Re: [wsjt-devel] Proposed FT8 Frequencies for ARRL Field Day

[John K. <joh...@gm...>]

Matthew,

It is an interesting question.  We are going to stick with the *.080
frequency recommendations.  We have suggested that the CW boys and girls
try using their notch filters and "yes" technology marches on and they will
loose a little tiny piece of spectrum.


John

On Wed, Jun 12, 2019 at 7:43 PM Matthew Miller <mmi...@ma...>
wrote:

> Interesting, that's another different data-point for frequencies to use
> (I'm not familiar with that groups.io but I think that site is where I
> had seen talk of checking "the standard frequencies").
>
> And just today there was a big fuss on the repeater a number of guys
> saying how "digital especially FT8 is jamming and spamming over CW stations
> down in the CW part of the band"...so I know I have to be rather careful
> being able to cite why I pick where to use.
>
> Yes - the club I'm in arranges how many stations will be doing what,
> they've got "generally" stations one SSB and one CW per band, and then I'm
> tasked with "digital modes" open ended no band restrictions (well, within
> the field day rules).  I have done RTTY and PSK31 in years past, this year
> I'm hoping to do better with FT8.  Nobody has complained about interference
> from me in the past...but the CW stations always obliterate my digital
> reception and sometimes kill SSB too.
>
> I guess I'll try and build a configuration in WSJTX that has the standard
> frequencies as well as the ones listed in this thread and on the site you
> linked...shame there doesn't seem to be more coordination as to where to
> operate for field day.
>
> -Matt / KK4NDE
>
> -----Original Message-----
> From: Matt Power [mailto:mh...@mi...]
> Sent: Wednesday, June 12, 2019 8:30 AM
> To: wsj...@li...
> Subject: Re: [wsjt-devel] Proposed FT8 Frequencies for ARRL Field Day
>
> > Was there any more recent info on frequencies for field day?
>
> https://groups.io/g/FT8-Digital-Mode/message/2202 has a different plan
> with (for example) 14130 instead of 14080. That might be a better place for
> discussion, because Field Day frequencies for this year probably won't have
> a direct effect on WSJT-X development.
>
> https://www.arrl.org/files/file/Field-Day/2019/2019-Rules-RevA.pdf
> says a club may operate on 20 FT8, 20 CW, and 20 SSB simultaneously (6.3,
> 6.7). Depending on equipment, antenna spacing, and the relative skills of
> the 20 SSB and 20 CW operators, a 20 FT8 signal might interfere with 20 SSB
> more than with 20 CW, Or vice versa.
>
> One question is whether the 14130-versus-14080 choice is important to the
> more common case of clubs who plan to operate 2 (not 3) stations on 20m at
> the same time. For example:
>
> Many clubs have a station tuning around all of 20 SSB (14150 and up) to
> look for new QSOs throughout the daytime. They do this every year.
> Their station isn't big enough to call CQ and run stations on 20 SSB.
> This year, someone wants to add a second 20m station that transmits very
> frequently on 14130. Would that often be a realistic conflict?
>
> Conversely, a club may be historically successful with S&P on 20 CW.
> This year, someone wants to add a second 20m station that transmits very
> frequently on 14080. Is it realistic that they'll make substantially fewer
> CW QSOs on the high end of 20 CW?
>
> Matt, KA1R
>
>
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