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ATU failing to tune up 60 meters.

Ronald Barber
Ronald Barber Member
edited January 2018 in FLEX-6000 Signature Series
I have been working FT8 on 60 meters with a DX160 OCF Windom antenna and 60 meters was working just fine.
I worked the NAQP SSB with a DX80 over the weekend because it is higher in the air than the DX160.
When I went back to the DX160 to work FT8 the ATU will not tune 60 meters and the SWR is off the chart.
I have tried a hard reset on my Flex 6300 but it will not tune the antenna at all, it just quickly flips on and off.
Any suggestions?


  • Bill W2PKY
    Bill W2PKY Member ✭✭
    edited January 2018
    Try this: Right click on the ATU button and left click "erase ATU memories"
  • Tim - W4TME
    Tim - W4TME Administrator, FlexRadio Employee admin
    edited January 2018
    Here is the issue.  In USB mode, the TUNE carrier is on the suppressed carrier frequency (what is displayed in the slice frequency readout).  60m is a channelized band, so that frequency is technically always a band edge.  If you do a TUNE operation on that frequency, some of the RF emissions are outside of the channel (out of band).

    You need to change to CW to do a TUNE operation or tune up in frequency about 100 Hz and it will work.
  • Ronald Barber
    Ronald Barber Member
    edited January 2018
    Thank you both.
    It worked perfectly and now I am on my way to finishing my WAS on 60 meters.
    Only 26 confirmed more to go!

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