Jim, In defence of the WSJT team this is not there idea and has not been pursued by them. The origin of the discussion has come from within the IARU band planning sub-committees reviewing data segment global harmonisation opportunities.
To be clear: 1) today the JA amateurs are already using 7041-7044kHz for domestic JA to JA amateur FT8 communications - often at what appears to be quite low power 2) The implication is that 3kHz of the 40m data subband below 7060KHz is already occupied with this activity 3) JA amateurs can not communicate with other JA amateurs on data modes above 7045kHz (a quirk of their radio regulations) 4) As part of seeking to harmonise the 40m band plan globally, and noting the JA regulatory restrictions, IARU is considering a proposal to have the JA to JA domestic FT8 traffic move into 7037-7040kHz - just below the 7040-7040.2kHz WSPR band. That segment is still within the JA domestic 7030-7045kHz data mode sub-band. 5) It would be a relocation - not a consumption of a further 3kHz. As the 3kHz between 7041-7044 has already been actively used for over 2 years now, the loss of 3kHz has already occurred. The material net impact on CW operation therefore is ZERO as 7041-7044 is proposed to simply move to 7037-7040kHz. CW activity of course has full access to the data sub-band as well and so the relocation can be viewed as a bilateral swap between CW and JA domestic FT8 users. Further, this would remain a JA domestic only use of the band - and so the chance of it being widely heard outside of Region 3 and perhaps western region 2 is pretty small. 6) None of this proposal impacts in any way the use of 7074-7080kHz at this time. There are other proposals being considered for that segment considering how to rearrange the band to provide more space for FT8 while not impacting other user groups excessively - but they are separate (mostly) from the initial moves for the JA domestic only traffic FT8 frequency. Hopefully this clarifies the current state of play? Feedback on this is of course most welcomed by IARU. Regards, Grant VK5GR IARU Region 3 HF BPC Chairman -----Original Message----- From: Jim Brown via wsjt-devel [mailto:wsjt-devel@lists.sourceforge.net] Sent: Monday, 27 December 2021 3:43 PM To: wsjt-devel@lists.sourceforge.net Cc: Jim Brown Subject: Re: [wsjt-devel] 40m IARU Proposal for Narrowband Data As a very active CW operator, I view this as a VERY BAD move. The presence of FT4 in that region is a most unwelcome intrusion. I view it as the only major bad judgement call by the WSJT team. 73, Jim K9YC On 12/26/2021 7:44 PM, Tsutsumi Takehiko via wsjt-devel wrote: > Hi, > > ARRL Letter on 09/23/2021 titled “IARU Regio 3 Considers Significant > Expansion of HF Digital Segments” triggered the dialog among JA WSJT > users about the recent activities of IARU bandplan proposal. It is the > great movement establishing “time-synchronized transmission mode > capacity demands” and we must encourage globally harmonized bandplan > implementation as soon as possible. However, I noticed a concern on 40m > proposal by the reason that I have experienced a lots of QRM from > lengthy, high powered and wide band occupied adjacent SSB operation on > 40m at QRG 7074 FT-8 activity and it is not the best allocation for all > narrow band data users as FT-8 is the most favorite and popular format > today. From this aspect, I prefer FT-8 to take the most protected > segment from SSB operation swapping the allocation of Time Sync Data to > 7040~7055kHz, for example 7040kHz. This principle to allocate lower side > to “Time Synch Data” is proposed on 80m. I understand the allocation > rule to prioritize the current allocation explained in the letter saying > “ a global narrowband conversational modes (e.g., PSK) segment between > 7040 and 7044 kHz in alignment with existing Region 1 arrangements” but > that is not future looking and does not convince for me. > > Thus, I wish to hear from the audience of this forum whether it is > painful enough for us to move WSJT i.e. FT-8 segment to 7040~7055kHz > and I must refrain from proposing to IARU R3 at this moment. > > Any comments (from Region 1 especially) ? > > Regards, > > take > > de JA5AEA > > Windows のメール <https://go.microsoft.com/fwlink/?LinkId=550986> から送信 > > > > _______________________________________________ > wsjt-devel mailing list > wsjt-devel@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/wsjt-devel _______________________________________________ wsjt-devel mailing list wsjt-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/wsjt-devel _______________________________________________ wsjt-devel mailing list wsjt-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/wsjt-devel
