What is the ratio of the tuners in the flex 6400M? i.e. will it tune above 3 to 1?

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What is the tuning ratio of the 6400M's antenna tuner?  
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Posted 2 years ago

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Photo of HCampbell  WB4IVF

HCampbell WB4IVF

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Official Response

Can it match a 3:1 or higher SWR?  Depends.  It should match a 3:1 SWR (and beyond) for resistive loads.  Here are the specs:

Integrated Antenna Tuner Specifications

  • Matching Range 80m - 10m: 8.3 Ohms - 300 Ohms
  • Matching Range 160 and 6m: 16.7 Ohms - 150 Ohms

As you can see the tuner is capable of matching resistive loads of at least 3:1 (and higher on most bands).  But for “real-world” loads that are not purely resistive, it would depend on the nature of the reactive component.  For example, my LDG autotuner is “rated” at 10:1 SWR, but for my 160M dipole it will not match a portion of the band although the SWR is under 3:1.