The Facebook group FT4 on Sat is helpful if you’re interested in this mode. In the guides section you’ll find the FT4 frequencies that are in common use on a number of satellites: RS-44,435612,145993,USB-D,LSB-D, XW-2A,145667,435048,USB-D,LSB-D, XW-2B,145732,435108,USB-D,LSB-D XW-2C,145797,435168,USB-D,LSB-D, XW-2D,145862,435228,USB-D,LSB-D, XW-2F,145982,435348,USB-D,LSB-D, CAS-4A,145862,435228,USB-D,LSB-D, CAS-4B,145917,435288,USB-D,LSB-D, JO-97,145857,435118,USB-D,LSB-D, AO-109,435762,145888,LSB-D,USB-D TO-108,145917,435288,LSB-D,USB-D FO-29,145998,435,802,LSB-B,USB-D LSB -> UPLINK, USB -> DOWNLINK Ray KN2K
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On Tuesday, October 11, 2022, 4:03 PM, Mike Swiatkowski mjswiatk@gmail.com wrote:
5 kHz is just as good! Maybe better. Let's go with that! Mike, AA9VI On Tue, Oct 11, 2022 at 3:01 PM Mark Johns, K0JM k0jm.mark@gmail.com wrote:
Almost everyone in North America is operating at 5 kHz up from the bottom of the downlink passband. I set my WSJT-x at 435.6115. Once in a while I see somebody CQing beyond the passband, more than 3 kHz up from that frequency, but I don't know if they actually work anybody.-- Mark D. Johns, KØJM AMSAT Ambassador & News Service Editor Brooklyn Park, MN USA EN35hd -----------------------------------------------"Heaven goes by favor; if it went by merit, you would stay out and your dog would go in." ---Mark Twain
On Tue, Oct 11, 2022 at 2:53 PM Mike Swiatkowski mjswiatk@gmail.com wrote:
I read a message from Jerry, N5EKO, that the gentleman's agreement is to operate 3-10 kHz above the bottom band edge. WSJT-X may show you about 2.5 to 3 kHz of passband on a typical computer screen. So, that 7 kHz seems a bit much to monitor all at once. I think it'd be easier to just pick a standard calling offset from the bottom band edge to monitor when the satellite is passing. If we all started listening to +3 kHz to +5.5 kHz USB FT4 mode from the band edge it's a simple rule of thumb and we know where to listen to those signals seemingly under the noise floor. Many users don't have a band scope. So, a designated offset would be helpful. Example: RS-44 Satellite downlink passband is 435.61 - 435.67 MHzListen or CQ by setting SATPC32 satellite (not rig since it changes due to doppler) frequency to 435.613 USB mode and choosing FT4 on WSJT-X
so, the satellite (not rig) downlink frequency for FO-29 = 435.803AO-07 = 145.928 HO-113 = 435.168and so forth for other satellites. Maybe the XWs, CAs, JO-97, and EO-88 birds would be good for FT4, too.
Mike, AA9VIEN52 -----------------------------------------------------------
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