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Is the PA in the 6400M common to HF bands & 6 meter band

joep
joep Member ✭✭
edited June 2022 in Third-Party Software
Getting full power on HF but only 55w on 6 meters running FT8 (50.313) VSWR is 1.65
TX band setting is 100w.
Any other settings to check ?

thank you

Answers

  • KD0RC
    KD0RC Member, Super Elmer Moderator

    Hi Joe, what is your TX DAX level set to?

  • joep
    joep Member ✭✭

    Hi Len....it is set to 50 which is the same setting used on HF bands that gives 100w


    73 joe

  • joep
    joep Member ✭✭


  • KD0RC
    KD0RC Member, Super Elmer Moderator

    Have you tried transmitting into a dummy load? If that gives the same results, then you should probably submit a help desk ticket.

  • J.C. W4QK
    J.C. W4QK Member ✭✭

    You may need to adjust the Audio Transmit Level slider in WSJT-X. I have mine at around 80% for 100W out on 6 meters with my 6400M. Good luck and I hope you find the cause of the issue.

  • Mike-VA3MW
    Mike-VA3MW Administrator, FlexRadio Employee, Community Manager, Super Elmer, Moderator admin

    As a test:

    Set your Tune on the Radio to 100%

    Press Tune and while txing into a dummy load, read the power on your watt meter. If greater than 90 watts, all is ok with the radio and check your audio drive levels. If less, open a support ticket.

    BTW, on audio drive, never exceed -5db on the level meter.


    image.png


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