Welcome to the new FlexRadio Community! Please review the new Community Rules and other important new Community information on the Message Board.
If you are having a problem, please refer to the product documentation or check the Help Center for known solutions.
Need technical support from FlexRadio? It's as simple as Creating a HelpDesk ticket.

What settings to not overdrive during FT8?

Andy - KU7T
Andy - KU7T Member ✭✭

short and simple question. I am new to FT8, have read that I should make sure to not overdrive the radio. I do use DIGU mode.

What DAX TX gain, WSJT-X level and power level do others use?
I use 57, 100 and 100 respectively.  The 57 is the highest before the HF drops below 100W. 

Anything else I should look out for?



  • KY6LA_Howard
    KY6LA_Howard La Jolla, CA. Paris and Sablet FranceMember ✭✭✭
    edited April 2018


    The actual setting vary very much by band, SWR, drive level by DAX, etc, etc etc

    Look at the Mike Gain Meter... Keep it out of the Red

  • Andy - KU7T
    Andy - KU7T Member ✭✭
    edited September 2018
    when you say to keep it out of the red, its not clear to me. Do you mean red, do you mean organge, and do you mean the end of the bar or the peak indicator?  See image with two arrows.  I am thinking to put right arrow (peak indicator) so that it just starts to touch 0db. is that what you mean?


  • Jay Nation
    Jay Nation Member ✭✭
    edited May 2019

    Anything peaking above the 0dB index line is overdriven and digitally distorted.
    The meter display shows both average level, and peak level.
    The peak level indicator is the smaller of the two indicators, to the right side of the average level bar.
    You can raise the level using DAX TX slider until the peak indicator turns red. Once you hit red, then back it down some until it's no longer red.
    You can make single % changes by carefully clicking in the center of the slider trough, to the left and right of the slider's adjustment button/knob. Each click will either add or subtract 1%. You will find a setting that at say ##% is yellow and ##+1% is red. As long as the peak indicator is yellow then your neither overdriven or distorted.


    #FlexRadio IRC chat

       73, Jay - NO5J

  • Tim - W4TME
    Tim - W4TME Administrator, FlexRadio Employee admin
    edited May 2018
    Keep the peak indicator out of the red (far right)

Leave a Comment

Rich Text Editor. To edit a paragraph's style, hit tab to get to the paragraph menu. From there you will be able to pick one style. Nothing defaults to paragraph. An inline formatting menu will show up when you select text. Hit tab to get into that menu. Some elements, such as rich link embeds, images, loading indicators, and error messages may get inserted into the editor. You may navigate to these using the arrow keys inside of the editor and delete them with the delete or backspace key.