And in the Atlanta area, the usage is different, very different. There are some major simplex nets on some of the other frequencies.
Ed WA4YIH From: [email protected] [mailto:[email protected]] On Behalf Of bruce mallon Sent: Tuesday, April 20, 2010 2:27 PM To: [email protected] Subject: RE: [DSTAR_DIGITAL] Re: ARRL Field Day Rules - 145.67 simplex HERE in TAMPA BAY ..... 146.520 and 147.550 are used all others have little activity on them I in 40 years of being on 2 meters here can't remember any normal use of any others As long as a efford is made to AVOID the common ones and KNOWN net frequencies like 147.550 there is no problem .... That said ...... ECHO LINK in Orlando uses 147.550 and transmits over the top of the net here .... I have a good 2 meter station they know the net is on but they just don't care using a tone to not have to hear the stations. This is what the DIGI USERS need to try and avoid you don't make friends or win over people this way. Bruce --- On Tue, 4/20/10, Woodrick, Ed <[email protected]<mailto:[email protected]>> wrote: From: Woodrick, Ed <[email protected]<mailto:[email protected]>> Subject: RE: [DSTAR_DIGITAL] Re: ARRL Field Day Rules - 145.67 simplex To: "[email protected]<mailto:[email protected]>" <[email protected]<mailto:[email protected]>> Date: Tuesday, April 20, 2010, 1:38 PM David, Just because SERA published it, doesn’t mean that it is true. (or in more specifically, should be used). SERA will be quick to say that they aren’t a frequency coordinating organization, they are a repeater frequency coordinating organization. Some of the frequency listed in the plan below ARE on the FM Simplex frequencies. Others, such as 146.44 are close enough to a FM simplex to cause more pain than if they were on a FM simplex. (A D-STAR signal in half of the pass band of a FM receiver is a PITA!) SERA seems to think that an indiscriminate overlay of digital 20 kHz frequencies over a 30/15 kHz existing spacing won’t cause a problem. That aside, 146.52 is commonly accepted as the national FM simplex frequency / National Calling Channel. Any long term occupation of 146.52 is not in accordance with the gentleman’s agreement by which it was created. The other simplex frequencies, in my book are much more open for fair game. Most D-STAR radios have the ability to decode either FM or D-STAR. This feature should be used when operating on any frequency not established as a standard D-STAR frequency. And from there, standard rules should apply. If the channel has FM listeners, be nice and go somewhere else. If not, I feel that it is fair use. While we, as D-STAR users need to work hard to keep from being known as those “radios that just cause racket with obnoxious operators who don’t care” But on the other hand, FM allocations have sucked up essentially every bit of the 2M spectrum and this should be shared. The existing regulations and agreements only tend to show how narrow-sighted many were when drafting the agreements. SERA for example has listed a “Narrowband FM Digital Repeater” segment of the band. There’s a little terminology problem with FM and Digital in the same phrase. I believe I know what it’s intent was, AX.25 Packet, but to have 18 frequencies set aside for duplex packet is ridiculous. My guess is that there’s only been may a couple in the SERA region ever. So where do they put D-STAR? Splinter channels. Arrggghhh! Ed WA4YIH From: dstar_digital@ yahoogroups. com [mailto:dstar_ digi...@yahoogro ups.com] On Behalf Of David Sent: Tuesday, April 20, 2010 1:05 PM To: dstar_digital@ yahoogroups. com Subject: [DSTAR_DIGITAL] Re: ARRL Field Day Rules - 145.67 simplex In the southeast, we have specific digital simplex frequencies coordinated as so by SERA. Please use them and not frequencies coordinated as packet. FM digital simplex on 2m are: 146.420, 146.440, 146.460, 146.480, 147.420, 147.440, 147.460, 147.480 For 440 use these: 440.9125, 440.9250, 440.9375, 440.9500, 440.9625, 440.9750, 440.9875, 441.0000, 441.0125, 441.0250, 441.0375, 441.0500, 441.0625, 441.0750, 441.0875, 441.1000, 441.1125, 441.1250, 441.1375, 441.1500, 441.1625, 441.1750 For other areas contact you band plan coordinator (and not a mailing list). --- In dstar_digital@ yahoogroups. com<http://us.mc1102.mail.yahoo.com/mc/compose?to=dstar_digital%40yahoogroups.com>, Gary Pearce KN4AQ <kn...@...<http://us.mc1102.mail.yahoo.com/mc/compose?to=kn...@...>> wrote: > > At 10:23 AM 4/20/2010, cybersapient wrote: > >I'm surprised you didn't suggest that the analog FM users on simplex > >simply put a PL tone on- it works in simplex, as well, you know. > > Hi, Shane, > > PL (CTCSS) "works" on simplex technically, of course. But it's not feasible > logistically. > > CTCSS requires what I'll call a "cooperative effort" - everybody has to > know and agree to use it, and agree on a specific tone frequency. On analog > repeaters, cooperation is mandated, at least to access the repeater. > Keeping your own receiver quiet by using tone decode is your choice. > > Do you think that kind of cooperative effort is possible across a broad > range of simplex users (such as you'll find on 146.58, or any of the > band-plan simplex channels)? > > Do you think it can be imposed on simplex operators, as in, "Don't like my > D-STAR digital hash? Well, use CTCSS and don't bother me again."? (Do you > know how many hams don't even know what D-STAR IS yet?) > > That contains all the ingredients you need for a range war, and everybody > loses. > > Separate spectrum exists for simplex (while it is very had to come by for > repeaters). Let's use it, and be good neighbors. We will have to be aware > of packet or other digital activity in the 145.5-145.8 region, and dodge > that when we find it. > > ============ > bruce mallon > <wa4...@...<http://us.mc1102.mail.yahoo.com/mc/compose?to=wa4...@...>> wrote: > > >STAY OFF KNOWN SIMPLEX FREQUENCIES ! It's that simple. > > Closer, Bruce, but here's the rub. Simplex channels (or, what I think you > really meant is "known simplex USE") are "known" mostly by the people using > them regularly, not by the general population surrounding them. > > Here in my medium-size area (Raleigh-Durham NC, 29th TV market, ~1,000,000 > population demographic) , various clubs and ARES groups have suggested that > their members use of one or another simplex channel. There are some ad-hoc > groups of hams who end up on one channel for weeks, months, maybe years. > None keep the channels very busy, but most have a few hams who monitor them > on and off. I know that exists, but I couldn't tell you who's using what > across the region. > > These simplex groups are all way too loose for coordinated CTCSS (except in > the mind of the dedicated urban planner). So I still think that, for now, > we're best off staying off ALL the band plan simplex channels, and > establish our own spot. Though if you think you know a spot above 146 MHz > that is truly vacant, well, enjoy it. > > Maybe some day we'll be established enough to get a spot for digital > simplex in the band plan, but don't hold your breath (and the guys in the > know are now holding their sides and ROTFL - not because we don't deserve > the spectrum, but because they know just how likely ANY "band plan" changes > and recognition are for anything new or different, but that's a whole > 'nother can of worms). > > 73, > Gary KN4AQ > > ARVN: Amateur Radio//Video News > Gary Pearce KN4AQ > 508 Spencer Crest Ct. > Cary, NC 27513 > <mailto:kn4aq@ > ...<http://us.mc1102.mail.yahoo.com/mc/compose?to=kn...@...>>kn...@... > 919-380-9944 > www.ARVideoNews. com<http://www.arvideonews.com/> >
