FT8 not transmitting on 60 meters using v2.6.2

John Swink

I have been running FT8 on 60 meters channel 3 with my Flex-6600 & SSDR v2.4.9 & WSJT v2.1.2 without any problem.  I recently upgraded to SSDR v2.6.2 and now the radio will not transmit on 60 meters with FT8.  I get the message "TX Inhibit: The transmit frequency is out-of-band".  I have tried changing the displayed frequency on the slice on all five channels but cannot get the radio to transmit on FT8.  It works fine in USB & CW.  Has anyone else experienced the problem and how did you resolve it?

Mike-VA3MW

Hi John

Check your transmit bandwidth and make sure the LPF is less than 2800Hz.   With FT8, you are in a different mode called DIGU.  

Mike

Presley, W5PD

David Decoons, wo2x

Yes, check what Presley said. You cannot use Fake It or Split on 60 meters. The radio MUST stay on the 60 meter frequency exactly and TX bandwidth needs to be checked as Mike stated.

John Swink

Mike-VA3MW

I just set this up on a new installation.

• SmartSDR 3.1.12
• HPF - 150 Hz
• LPF - 2800
• WSJTx 60M freq - 5.357 Mhz
• Split Operation - None

Hit TUNE on WSJTx and it transmitted as expected

It would help if you could post some screen shots of SmartSDR showing the VFO and TX Filter settings so we can see if you might have missed something.

If TUNE and MOX are greyed out, then you are exceeding the bandwidth settings for the channel.  You may also want to check TX Band Settings and make sure you do NOT have PTT Inhibit checked for 60M.

Mike va3mw

John Swink