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ZL3AI > APRDIG 20.12.03 09:25l 277 Lines 9145 Bytes #999 (0) @ WW
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Subj: TAPR Digest, Dec 17, 2/4
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From: ZL3AI@ZL3VML.#80.NZL.OC
To : APRDIG@WW
Subject: Re: Holiday Traveling = 144.39 CTCSS 100
From: "Bruce Martin, KQ4TV" <aprssig@almostanywhere.com>
Date: Wed, 17 Dec 2003 06:31:30 -0600
X-Message-Number: 6
On Wednesday, December 17, 2003, at 02:06 AM, WA8LMF2@aol.com wrote:
>In a message dated 12/16/2003 7:53:33 AM Pacific Standard Time,
>kallen2@bellsouth.net writes:
>
>>Can I presume that when the ctcss 100 is engaged
>>on both sides (xmit and rx), that the only APRS traffic that will
>>make
>>it into my radio (TMD-700) are the ones from stations also using the
>>100
>> ctcss tone?
>
>No. The TNC takes it's RX audio from a point in the radio BEFORE the
>CTCSS-controlled audio stage. All not having a PL tone on the
>incoming signal will
>do is prevent it from being heard in the speaker. The TNC will
>decode it
>just fine.
>
>This is the whole point of Bob's voice alert function -- normal packet
>operation proceeds silently but any nearby PL'd mobile (voice or data)
>on the freq
>WILL be heard.
Will the voice alert work with a Kenwood TM-V7A where the TNC (or
TinyTrak) is connected to the TNC port?
I am taking a trip to D.C. over the holidays and will be in my wife's
van (V7A equipped) instead of my truck (D700 equipped).
Bruce, KQ4TV
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Subject: Re: Open source licensing
From: Henk de Groot <henk.de.groot@hetnet.nl>
Date: Wed, 17 Dec 2003 14:21:41 +0100
X-Message-Number: 7
Hello John,
At 19:34 16-12-2003 -0500, John Ackermann N8UR wrote:
>Further, if I buy a TNCX, there's nothing that John can do to prevent me
>from selling that unit to someone else, from reverse engineering the
>circuit from the board, or from creating an independent hardware
>implementation of that circuit (though I may need a "clean room" to do it
>right). Reverse engineering, so long as you don't violate an intellectual
>property right, is perfectly legal.
I'm just curious. I'm not a lawyer but I thought that the DMCA prohibited
reverse engineering to a large extend, can you still do this without
violation of the DMCA?
Kind regards,
Henk.
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Subject: Re: Open source licensing
From: "John R. Ackermann N8UR" <jra@febo.com>
Date: Wed, 17 Dec 2003 09:22:26 -0500
X-Message-Number: 8
Hi Henk --
The DMCA does many things (many of which I pretty strongly disagree with,
but that's another story!). The most controversial one is the
"anti-circumvention" provision which says that it's a criminal offense to
break a "reasonably effective" mechanism that is protecting copyrighted
content. So, it does prohibit reverse engineering, but only of content
protection mechanisms. Some folks have tried to stretch it, but we don't
yet have court interpretations about how far the prohibition extends.
There is actually a reverse engineering exemption to the anti-circumvention
provision, which allows you to reverse engineer to discover interfaces for
the purpose of interoperability. This is similar to the reverse
engineering provision in the European Union copyright directive. However,
the wording of the provision is limited to software and doesn't allow you
to reverse engineer to get access, e.g., to movie content.
73,
John
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Subject: Re: Power Poles Double Duty
From: "Joe B. Dorn" <joedorn@stonemedia.com>
Date: Wed, 17 Dec 2003 09:38:52 -0600
X-Message-Number: 9
I had one of the RS plugs short on me in September while on an extended
trip. I had to do a lot of re-fusing before I could get all of my toys
working again. It took awhile before I located the problem and each time I
put new fuses in another problem occurred. When in travel mode I have
several items (two GPS units, Laptop with StreetAtlas, tracker etc. etc.
etc.) depending on the cigarette lighter 12v distribution.
Because of this, I am installing an Anderson power pole distribution panel
and considering a second battery in my Suburban, a work in process...
Joe Dorn, Belton, Texas
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Subject: Re: Holiday Traveling = 144.39 CTCSS 100
From: Bob Bruninga <bruninga@usna.edu>
Date: Wed, 17 Dec 2003 12:21:26 -0500 (EST)
X-Message-Number: 10
On Wed, 17 Dec 2003, Bruce Martin, KQ4TV wrote about Voice Alert:
>>The TNC takes it's RX audio from a point in the radio BEFORE the
>>CTCSS-controlled audio stage. [Packets] not having a PL tone on the
>>incoming signal will...[NOT be] heard in the speaker.
>>The TNC will [still] decode it just fine.
>>
>>This is the whole point of Bob's voice alert function -- normal packet
>>operation proceeds silently but any nearby PL'd mobile (voice or data)
>>on the freq WILL be heard. [Its like a radar or IFF ping]...
>
>Will the voice alert work with a Kenwood TM-V7A where the TNC (or
>TinyTrak) is connected to the TNC port?
