FT8 only operates on a single frequency on each band,(some bands like 6m etc have two defaults but only one is usually used). There are alternate frequencies for a version of FT8, called JS8Call but that's limited too For 40m FT8 takes place on 7.074MHz USB, and JS8Call is on 7.078 MHz USB).
My only guess is that it's one person either with no idea what they're doing, or with insufficient harmonic suppression... All that to say: Are you sure it's FT8? Because a lot of other modes sound similar. Especially FSK modes like RTTY... Anything that uses Frequency shifting. I guess packet is possible too. There are HF Winlink stations all over the spectrum. But mostly the upper portion of CW or lower of voice, in the vicinity of FT8 frequencies. If you have a waterfall display you can compare the signal to those on this website: https://www.hfunderground.com/wiki/index.php/Signal_Identification Hope that helps! 73! Kori Rahman, WX5KR Houston POTA, President Brazos Valley Amateur Radio Club - Vice-President and Club Call Sign KK5W Trustee Cross Roads Ham Radio Club Fort Bend County EMROG District 14 SW Unit ARES Texas State RACES Cell: (770) 298 8516 [email protected] On Wed, Oct 15, 2025, 9:18 PM Jay Davidson via BVARC <[email protected]> wrote: > Why are people running FT8 right in the middle of CW on 40? > > It’s horrible-overrunning swaths of the band. > > Trying to copy some DX and all I hear under the weak CW tone is someone’s > sound card bleeding over. > > 7.0650 > > I don’t want to hop to FT8 to copy and get their call sign because I’d be > just as bad. > > Idk > > 73, > KJ5HMX > > > Sent from my iPhone > ________________________________________________ > Brazos Valley Amateur Radio Club > > BVARC mailing list > [email protected] > http://mail.bvarc.org/mailman/listinfo/bvarc_bvarc.org > Publicly available archives are available here: > https://www.mail-archive.com/[email protected]/ >
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