[NLRS] VHF Field Day modes

[kp hpjr]

We have had good rates with RTTY on FD.

Id like to try PSK this year but don't know that I can handle to slow rates! HI

Being an avid meteor scatter guy I'm doubtful I'll play there. I'm guessing activity on MS will be non existent for FD .

Kirk

> Date: Mon, 17 Jun 2013 11:10:53 -0500
> From: n0nas at amsat.org
> To: nlrs at mailman.qth.net
> Subject: Re: [NLRS] VHF Field Day modes
> 
> 
> 
> Thanks Matt. I'll be trying to setup FLDIGI for the W0MR Mining-SPRC
> FD VHF station.
> 
> Is there anyone on the list who would like to comment about the choice
> of digital modes? I suggested PSK31 mostly because it is well known
> and widely used, with good capability for working into the noise.
> 
> Jerry suggested plain old RTTY as a good option and I certainly like
> it as being instantly recognizable when I hear it. And it is known for
> good operation on HF weak paths and works well on FM too. So RTTY
> is another option. Stay with the classic 50 baud 170Hz or 850Hz Baudot
> format....
> 
> I also mentioned MFSK-16 as another mode option. It isn't as well
> known as PSK31 and I don't think it can dig as far into the noise, but
> it does have the advantage of Forward Error Correction (FEC) so you see
> small blocks of text appear as each FEC block is decoded and
> corrected. So if you used MFSK-16 you would know the displayed text was
> accurate.
> 
> The local ARES groups like MT63-2000 for sending digital data over FM
> radios or repeaters. It has FEC and is very fast, but isn't the best
> choice for use over SSB and a weak path.
> 
> I also mentioned using meteor scatter modes, but that would probably
> be for stations who are already familiar with it and maybe have a
> second VHF station. The WSJT software is the main way to go for those
> modes.
> <http://physics.princeton.edu/pulsar/K1JT/wsjt.html>
> 
> There are probably 30 other digital modes that could be used, but that
> just makes the job improbable rather than a good way to increase Q's.
> So it would be handy if just one or two digital modes were used (in
> addition to CW) for Field Day. I don't think transmission speed is a
> primary factor in the selection. I have more interest in pulling out
> weak signals and with FEC for accurate exchanges.
> 
> <http://ww2.amsat.org/?p=678>
> If you really want to add to your challenges, try to grab the
> satellite bonus for making a FD Q via one of the ham satellites. The
> Oscar-50 FM satellite has become very popular for this but its so
> popular it is difficult to make any Q. The linear transponder
> satellites are also very active during FD. If someone in your FD group
> is familiar with working via satellite, it is probably on your
> things-to-do list already. :-)
> 
> And if your FD group doesn't already have an Educational Activity
> lined up to get the bonus points, you could always consider doing
> something about VHF weak signal, roving, 10GHz, SDR, or whatever you
> want. I was going to suggest loading APRSIS-32 on a laptop and
> connecting a radio would let you demo APRS. Or if you have a DVB-T TV
> dongle you can demo SDRSharp and ultra-cheap SDR to the crowd.... Or
> maybe you'd like to do a short demo of SMT soldering? Or just a demo
> of how to install a UHF connector on coax? Everybody knows about
> stuffing the coax into the shell and heating it until it melts. Maybe
> you can demo a better way? Or show them how to make a quarter-wave
> ground plane from a coax connector and a piece of Romax.....
> 
> That's all for now. I tend to get to hyped sometimes. Just get out to
> Field Day and get involved. If you don't know where to go, check the
> ARRL web page FD locator. Just enter your city and state and the map
> will show you what is around the area... I'm surprised to see there is
> nothing showing in central Wisconsin around Eau Claire! If you know
> any local Field Day groups, light a fire under them to put their FD
> site on the map!....
> <http://www.arrl.org/field-day-locator>
> 
> 73, Doug Reed, N0NAS.
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