The MFJ-974B is a fully balanced true balanced line antenna tuner. It gives you superb current balance throughout its very wide matching and frequency range.
For decades, the Johnson Matchbox has been the standard of comparison for balanced line tuners. But, it had a severely limited matching range and covered only 80, 40, 20, 15 and 10 Meters.
The MFJ-974B is its successor. It meets todays needs and even surpasses the Johnson Matchbox's outstanding performance.
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