April 2004 - arrl-odv - reflector.arrl.org

[ARRL-ODV:10442] Re: MT63
by Paul Rinaldo 09 Apr '04

09 Apr '04

Tom, MT-63 is publicly documented at: http://www.arrl.org/FandES/field/regulations/techchar/MFSK.html Paul -----Original Message----- From: Tom Frenaye <frenaye(a)pcnet.com> Sent: Apr 8, 2004 10:27 PM To: arrl-odv <arrl-odv(a)reflector.arrl.org> Subject: [ARRL-ODV:10438] Re: MT63 At 05:57 PM 4/8/2004, you wrote: >Do we have a policy on the use of MT63? I'm having a problem buying into it due >to the wide bandwidth when you can almost do the same thing (KB to KB) with PSK31. > >I'm getting some flack from the field that we (The ARRL) are not supporting its use. I found 42 references to MT63 using the ARRL web site search engine. The first one was the January 2004 QST article written by Steve Ford --> http://www.arrl.org/members-only/tis/info/pdf/0101050.pdf The last paragraph of the MT63 section says: "There is a certain amount of controversy surrounding MT-63 in the amateur community. In the most robust form of MT-63, the signal is quite wide (1 kHz). With crowded conditions in the HF digital subbands today, the movement has been toward narrow signals. PSK31, for example, is only about 31 Hz wide. MT-63 seems to run counter to this trend. Finally, there are legal issues involving the complex MT-63 modulation scheme. As this article was written, the Federal Communications Commission had not declared MT-63 to be a legal mode for US-licensed amateurs." That seems like a good reason to go slowly. In the end the FCC will likely say it's OK as long as the modulation scheme is made public. We'll eventually end up with (HF) modes that vary from nearly zero to whatever AM really is. We haven't had much of the "in between" bandwidth modes until the last few years, either they were quite narrow or quite wide. We have done product reviews of software capable of MT63 --> http://www.arrl.org/members-only/prodrev/pdf/pr0308.pdf We did not even hint that the mode may not be legal in that article. The best I can tell, our policy on the newer modes is to stay out of the way. Several of them, like Pactor-3 have proprietary modulation schemes and are clearly not legal yet, in my view. But the reality is that there is a lot of worldwide and USA use of them the minute they are made available to experiment with. -- Tom ===== e-mail: k1ki(a)arrl.org ARRL New England Division Director http://www.arrl.org/ Tom Frenaye, K1KI, P O Box J, West Suffield CT 06093 Phone: 860-668-5444

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[ARRL-ODV:10441] Re: Interesting
by W5JBP＠aol.com 09 Apr '04

09 Apr '04

http://www.newswithviews.com/Betty/Freauf52.htm

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[ARRL-ODV:10440] Re: Holiday
by Tuck Miller NZ6T (SWD V. Dir) 09 Apr '04

09 Apr '04

Cal Ripken was definitely a class act, but I would also have to put 2 others in that category, Ernie Banks from the Cubs, and most recently, Mr. Padre, Tony Gwynn. 73, Tuck Joel Harrison wrote: > I used to think that, until the cry babies went out on strike, then > almost did it a second time. Since the strike, there has only been one > Major League baseball player that I thought had any class, and Mr. > Ripkin just happened to play at Camden Yards. > > I spend my money on college sports now, where only the coaches make > millions and act like cry babies.......but they get their ass fired > when they piss people off !!!!! > > 73 Joel W5ZN > > > A civilized game, where men have bats and swing them aggressively. > They play on a "diamond" and the goal is to "go home". Great Game. > America's game, really...... > > Chris > -- ************************************************ ARRL The national association for Amateur Radio Remember, Helping Others....Always Worthwhile!! Southwestern Division Vice Director Are you a member yet? If not, please join! Check out the Convention web site at: http://www.hamradio2004.com/swdc2004/ Personal Web Page: http://www.qsl.net/nz6t

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[ARRL-ODV:10439] Re: Holiday
by Joel Harrison 09 Apr '04

09 Apr '04

I used to think that, until the cry babies went out on strike, then almost did it a second time. Since the strike, there has only been one Major League baseball player that I thought had any class, and Mr. Ripkin just happened to play at Camden Yards. I spend my money on college sports now, where only the coaches make millions and act like cry babies.......but they get their ass fired when they piss people off !!!!! 73 Joel W5ZN A civilized game, where men have bats and swing them aggressively. They play on a "diamond" and the goal is to "go home". Great Game. America's game, really...... Chris

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[ARRL-ODV:10438] Re: MT63
by Tom Frenaye 08 Apr '04

