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SWR Fold Back Issue

K7FU Member
edited November 2018 in FLEX-6000 Signature Series
SWR Folding back in spite of running the internal tuner into my amp. Is there a way to defeat this new addition to this firmware?


  • Bill W2PKY
    Bill W2PKY Member ✭✭
    edited March 2017
    May be helpful to include the amp you are running, band at issue and the interconnect details.
  • Duane_AC5AA
    Duane_AC5AA Member ✭✭
    edited May 2018
    Yes, generally you do NOT want the internal tuner on if you are driving an amp. The amp should have low enough SWR on its input.
  • K7FU
    K7FU Member
    edited January 2017
    Older Dentron MLA2500 with no tuned input.
    Never had a problem until this revision.
  • K2CB Eric Dobrowansky
    K2CB Eric Dobrowansky Member ✭✭
    edited November 2018

    A defeat option is necessary in some instances. I've seen tube amplifier input VSWR swing at times during ssb transmissions, and it can cause drive issues with some VSWR foldback systems.

    The ANAN radios have had issues in this regard, but fortunately OpenHPSDR has a disable option.

    Please add a defeat option if SSDR does not already have it.

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