms.
Rugged Construction: Attractive all-metal cabinet, conservative component selection
and extensive RF filtering ensure solid performance for years to come. Fully covered by
MFJ’s “No Matter What” one year limited warranty.
Before attempting to operate your MFJ-204B, please read the manual thoroughly. It
contains important detail about setting up your unit to obtain the best performance.
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