Jim, FYI - Neil and James don't believe a clear frequency matters based on past conversations I have had with them. I contend they have never tried chasing DX where every path starts at 8000 miles (ie out of VK). The standard FT8 channels are so congested these days that trying to target working particular stations can be futile because I can't find (and don't know) a clear RX slot at the other end of the path to try calling on. I have called it the "hidden transmitter" syndrome in a conversation with Joe K1JT in the past, but he didn't seem to understand the reference (it was an old description of CSMA problems we used to have on AX.25 packet nets when not everyone could hear everyone). A similar situation impacts the decision making when picking a channel to transmit on today in FT8 - which notably Phil Karn KA9Q also has picked up on in some of his recent posts to the list.
As for the choice of 40m FT4 frequency - I had quite animated arguments with Bill Somerville about it - and all logic fell on deaf ears. Through my IARU global HF band planning reform proposals I am hoping we can finally address that injustice. Best regards, Grant VK5GR IARU R3 HF Band Planning Chair On Mon, Oct 11, 2021 at 2:20 PM Jim Brown via wsjt-devel < wsjt-devel@lists.sourceforge.net> wrote: > On 10/10/2021 7:12 PM, Neil Zampella via wsjt-devel wrote: > > as F/H specifically requires you to reply to a Fox CQ above 1000 hz, and > > since the decoder decodes the entire passband based on the base > > frequency set, you would not need any 'waterfall history' to determine > > where to Tx your reply. > > Sure we do -- we want to choose a relatively clear frequency to TX, and > you need that history to make that judgement call. And smart operators > will occasionally skip TX for a sequence to see what might have changed. > > I had exactly that experience working S9OK today on 12M. Although > they're not running F/H, they are multi-streamed using other software. > By making what turned out to be a good choice of TX, I worked them with > two calls from NorCal, an 8,000 mile path. > > 73, Jim K9YC > > > > > _______________________________________________ > wsjt-devel mailing list > wsjt-devel@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/wsjt-devel >
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