QSK in V3

  • 1
  • Problem
  • Updated 11 months ago
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?
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Igor Rybin

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Posted 11 months ago

  • 1
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N5LB - Lionel B

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I use QSK all the time on 251. Works fine at 25 to 30 same antenna. Curious about feedback on V3.
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Sergey, R5AU

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For me looks good on my 6700 with 3.0.27
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Igor Rybin

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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!
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Mark Erbaugh

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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