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ZL3AI > APRDIG 10.03.03 16:37l 253 Lines 9952 Bytes #999 (0) @ WW
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Subj: TAPR Digest, Mar 05, 4/5
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From: ZL3AI@ZL3VML.#80.NZL.OC
To : APRDIG@WW
Subject: 3 of 4 APRS balloon launches postponed
From: "Mark Conner" <n9xtn@cox.net>
Date: Wed, 5 Mar 2003 15:05:14 -0600
X-Message-Number: 19
Due to strong high-altitude winds forecast for the 8th, NSTAR, ES-OS, and
HABITAT has postponed their flights to Saturday, March 15th. ANSR in
Arizona is currently planning to fly as scheduled on the 8th at 1600 UTC.
NSTAR will fly from near Omaha, ES-OS near Denver, and HABITAT near Kansas
City.
You can find more information on the following web sites:
NSTAR: http://members.cox.net/mconner1/nstar.html
HABITAT: http://habitat.netlab.org/index.shtml
ANSR: http://www.ansr.org
Mailing lists:
http://groups.yahoo.com/group/KNSP
http://groups.yahoo.com/group/Balloon_Sked
http://groups.yahoo.com/group/ballooning/
73 de Mark N9XTN
------
Mark D. Conner
E-mail: n9xtn@arrl.net
Homepage: http://members.cox.net/mconner1
"Arrogance and stupidity, all in the same package.....how
efficient of you!" - Ambassador Londo Mollari, Babylon 5
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Subject: RE: Linux soundcard modem performance and refernces
From: Miller Scott Contr 30SCS/FTI <Scott.Miller@vandenberg.af.mil>
Date: Wed, 5 Mar 2003 21:29:12 -0000
X-Message-Number: 20
While we're on this subject (and ANY subject is better than the Kenwood
firmware debate!), what cheap soundcards work well with AGWPE? I just
installed it on my XP machine the other day for RX-only on a scanner and it
worked just fine. I think it locked up after a few hours, but that's just
one occurence so I'm not sure if there's really something wrong.
There are tons of generic soundcards available online for $10 or less (I'm
assuming there's no reason AGWPE would need 3D sound or 5.1 Dolby!) but I
don't want to buy one if it's going to have compatibility problems.
I'd run it under Linux, but for the moment my only Linux box at home is an
old Alphastation that's somewhat lacking in horsepower compared to most
modern desktops. Come to think of it, that might give the old SGI something
useful to do, but that's a project for another day.
Scott, N1VG
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Subject: RE: Linux soundcard modem performance and refernces
From: Rich@Osman.com
Date: Wed, 05 Mar 2003 13:44:25 -0800 (PST)
X-Message-Number: 21
AND, do any of the modems work with EMWIN? On the second channel?
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Subject: Re: Kenwood redefines Warranty
From: Jeff King <jeff@aerodata.net>
Date: Wed, 5 Mar 2003 17:12:55 -0500
X-Message-Number: 22
Arrghhh....
You where one of the people that started this nonsense Mark by stating that
the FCC didn't allow users to update the firmware in modern transceivers.
OK, how about this, your right and I am wrong to think that software bugs
should be covered in warranty. It is totally out of line for hams to expect a
minimal level of customer service these days.
This is really what this thread was about, not trying to compare one company
policies to yet another company polices. I conceded to you that it is
entirely possible more then one amateur radio company has a policy of poor
customer service. Yet that doesn't make it right nor IMHO, should we
encourage amateurs to act like sheep and accept this "for the good of the
hobby".
Enjoy your purchase.
--
Jeff King, jeff@aerodata.net on 03/05/2003
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Subject: RE: Linux soundcard modem performance and refernces
From: Rich@Osman.com
Date: Wed, 05 Mar 2003 14:16:55 -0800 (PST)
X-Message-Number: 23
1200 BPS EMWIN is Bell 202 tones sending a compressed synchronous data
stream.
I *beleive* 9600 BPS over-the-air EMWIN is a narrow deviation NRZ FSK
compressed synchronous datastream. I know someone who should know, I'll
ask.
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Subject: RE: Linux soundcard modem performance and refernces
From: "Mark Fellhauer" <sparkfel@qwest.net>
Date: Wed, 05 Mar 2003 16:17:30 -0600
X-Message-Number: 24
At 03:29 PM 3/5/2003, Miller Scott Contr 30SCS/FTI wrote:
>...what cheap soundcards work well with AGWPE? I just
>installed it on my XP machine the other day for RX-only on a scanner and it
>worked just fine. I think it locked up after a few hours, but that's just
>one occurence so I'm not sure if there's really something wrong.
>
>There are tons of generic soundcards available online for $10 or less (I'm
>assuming there's no reason AGWPE would need 3D sound or 5.1 Dolby!) but I
>don't want to buy one if it's going to have compatibility problems.