08 Apr '04

At 05:57 PM 4/8/2004, you wrote: >Do we have a policy on the use of MT63? I'm having a problem buying into it due >to the wide bandwidth when you can almost do the same thing (KB to KB) with PSK31. > >I'm getting some flack from the field that we (The ARRL) are not supporting its use. I found 42 references to MT63 using the ARRL web site search engine. The first one was the January 2004 QST article written by Steve Ford --> http://www.arrl.org/members-only/tis/info/pdf/0101050.pdf The last paragraph of the MT63 section says: "There is a certain amount of controversy surrounding MT-63 in the amateur community. In the most robust form of MT-63, the signal is quite wide (1 kHz). With crowded conditions in the HF digital subbands today, the movement has been toward narrow signals. PSK31, for example, is only about 31 Hz wide. MT-63 seems to run counter to this trend. Finally, there are legal issues involving the complex MT-63 modulation scheme. As this article was written, the Federal Communications Commission had not declared MT-63 to be a legal mode for US-licensed amateurs." That seems like a good reason to go slowly. In the end the FCC will likely say it's OK as long as the modulation scheme is made public. We'll eventually end up with (HF) modes that vary from nearly zero to whatever AM really is. We haven't had much of the "in between" bandwidth modes until the last few years, either they were quite narrow or quite wide. We have done product reviews of software capable of MT63 --> http://www.arrl.org/members-only/prodrev/pdf/pr0308.pdf We did not even hint that the mode may not be legal in that article. The best I can tell, our policy on the newer modes is to stay out of the way. Several of them, like Pactor-3 have proprietary modulation schemes and are clearly not legal yet, in my view. But the reality is that there is a lot of worldwide and USA use of them the minute they are made available to experiment with. -- Tom ===== e-mail: k1ki(a)arrl.org ARRL New England Division Director http://www.arrl.org/ Tom Frenaye, K1KI, P O Box J, West Suffield CT 06093 Phone: 860-668-5444

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[ARRL-ODV:10437] Re: MT63
by James Weaver 08 Apr '04

08 Apr '04

As those of us even west of NJ await the answer to Coy's question, I will ask a follow-up to it. Has MT63 and its ramifications (including compatibility) been anticipated in our developing transmitted bandwidth regulation proposal? I'm not a technical expert and don't know, myself. Jim W. AMATEUR RADIO: The only fail-safe communications system in the world. ARRL: The reason Amateur Radio is! Jim Weaver, K8JE, Director, Great Lakes Division ARRL 5065 Bethany Rd., Mason, OH 45040-9660, Tel. 513-459-0142, E-mail k8je(a)arrl.org

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[ARRL-ODV:10436] MT63
by n5ok.ok＠att.net 08 Apr '04

08 Apr '04

Do we have a policy on the use of MT63? I'm having a problem buying into it due to the wide bandwidth when you can almost do the same thing (KB to KB) with PSK31. I'm getting some flack from the field that we (The ARRL) are not supporting its use. Coy -- ARRL West Gulf Division Director Coy Day, N5OK 20685 SW 29th St Union City, OK 73090-9726 n5ok(a)arrl.org 405-483-5632

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[ARRL-ODV:10435] PLCA
by Sumner, Dave, K1ZZ 08 Apr '04

08 Apr '04

In a telephone conversation this afternoon, Alan Shark agreed to back away from the "no empirical evidence" claim. He claimed that he was relying on presentations made to him by "honorable people" that there was no "harmful interference." I faxed him five examples of complaints of harmful interference. He also agreed in principle to getting together with us at a BPL site, preferably Manassas because it's nearby, so we can show him what we're concerned about. He also wants to establish a mechanism for technical information exchange, which I have suggested to him would be timely after the demonstration. It remains to be seen, of course, whether the PLCA Web site will be updated to reflect this, and whether he will send a retraction to the WSJ. I doubt the latter, although I will insist on the former if he hasn't taken care of it by early next week. Dave

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[ARRL-ODV:10434] Switchboard trouble in Newington
by Sumner, Dave, K1ZZ 08 Apr '04

08 Apr '04

We're having trouble with incoming calls to the switchboard number, 594-0200, this morning and are working to fix it. If you hear from anyone who has been unable to get through, please suggest either that they try a direct line to an individual or try later in the day. Dave K1ZZ

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[ARRL-ODV:10433] Letter to APCO
by Sumner, Dave, K1ZZ 07 Apr '04

07 Apr '04

One result of last Friday's meeting was the attached letter from President Haynie to APCO President Stile, sent today. Dave K1ZZ <<APCO BPL.doc>>

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