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Can the Flex 6500 connect safely to the AL-80B with out an interface?

KD4Y Member
edited October 2018 in FLEX-6000 Signature Series


  • Jon_KF2E
    Jon_KF2E Member ✭✭
    edited July 2018

    From the AL-80B manual...

    "Requires contact closure or sink of +12 Vdc at 100 mA"

    From the Flex Manual...

    "+40 VDC @ 140 mA maximum"

    So yes, it should be safe to connect directly.



  • KD4Y
    KD4Y Member
    edited July 2015
    Thank You Jon!
  • Terry K8EET
    Terry K8EET Member ✭✭
    edited July 2016
    Working for nine months without a problem.
  • KM6CQ - Dan
    KM6CQ - Dan Member ✭✭
    edited October 2018

  • Al K0VM
    Al K0VM Member ✭✭✭
    edited November 2017
    But the AL80B manual does not say that there is not an inductive kick from a relay coil.   Such a kick could easily go beyond 40vdc..  But I have don't have one nor do I have I access to the schematic to tell for sure.

    AL, K0VM

  • Bill -VA3WTB
    Bill -VA3WTB Member ✭✭✭
    edited February 2018
    Tim's response on another post

     Tim - W4TME, Customer Experience Manager

    Official Response

    Here is my advice.  Always use a buffer relay regardless of the amp.  It will be some of the best $40 insurance you ever buy for your radio.

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