It depends on what hardware your motherboard can accept. I have found that
the original ISA Soundblaster 16 provides the most compatibility with
soundcard modem type programs. I found a local computer store selling
refurbs for $xx each several months ago. The PCI Soundblaster 16 versions
work with varying success depending on when they are manufactured. I think
you can actually still buy them at Wal-Mart for about $xx.xx
I have a Soundblaster Live Platinum (CT4760) and it works well with AGWPE,
but it locks up when using WACARS after a few minutes. I have not had
much luck using non-Soundblaster cards in soundcard modem applications -
ESS, Ensoniq (pre Creative Labs buyout), Yamaha OPL3 solutions, and Crystal
audio Soundcards all work with varying amounts of success. I have a SIIG
PCI Soundcard chipped with an Ensoniq 1370, and although it's a very nice
basic soundcard, it doesn't work with ANY soundcard modem programs I've
thrown at it...which is probably why I'm holding it in my hand right now...
73,
Mark
KC7BXS
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Subject: RE: Linux soundcard modem performance and refernces
From: "J. Lance Cotton" <joe@lightningflash.net>
Date: Wed, 05 Mar 2003 16:26:15 -0600
X-Message-Number: 25
This sounds like an excellent idea!
The EMWIN transmission from the GOES satellites is 9600 bps using FSK
modulation. I haven't found the specs for the VHF/UHF retransmission of the
data, but I imagine it's probably the same. There are also some feeds at 1200
bps. The current version of usermode soundmodem (0.7) has a modem for FSK
modulated data. I'd try it out this evening if I had a local retransmission of
the EMWIN stream, but all we have here is EMWIN as a subcarrier of a local FM
broadcast station, and I don't have a subcarrier demodulator.
Maybe this would be best passed on to a more technically appropriate group
like linux-hams for now. I will ask on linux-hams and summarize on APRSSIG if
this is possible.
I am not aware of any MS Windows-based soundcard modems for EMWIN. They all
seem to want to sell hardware and windows software for displaying the rx'd
data stream.
-Lance Cotton
Rich@Osman.com wrote:
>AND, do any of the modems work with EMWIN? On the second channel?
--
J. Lance Cotton, KJ5O
http://map.findu.com/kj5o-14
joe@lightningflash.net
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Subject: RE: Linux soundcard modem performance and refernces
From: Dale Huguley <kg5qd@wxsvr.net>
Date: 05 Mar 2003 18:29:30 -0500
X-Message-Number: 26
On Wed, 2003-03-05 at 17:26, J. Lance Cotton wrote:
>This sounds like an excellent idea!
>
>The EMWIN transmission from the GOES satellites is 9600 bps using FSK
>modulation. I haven't found the specs for the VHF/UHF retransmission of the
>data, but I imagine it's probably the same. There are also some feeds at 1200
>bps. The current version of usermode soundmodem (0.7) has a modem for FSK
>modulated data. I'd try it out this evening if I had a local retransmission of
>the EMWIN stream, but all we have here is EMWIN as a subcarrier of a local FM
>broadcast station, and I don't have a subcarrier demodulator.
>
>Maybe this would be best passed on to a more technically appropriate group
>like linux-hams for now. I will ask on linux-hams and summarize on APRSSIG if
>this is possible.
>
>Iam not aware of any MS Windows-based soundcard modems for EMWIN. They all
>seem to want to sell hardware and windows software for displaying the rx'd
>data stream.
>
>-Lance Cotton
Lance & the Sig-
The problem with EMWIN demodulation is that it is not in packets that a
regular tnc (or soundmodem) can use. At a very low level it can be
demodulated, but the raw data stream needs to be sent to a Emwin type
decoder (1116 byte chunks if I remember right). There was some work on
this by the Amrad Group in the Washington DC area for Linux a couple of
years back. Any work on the 9600 baud end will be obsolete in a year or
so when the modulation technique is changed anyway.
73 de kg5qd Dale
----------------------------------------------------------------------
Subject: RE: Linux soundcard modem performance and refernces
From: "J. Lance Cotton" <joe@lightningflash.net>
Date: Wed, 05 Mar 2003 17:36:27 -0600
X-Message-Number: 27
Dale Huguley wrote:
>Lance & the Sig-
>The problem with EMWIN demodulation is that it is not in packets that a
>regular tnc (or soundmodem) can use. At a very low level it can be
>demodulated, but the raw data stream needs to be sent to a Emwin type
>decoder (1116 byte chunks if I remember right). There was some work on
>this by the Amrad Group in the Washington DC area for Linux a couple of
>years back. Any work on the 9600 baud end will be obsolete in a year or
>so when the modulation technique is changed anyway.
>
>73 de kg5qd Dale
Oh well. It was a good idea, if only for providing some sort of the
service that you give to the APRS-IS, but for those without an Internet
connection.
--
J. Lance Cotton, KJ5O
Three Step Plan: 1. Take over the world. 2. Get a lot of cookies. 3. Eat
the cookies.
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