Re: [wsjt-devel] WSJT-X v1.9.0-rc3: Testing of FT8 DXpedition Mode

[Tsutsumi T. <ja...@ou...>]

Hi everyone,

A surprised movement was happened on September 09 concerning JA bandplan reform.

More than 136 public comments from JA stations, requesting to add 80m band to their original 160m band plan reform stated in my previous memo, forced Japanese regulation agency to include 80m and 75m bands as well.

Their claims are based on FT8 operation incompatibity, neither Voice nor CW.  This means FT8 is the driving force to change JA bandplan.

I hope the reform will be implemented as soon as possible and make Bill easy when he will revise default working frequencies.

Regards,

take

de JA5AEA

Windows 10 版のメール<https://go.microsoft.com/fwlink/?LinkId=550986>から送信

________________________________
差出人: Tsutsumi Takehiko <ja...@ou...>
送信日時: Wednesday, July 17, 2019 6:18:07 PM
宛先: WSJT software development <wsj...@li...>
件名: Re: [wsjt-devel] WSJT-X v1.9.0-rc3: Testing of FT8 DXpedition Mode

---This is not old WSJT-X v.1.9.0-rc3 topic and is opening 1838-1843kHz topic for WSJT-X service in Japan----

Hi everyone,

It has been more than a year after writing the status of allocation on 160m band last year and I am glad to inform to all of world WSJT favorites a good news that Japanese regulatory agency has recently released their official intention in public to start the study on the possible band plan reform for radio amateur service on MF band (author’s note: 160m band) from this fiscal year based on the trend of existent commercial radio services (author’s note: reduction of radio buoy service) . In fact, this announcement is their response to  on my inquiry submitted in June this year asking to inform the  progress which they had  promised last year.

In Japan, this type of announcement means that they have already completed their pre-study and got their internal consensus to open 1838-1843kHz for us.

Historically, this is the major opening action on 160m after the allocation for CW band spectrum i.e. 1810-1825kHz in year 2000 and the first action to allocate narrow-band digital spectrum based on the sprit of international harmonization along with IARU region I and II.

Here, I especially thank JARL to lobby the agency with fully understanding of our WSJT-X users expectation and also the development team, especially Bill Sommerville, G4WJS, who kindly changed 80m default frequency for JA and encouraged me to work on 160m spectrum in 2017. I know he faced a lots of criticism and difficulty from the rest of the world at that time.

The agency has not yet told us about the exact opening date but I personally expect it will be at the end of this year or so.

Regards,

take

de JA5AEA

Windows 10 版のメール<https://go.microsoft.com/fwlink/?LinkId=550986>から送信


________________________________
差出人: Tsutsumi Takehiko <ja...@ou...>
送信日時: Friday, March 30, 2018 1:54:29 PM
宛先: WSJT software development
件名: Re: [wsjt-devel] WSJT-X v1.9.0-rc3: Testing of FT8 DXpedition Mode

Hi,

In this thread, I see a few comments related to JA spectrum allocation. Thus, I summarized the status as follow for your reference.

1907.5-1912.5KHz (total 5kHz) is allocated to narrow band digital. Therefore, both daily WSJT-X and DX pedition would be split mode.  Daily FT-8 split QSO QRG is 1840/1908. For DX pedition mode, we are flexible as long as TX spectrum is with in above 5kHz range.

Goa for JA operators is to open IARU harmonized narrow band digital chunk i.e. 1838-1843KHz. Therefore, I expect DX pedition mode will be selected in this 5kHz range as well.

I have been lobbying both to regulation body (MPT) and to JARL from last summer to allocate 1838-1843kHz for us. I learned that it has been allocated to fisheries radios service (radio buoyes)  but there is no license issued in this chunk. JARL, as official lobbyist, is telling me that they are also requesting to open the chunk but they are pessimistic about my expectation to be opened by the end of this year.

I see a few comments in this thread to explore current CW band for DX pedition. In this case, it is nice for us to consider 1810-1825kHz which is allocated to CW mode, neither 1826.5kHz nor 1830-1835kHz mentioned in this thread. Then, it will be an easier deal for us as the players are limited to within radio amateur society.

As summary, it is a fact that we have to use split mode on 160m anyway. Thus, I hope split mode feature is also well tested and practiced under “FT8 Dxpedition mode release candidates timeframe”.

Regards.

take

de JA5AEA

Sent from Mail<https://go.microsoft.com/fwlink/?LinkId=550986> for Windows 10