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ZL3AI > APRDIG 16.03.04 12:51l 284 Lines 9567 Bytes #999 (0) @ WW
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To : APRDIG@WW
TAPR APRS Special Interest Group Digest for Sunday, March 14, 2004.
1. Re: High speed data - actually 100kbs is pokey these days
2. Re: High speed data
3. Re: High speed data
4. Re: High speed data
5. Re: High speed data
6. Re: High speed data
7. Re: High speed data
8. Re: High speed data
9. Re: High speed data
10. Radar mosaics: .geo and .inf files
11. Re: High speed data
12. Question for the group... Solid wire vs Stranded
13. RE: Question for the group... Solid wire vs Stranded
14. Re: Question for the group... Solid wire vs Stranded
15. Re: High speed data
16. RE: Question for the group... Solid wire vs Stranded
17. Re: Question for the group... Solid wire vs Stranded
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Subject: Re: High speed data - actually 100kbs is pokey these days
From: Bill Vodall - WA7NWP <wa7nwp@jnos.org>
Date: Sat, 13 Mar 2004 22:38:17 -0800 (PST)
X-Message-Number: 1
On Sat, 13 Mar 2004, Brian D Heaton wrote:
>How about a Metricomm Ricochet GS 900Mhz modem with a 1 watt amp and a
>PDA or small embedded PC board? I've been buying the modems themselves
>for less than $10 each....
Ssssshhhh. You're giving away our secret.
Note they are already 1 watt. Maximum legal power for use with no license.
No silly content or encryption requirements. Buy one for all your
interested neighbors. Everybody can play.
No - can't look at the source code in Linux and figure out how to make
these in to an APRS style UDP broadcaster. Impossible. No way. Can't be
done. Not a chance. ;)
73,
Bill - WA7NWP
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Subject: Re: High speed data
From: "Larry" <zcopters@comcast.net>
Date: Sun, 14 Mar 2004 0:43:19
X-Message-Number: 2
If ICOM is successful with D-STAR, they believe there will be tons of folks
that will migrate to 1.2 GHz. It all depends on how much Hams want 128 kb/s
data. If they just want digital AMBE voice with simultaneous 2400 bps data,
then they will probably opt for VHF/UHF digital voice D-STAR radios. Only
time will tell.
Lary
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Subject: Re: High speed data
From: "Robert Bruninga" <bruninga@usna.edu>
Date: Sun, 14 Mar 2004 07:24:32 -0500
X-Message-Number: 3
>>if you want true high speed data, such as 128 kb/s,
>>or data combined with voice,...you might want to
>>consider the ICOM D-Star ID-1 radio...
>Would be great, except I'd be all alone up there. Now, if we
>could ALL move there it might be something worth considering.
What I am having a hard time with is how we would best use all that data
while mobile. Sure, it's great for PC to PC connections. And if one has a
NAVIGATOR in a two-man mobile, I guess, the link woiuld be very valuable...
but otherwise, a mobile can only handle so much info before he is
overloaded and wants LESS...
Just wondering...
Bob
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Subject: Re: High speed data
From: "Steve Slay - KC5MVY" <snslay@swbell.net>
Date: Sun, 14 Mar 2004 06:53:23 -0600
X-Message-Number: 4
>What I am having a hard time with is how we would best
>use all that data while mobile.
How about real time weather RADAR for storm spotters?
Steve Slay
KC5MVY
Where am I now? http://tinyurl.com/i4ia
See the weather RADAR http://tinyurl.com/i4i7
Try this one http://tinyurl.com/i3ni
"Only two things are infinite, the universe and human stupidity, and I'm not
sure about the
former." Albert Einstein
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Subject: Re: High speed data
From: Dale Huguley <kg5qd@wxsvr.net>
Date: Sun, 14 Mar 2004 13:02:59 +0000
X-Message-Number: 5
Steve Slay - KC5MVY wrote:
>How about real time weather RADAR for storm spotters?
Steve and All-
Actually Weather Radar can be transmitted via 1200 baud- just not on a
shared channel. Many EMWIN retransmission sites insert local radar into
the data stream. The difference is that the data is one way and continuous-
much better throughput.
73 de kg5qd Dale
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Subject: Re: High speed data
From: Steve Dimse <k4hg@tapr.org>
Date: Sun, 14 Mar 2004 08:14:57 -0500
X-Message-Number: 6
On 3/14/04 at 6:53 AM Steve Slay - KC5MVY <snslay@swbell.net> sent:
>How about real time weather RADAR for storm spotters?
There are some ways to get this through a lot of cell phones:
http://www.findu.com/cgi-bin/r?k4hg-8
This is optimized for display on my Samsung A-500 cell phone through Sprint
Vision, where it looks great!
