[CALV-AUXCOMM] Digital Mode Practice

[Abraham Nehemias]

That’s all great info!

Just had a quick conversation with someone doing a POTA activation in GA
cool stuff! Thanks for the demo. I don’t think I am ready for any
contesting or competitions, but if a more frequent get together in person
or not happens to ring out the bugs out keep people practiced I am in.

On Fri, Feb 23, 2024 at 10:36 Shawn Donley <n3ae at comcast.net> wrote:

> Abe,
>
> Hard to tell from your screen shots as I can't see what mode you have
> FLDIGI set to.  Most, but not all, digital modes you'll hear on HF are
> either PSK31, FT8 or RTTY.   These days, FT8 seems to dominate.   FT8 is a
> digital mode designed especially for working with very weak signals.
> Originally, the application was moon bounce but when it became available
> for HF, interest took off.  For FT8, you need a different software
> package   https://sourceforge.net/projects/wsjt/
>
> PSK31, while less popular than it once was, can still be found, usually on
> the frequencies listed below.  FLDIGI can both receive and transmit PSK31.
>
> *PSK31 Frequencies*[5] <https://en.wikipedia.org/wiki/PSK31#cite_note-5>
> [6] <https://en.wikipedia.org/wiki/PSK31#cite_note-6>
> Frequency <https://en.wikipedia.org/wiki/Frequency> Amateur Band
> <https://en.wikipedia.org/wiki/Amateur_radio_frequency_allocations>
> 1.838 MHz 160 meter <https://en.wikipedia.org/wiki/160_meter>
> 3.580 MHz 80 meter <https://en.wikipedia.org/wiki/80_meter>
> 7.035 MHz* 40 meter <https://en.wikipedia.org/wiki/40_meter> *(region
> <https://en.wikipedia.org/wiki/International_Amateur_Radio_Union#Regional_organisation>
> 3
> <https://en.wikipedia.org/wiki/International_Amateur_Radio_Union#IARU_Region_3>)*
> 7.040 MHz* 40 meter <https://en.wikipedia.org/wiki/40_meter> *(regions
> <https://en.wikipedia.org/wiki/International_Amateur_Radio_Union#Regional_organisation>
> 1
> <https://en.wikipedia.org/wiki/International_Amateur_Radio_Union#IARU_Regions_1>)*
> 7.070 MHz* 40 meter <https://en.wikipedia.org/wiki/40_meter> *(regions
> <https://en.wikipedia.org/wiki/International_Amateur_Radio_Union#Regional_organisation>
> 2
> <https://en.wikipedia.org/wiki/International_Amateur_Radio_Union#IARU_Regions_2>)*
> 10.142 MHz 30 meter <https://en.wikipedia.org/wiki/30_meter>
> 14.070 MHz 20 meter <https://en.wikipedia.org/wiki/20_meter>
> 18.097 MHz** 17 meter <https://en.wikipedia.org/wiki/17-meter_band>
> 21.080 MHz* 15 meter <https://en.wikipedia.org/wiki/15_meter>
> 24.920 MHz 12 meter <https://en.wikipedia.org/wiki/12_meter_band>
> 28.120 MHz 10 meter <https://en.wikipedia.org/wiki/10_meter>
> 50.290 MHz 6 meter <https://en.wikipedia.org/wiki/6-meter_band>
> 144.144 MHz
> 2 meter <https://en.wikipedia.org/wiki/2_meter>
>
> FT8 is typically found on the frequencies shown below, but if some rare DX
> is operating FT8, they will typically go to a nearby frequency so as not to
> QRM everyone else in a pileup.  JS8Call is an FT8 varient that allows more
> data to be sent, like actual conversations.  FT8 is sort of a robot.  All
> it does it connect to a station and automatically send and receive a signal
> report, then disconnect.
>
> Common Frequencies for FT8 & JS8Call
> Band <https://en.wikipedia.org/wiki/Radio_spectrum#Bands> Frequencies (MHz
> ) IARU Region
> <https://en.wikipedia.org/wiki/International_Amateur_Radio_Union>
> FT8 JS8Call <https://www.sigidwiki.com/wiki/JS8>
> 160m 1.840 1.842 All
> 80m 3.573 3.578 All
> 60m 5.357
> 40m 7.056   Region 1
> 7.071
> 7.074 7.078 All
> 30m 10.132 10.130 Region 1
> 10.133
> 10.136   All
> 20m 14.071
> 14.074 14.078 All
> 14.090   Region 1
> 17m 18.100 18.104 All
> 15m 21.074 21.078 All
> 21.091
> 12m 24.915 24.922 All
> 10m 28.074 28.078 All
> 6m 50.310
> 50.313 50.318 All
> 50.323 50.328 All / Intercontinental DX
> <https://en.wikipedia.org/wiki/DXing>
>
> RTTY or radio teletype, has been around for decades but is still used.
> FLDIGI can receive and transmit it, but there are a flock of other software
> programs as well like MMTTY.
>
> RTTY is typically found on the frequencies shown in the link below.
>
> https://www.aa5au.com/rtty/rtty-sub-bands/
>
> Finally, sometimes you can identify the digital mode being used by its
> characteristics on the waterfall or by ear.  See:
>
> https://www.sigidwiki.com/wiki/Signal_Identification_Guide
>
> 73
> N3AE
>
>
>
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