Good question. One would hope those external ports are connected directly
to the discriminator at a constant level point and before the squelches.
Try it and let us know. Thanks
Bob
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Subject: Weather warning
From: "Scott Miller" <scott@opentrac.org>
Date: Wed, 17 Dec 2003 09:56:50 -0800
X-Message-Number: 11
Not sure if this one got gated to APRS, but it's even more alarming than
that gravity wave one:
RGENT - WEATHER MESSAGE
NATIONAL WEATHER SERVICE KANSAS CITY-PLEASANT HILL MO
1055 AM CST WED DEC 17 2003
....TEST...TEST...TEST...
..UNUSUALLY HOT WEATHER HAS ENTERED THE REGION FOR DECEMBER...AS THE
EARTH HAS LEFT ITS ORBIT AND IS HURLING TOWARD THE SUN.
MOZ012-021-172251-
ANDREW MO-CLINTON MO-
1055 AM CST WED DEC 17 2003
....EXCESSIVE HEAT WATCH IN EFFECT FROM THIS AFTERNOON TO LATE
TONIGHT...
UNUSUALLY HOT WEATHER WILL OCCUR FOR AT LEAST THE NEXT SEVERAL DAYS
AS THE EARTH DRAWS EVER NEARER TO THE SUN. THEREFORE...AN EXCESSIVE
HEAT WATCH HAS BEEN POSTED.
STAY TUNED TO NOAA WEATHER RADIO AND OTHER LOCAL MEDIA FOR FURTHER
DETAILS OR UPDATES.
$$
HEINLEIN
Scott
N1VG
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Subject: Re: Weather warning
From: dale huguley <kg5qd@wxsvr.net>
Date: Wed, 17 Dec 2003 18:37:03 +0000
X-Message-Number: 12
Scott Miller wrote:
>Not sure if this one got gated to APRS, but it's even more alarming than
>that gravity wave one:
Yep- went out as if it were real
>URGENT - WEATHER MESSAGE
>NATIONAL WEATHER SERVICE KANSAS CITY-PLEASANT HILL MO
>1055 AM CST WED DEC 17 2003
>
>
>...TEST...TEST...TEST...
would have been ignored because of the . . .TEST. . . except -
see below:
>.UNUSUALLY HOT WEATHER HAS ENTERED THE REGION FOR DECEMBER...AS THE
>EARTH HAS LEFT ITS ORBIT AND IS HURLING TOWARD THE SUN.
They had fips codes with no ". . .TEST " in the sub-section - looks
perfectly sensible to a computer-
>MOZ012-021-172251-
>ANDREW MO-CLINTON MO-
>1055 AM CST WED DEC 17 2003
>
>...EXCESSIVE HEAT WATCH IN EFFECT FROM THIS AFTERNOON TO LATE
>TONIGHT...
>
>UNUSUALLY HOT WEATHER WILL OCCUR FOR AT LEAST THE NEXT SEVERAL DAYS
>AS THE EARTH DRAWS EVER NEARER TO THE SUN. THEREFORE...AN EXCESSIVE
>HEAT WATCH HAS BEEN POSTED.
>
>STAY TUNED TO NOAA WEATHER RADIO AND OTHER LOCAL MEDIA FOR FURTHER
>DETAILS OR UPDATES.
>
>$$
>HEINLEIN
Was that Robert Heinlein ?
73 de kg5qd Dale
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Subject: Re: Weather warning
From: dale huguley <kg5qd@wxsvr.net>
Date: Wed, 17 Dec 2003 18:42:34 +0000
X-Message-Number: 13
Scott Miller wrote:
>UNUSUALLY HOT WEATHER HAS ENTERED THE REGION FOR DECEMBER...AS THE
>EARTH HAS LEFT ITS ORBIT AND IS HURLING TOWARD THE SUN.
Interesting side note - as told to me by Clyde Tombaugh - discoverer of
Pluto-
It takes more energy to go toward the Sun than away from it if you start
from the earth.
We have a lot of momentum in our orbit- we would have to slow up a lot
to get to the Sun.
73 de kg5qd Dale
----------------------------------------------------------------------
Subject: Re: Weather warning
From: "Scott Miller" <scott@opentrac.org>
Date: Wed, 17 Dec 2003 10:52:53 -0800
X-Message-Number: 14
>Interesting side note - as told to me by Clyde Tombaugh - discoverer of
>Pluto-
>It takes more energy to go toward the Sun than away from it if you start
>from the earth.
>We have a lot of momentum in our orbit- we would have to slow up a lot
>to get to the Sun.
Yeah... people don't seem to understand that you can't just 'drop' something
into the Sun from Earth orbit. And speaking of Heinlein, I always thought
it was odd that he was totally off on launch site choices. He picked Pike's
Peak as his fictional moon mission launch site because of the altitude, when
in reality everyone launches from as close the equator as possible if you're
going to equatorial orbit - you pick up an extra 1,000 mph or so from the
Earth's rotation. Doesn't really help polar launches like ours here at
Vandenberg, though.
Scott
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