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 check the Help Center for known solutions.
Need technical support from FlexRadio? It's as simple as Creating a HelpDesk ticket.

QSK in V3

Igor  RybinIgor Rybin Member
In Flex 6400, QSK works for the same antenna only for version 2.49 (2.5 did not check), and starting from 3.019 only for different ones. When you turn on one antenna for reception and transmission, QSK is immediately turned off. What is the reason?


  • Lionel Lionel Member ✭✭
    edited March 19
    I use QSK all the time on 251. Works fine at 25 to 30 same antenna. Curious about feedback on V3.
  • Sergey R5AUSergey R5AU Sergey Member ✭✭
    edited July 2019
    For me looks good on my 6700 with 3.0.27
  • Igor  RybinIgor Rybin Member
    edited July 2019

    Problem solved! Tim explained that starting from version 2.5 there is no possibility to work with QSK on one antenna if the ATU is installed and enabled. In my case, Flex 6400 + ATU. That was the problem. When you turn off the ATU, QSK runs on a single antenna. The question is removed!
  • Mark ErbaughMark Erbaugh Member
    edited February 17
    This is for Tim Could you share your explanation with the entire forum? I have other radios that support QSK and it doesn’t, matter wither the ATU In enabled or disabled. Does this imply that the ATU is bypassed on normal receive? Is so, why? Thanks, 73, Mark, N8ME

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.