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PA2AGA > HDDIG 23.09.99 02:11l 228 Lines 7907 Bytes #-9770 (0) @ EU
BID : HD_99_237F
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Subj: HamDigitalDigest 99/237F
Path: DB0AAB<DB0FSG<DB0PV<DB0MAK<OK0PKL<OK0PPR<OK0PHL<OK0PBB<OK0PAB<HA5OB<
HA3PG<SV1AAW<EA7URC<PE0MAR<PI8VNW
Sent: 990922/2030Z @:PI8VNW.#ZH2.NLD.EU #:1435 [HvHolland] FBB7.00g $:HD_99_237
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To: hd_broadcast@pa2aga
Subject: HamDigitalDigest 99/237F
X-BBS-Msg-Type: B
:SR3DGN :SR3DGO :SR3DLE :SR3DLS
:SR3DZG :SR4DON :SR4DON-1 :SR4DON-2
:SR4DON-4 :SR4DON-9 :SR4MBX :SR6BBS
:SR6BDX :SR6BOX :SR6DBC :SR6DJG
:SR6DOP :SR6DWB :SR6DXC :SR7DBE
:SR9BKR :SR9DIP :SR9DKR :SR9DOL
:SR9KBY :SR9ZAA :SR9ZAA-12 :SR9ZDN
:YO2KJY-5
Twente:PI1THT}
Ok, that's 860 nodes in the table. What do you get on a typical US node?
Rob
--
+----------------------------------+--------------------------------------+
| Rob Janssen pe1chl@amsat.org | WWWhome: http://www.pe1chl.demon.nl/ |
| AMPRnet: rob@pe1chl.ampr.org | AX.25 BBS: PE1CHL@PI8WNO.#UTR.NLD.EU |
+----------------------------------+--------------------------------------+
>.
------------------------------
Date: 20 Sep 1999 02:18:44 GMT
From: Hamish Moffatt <hamish@rising.com.au>
Subject: Help: Shutdown Fault with "Logger"
George T. Baker <w5yr@swbell.net> wrote:
> A lot of us are turning to Logger for its excellent and comprehensive
> PSK31 implementation. I have never used a logging program and probably
> will not use Logger's capabilities all that much, but Bob's PSK31 module
> does a splendid job. I take pride that I introduced him to the spectral
> display as a tuning aid and prodded him into making it part of the
> program. From what I read, that is probably the most liked element of the
> PSK31 module.
How does it differ from the tuning display (waterfall and
instaneous phase display) in the PSK31SBW software from G3PLX? I find
that to be all I need to tune PSK.
I've tried the MixW demo and I admit I'm completely unable to tune
anything with it -- PSK or RTTY. The instructions make no sense to me.
Hamish VK3SB
--
Hamish Moffatt Mobile: +61 412 011 176 hamish@rising.com.au
Rising Software Australia Pty. Ltd. http://www.risingsoftware.com/
Phone: +61 3 9894 4788 Fax: +61 3 9894 3362 USA: 1 888 667 7839
>.
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Date: Mon, 20 Sep 1999 09:39:14 -0500
From: "Charles Brabham" <n5pvl@texoma.net>
Subject: High Speed Packet(128k plus)
pancho <fm2732@my-deja.com> wrote in message
news:7s53qd$8hg$1@nnrp1.deja.com...
> I am a new ham. :) KC7FHI (technician no-code, woohoo!)
> I am interested in packet, but I have managed to pick up on some older
> information about 56k RF modems and such. Even a mention that 128kbps is
> possible through packet. Does anyone have any guidance they can give me?
> I'm interested in packet- just not Charles's version of it (you really
> are long winded.)
Long-winded! I'll have you know that I greatly resemble that remark, sir!
The LandLine Lid, "A" vision is exclusive, only having room for high-speed
packet and tcpip, on the UHF and higher bands that high-speed is possible
on.
The Ham Radio "B" vision is inclusive, embracing all that "A" can come up
with, in addition to the entire spectrum available to hams, and every
protocol hams have been able to devise or emulate for themselves. The sum
total of "A" is just the tip of the "B" iceberg. There are no artificially
imposed limits in "B".
