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amplifier RF out power

Tom NATom NA Member
No matter where I set the drive power on my flex 6300, the RF out of my tokyo Hi-power HL-450b remains at 100 watts out.  I am not using the ALC, and my SWR is running about 1.1 so there should be no reason for the radio cutting back  Other radios I have will key the amp at it's full output power with the recommended drive. 


  • KF4HRKF4HR Member ✭✭
    edited October 2018
    Tom, be sure you're moving the correct SSDR slider.  One for the Drive Power (modulation modes), and another for the Tune Mode.
  • Craig_KØCFCraig_KØCF Member ✭✭
    edited October 2018
    It sounds like you are not keying the HL-450b. Do you have an RCA cable from the TX jack on the back of the 6300 to the HL-450b? Do you have TX1 enabled in the SmartSDR Radio Setup menu?
    Be sure to set the power output of the 6300 back to 30 watts or so before keying it up.

  • edited March 11
    I think Craig may have it. The 'TX1 to relay' connection (on the ALS-600 anyway) is critical in order for the amp to receive the Tx enable. Good luck !
    JIm, WQ2H

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