You can use this or you can use radar-find.cgi and cut any size and zoom you
want, see the web site documentation for the specific parameters.
Steve K4HG
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Subject: Re: High speed data
From: Earl Needham <needhame1@yucca.net>
Date: Sun, 14 Mar 2004 07:21:54 -0700
X-Message-Number: 7
At 05:24 AM 3/14/2004, Robert Bruninga wrote:
>>>if you want true high speed data, such as 128 kb/s,
>>>or data combined with voice,...you might want to
>>>consider the ICOM D-Star ID-1 radio...
>
>>Would be great, except I'd be all alone up there. Now, if we
>>could ALL move there it might be something worth considering.
>
>What I am having a hard time with is how we would best
>use all that data while mobile.
I wasn't thinking of a way to send data to a mobile, but as a way to allow
more stations to be on APRS without the bandwidth problems we're seeing in
the big cities now, on 1200 bps.
Earl
Earl Needham, KD5XB, Clovis, New Mexico DM84jk
SETI@Home: 11399WU/7.4yrs
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Subject: Re: High speed data
From: "Rich Garcia" <k4gps@bellsouth.net>
Date: Sun, 14 Mar 2004 10:59:26 -0500
X-Message-Number: 8
I think the D-Star is a great idea but I think time will tell that not too
many hams are willing to spend $1200 each radio. I looked into them as a way
to do the "final mile" to my repeater site so I can run IRLP and a Igate
directly at the site with DSL from my home. When I found out the cost I said
forget it... $500-$600 a radio and I can see this to take off like wildfire
but $1200 (or $2400 a path) is a bit pricy for most hams!
Rich
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Subject: Re: High speed data
From: Bill Vodall - WA7NWP <wa7nwp@jnos.org>
Date: Sun, 14 Mar 2004 09:24:39 -0800 (PST)
X-Message-Number: 9
>I wasn't thinking of a way to send data to a mobile, but as a way
>to allow more stations to be on APRS without the bandwidth problems we're
>seeing in the big cities now, on 1200 bps.
Go to another frequency and get rid of the digipeaters and duplicate
packets they cause.
We're found that when you remove all the extra packets and resend
things on a clear channel, it makes a big difference. What seems
cluttered and crowded on 144.39 becomes clean and sane and not
even that busy.
73,
Bill - WA7NWP
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Subject: Radar mosaics: .geo and .inf files
From: Gerry Creager N5JXS <gerry.creager@tamu.edu>
Date: Sun, 14 Mar 2004 15:24:14 -0600
X-Message-Number: 10
After getting feedback from Steve Dimse and John Beadles, I've made
minor changes to the USrad.geo and USrad.inf files.
Per Steve's request, the sourthern extent of the USrad images was
extended to incorporate his area of interest, the Keys.
Per John's suggestion, the refresh interval, which I'm assuming is in
minutes, was added after the URL for the image.
The site, again, is: http://mesonet.tamu.edu/APRS/
Comments welcome.
73, gerry
--
Gerry Creager -- gerry.creager@tamu.edu
Network Engineering -- AATLT, Texas A&M University
Cell: 979.229.5301 Office: 979.458.4020 FAX: 979.847.8578
Page: 979.228.0173
Office: 903A Eller Bldg, TAMU, College Station, TX 77843
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Subject: Re: High speed data
From: "Doug Younker" <dougy@ruraltel.net>
Date: Sun, 14 Mar 2004 14:40:01 -0600
X-Message-Number: 11
Wouldn't the spotters be better employed spotting? They are the only "real
time " observers of weather events.--73
Doug, N0LKK
dougy@ruraltel.net
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Subject: Question for the group... Solid wire vs Stranded
From: "Mike Yetsko" <myetsko@insydesw.com>
Date: Sun, 14 Mar 2004 22:33:33 -0500
X-Message-Number: 12
Ok, we all know that solid wire with 'push down blocks' is not a good
choice where there is movement or vibration. It's pretty obvious that you
don't want to use that for control wires up a tower to a rotator,
especially if the wire has to move on a secondary rotator.
But where are there some technical pointers as to why?
I mean, I KNOW this stuff. But I can't find it on the web to point someone
else to it. Did a google search for 'stranded vs solid' and vice-versa and
it seems all I get is a bunch of references to RJ-45 crimp on versions. I
did 'vibration' and wires and managed to find some other obscure
references, but still not what I'm looking for in the way of 'evidence'.
And yes, I know, just because it's on the web doesn't make it true or right
or whatever. But, when you're explaining it to someone else, having a web
site that backs you up tends to add a lot of credence to your arguements.
Mike
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