Advice: Don't limit yourself to a vision propagated by antisocial geeks. You
end up sharing their limitations.
Guidance: Transmission of commercial material (such as Internet banners and
ads at the end of E-mail messages) and business communications that make up
most web content are highly illegal over the ham bands.
Happy surfing!
--
73 DE Charles Brabham, N5PVL
N5PVL @ N5PVL.#NTX.TX.USA.NOAM
http://www.texoma.net/~n5pvl
>.
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Date: Sun, 19 Sep 1999 22:50:35 -0700
From: "Hank Oredson" <horedson@att.net>
Subject: Let's look at real numbers for TNC software sales
Gary Coffman <ke4zv@bellsouth.net> wrote in message
news:tinlN9QLyMKyqvyn62g+MzZSipIu@4ax.com...
> Note, an external amplifier is not a good idea. You don't
> need the extra TR delay, and any path that can't be made
> with the 5-10 watts available from the transverter probably
> has too much multipath to be useful anyway (though with
> the FEC now built into the modems, multipath is less of a
> concern).
Gary,
1)
Some folks live out in the country.
Sometimes WAY out in the country.
5-10 watts won't cover the 50-150 mile paths required.
Multipath can be handled by the use of appropriate antennas.
2)
Some of us want to build long haul networks.
100 mile or longer paths are needed.
Got to get the power spread.
Takes aluminium as well as silicon.
The only other choice is to use the internet.
That ain't ham radio. No challenge involved.
So you are saying these modules do not need any tune up?
Just plug everything together, hook to an antenna, it works?
Could you be more specific about the test gear required
beyond your basic solder gun, screwdriver and pliers?
Where does one get these various modules?
What is their cost?
--
... Hank
http://horedson.home.att.net
|
>.
------------------------------
Date: Mon, 20 Sep 1999 16:46:03 -0400
From: Gary Coffman <ke4zv@bellsouth.net>
Subject: Let's look at real numbers for TNC software sales
On Sun, 19 Sep 1999 22:50:35 -0700, "Hank Oredson" <horedson@att.net> wrote:
>Gary Coffman <ke4zv@bellsouth.net> wrote in message
>news:tinlN9QLyMKyqvyn62g+MzZSipIu@4ax.com...
>
>> Note, an external amplifier is not a good idea. You don't
>> need the extra TR delay, and any path that can't be made
>> with the 5-10 watts available from the transverter probably
>> has too much multipath to be useful anyway (though with
>> the FEC now built into the modems, multipath is less of a
>> concern).
>
>Gary,
>
>1)
>Some folks live out in the country.
>Sometimes WAY out in the country.
>5-10 watts won't cover the 50-150 mile paths required.
>Multipath can be handled by the use of appropriate antennas.
Our longest single hop is 90 miles. We do that with 4 watts.
Of course it is a mountain top to mountain top path. On an
obstructed path, all you have is multipath. Usually, you can't
resolve that with antenna orientation or gain because too many
of the multiple paths are in the beamwidth of any reasonable
gain antenna. So you have to engineer paths that clear the
first Fresnel zone.
Paths that don't qualify simply aren't used. That's just good
network engineering practice. That often means that the most
direct path isn't usable, and we have to organize the network
topology to use an alternative routing. Sometimes it means
rural hams are left out of the network unless they want to fund
multiple hops just to serve one station. That's the way it goes.
>2)
>Some of us want to build long haul networks.
>100 mile or longer paths are needed.
But they usually aren't feasible. Over the horizon isn't
tenable for fast amateur data networks. You need to
arrange your system around the idea that the average
hop must be less than 30 miles, or settle for a much
lower data rate where multipath delay doesn't cause
symbols to overlap excessively. In exceptional cases,
like the one noted above, topography may allow a
longer hop, but it will be the exception, not the rule.
You need a BER of under 1 in 10E6 or your network
performance becomes dismal out past 3 or 4 hops.
That means you have to engineer things *right* on
every link.
>Got to get the power spread.
To be continued in digest: hd_99_237G
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