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PA2AGA > HDDIG 01.09.00 22:57l 196 Lines 6276 Bytes #999 (0) @ EU
BID : HD_2000_236B
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Subj: HamDigitalDigest 2000/236B
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From: PA2AGA@PI8HGL.#ZH1.NLD.EU
To : HDDIG@EU
Date: Thu, 31 Aug 00 16:47:45 MET
Message-Id: <hd_2000_236B>
From: pa2aga@pe1mvx.ampr.org
To: hd_broadcast@pa2aga.ampr.org
X-BBS-Msg-Type: B
From: "Sarel J. Botha" <sjbotha@email.com>
Subject: Distance?
With one hop, do you mean 1 repeater? The topology between the points is a
bit hilly. The other point is near the coast and so is at sea level. There
is about a kilometer (0.65 miles) difference in height between the 2 points.
Isn't there any way of making sure if it's possible to do what I want? I'm
in South Africa. Anyone know someone down here that does this sort of thing?
Thanks
"Hank Oredson" <horedson@att.net> wrote in message
news:IAQq5.2139$On2.98852@bgtnsc04-news.ops.worldnet.att.net...
>
> "Sarel J. Botha" <sjbotha@email.com> wrote in message
> news:8ogiqe$ks4$1@ctb-nnrp2.saix.net...
> > Is there maybe a non-low-budget way of doing it? How about repeaters?
How
> > many would I need?
> >
> > "J. Hoffa" <J.Hoffa@underground.net> wrote in message
> > news:sqm1udn4t9128@corp.supernews.com...
> > > 64 kb/s, low-budget, and 150 miles are conflicting requirements.
> > >
> > > "Sarel J. Botha" wrote
> > > > Is there a frequency on which I can send data at a decent rate
(64k/s)
> > over
> > > > about 150 miles? I'm looking for very low-budget equipment.
>
> Depends on the geography ... hills in the way?
>
> If there is a clear line of sight path available, then it can be done in
one
> hop, with some expensive gear, perhaps $1000 per end.
>
> I suspect Gary will post details. This was discussed at length a few
> months back.
>
> --
>
> ... Hank
>
> http://horedson.home.att.net
>
>
>
------------------------------
Date: Tue, 29 Aug 2000 19:38:34 GMT
From: nomail@rob.knoware.nl (Rob Janssen)
Subject: Distance?
Sarel J. Botha <sjbotha@email.com> wrote:
>That's just the thing I'm trying to avoid. The local telco has a monopoly
>and makes everything extremely expensive. I'd also like to get a 24/7
>connection instead of a dial-up like ISDN. Staying connected with ISDN 24/7
>over such a distance would be more expensive than getting a leased line.
With radio equipment, your hourly/monthly fee to the telco will be replaced
by a huge one-time investment followed by possibly lower recurring costs for
electricity, maintenance etc. But the break-even point may be quite
distant in the future. Calculate it first.
Also, you may be under-estimating the technical difficulty. Radio amateurs
have not been able to deploy technology like you need on a wide scale.
Sure, it has been designed and it is working, but (comparatively) nobody is
using it. That should be a bit of warning.
Rob
--
+----------------------------------+--------------------------------------+
| Rob Janssen pe1chl@amsat.org | WWW: http://www.knoware.nl/users/rob |
| AMPRnet: rob@pe1chl.ampr.org | AX.25 BBS: PE1CHL@PI8WNO.#UTR.NLD.EU |
+----------------------------------+--------------------------------------+
------------------------------
Date: Tue, 29 Aug 2000 20:42:46 GMT
From: marsgal42@hotmail.com
Subject: Distance?
In article <8oh0lb$sg0$1@ctb-nnrp2.saix.net>,
"Sarel J. Botha" <sjbotha@email.com> wrote:
> That's just the thing I'm trying to avoid. The local telco has a
monopoly
> and makes everything extremely expensive. I'd also like to get a 24/7
> connection instead of a dial-up like ISDN. Staying connected with ISDN
24/7
> over such a distance would be more expensive than getting a leased
line.
One thing you still haven't mentioned: exactly what are you
trying to do?
Laura Halliday VE7LDH "Que les nuages soient notre
Grid: CN89mg pied a terre..." - Hospital/Shafte
Sent via Deja.com http://www.deja.com/
Before you buy.
------------------------------
Date: Tue, 29 Aug 2000 23:13:55 GMT
From: "Hank Oredson" <horedson@att.net>
Subject: Distance?
"Sarel J. Botha" <sjbotha@email.com> wrote in message
news:8oh1b4$svj$1@ctb-nnrp2.saix.net...
>
> With one hop, do you mean 1 repeater? The topology between the points is a
> bit hilly. The other point is near the coast and so is at sea level. There
> is about a kilometer (0.65 miles) difference in height between the 2 points.
Meant no repeaters. That antennas at each end could be seen well in
the clear from each other. If they can't, you will need repeaters placed
such that at each hop there is a visual path between the antennas.
> Isn't there any way of making sure if it's possible to do what I want? I'm
> in South Africa. Anyone know someone down here that does this sort of thing?
I have run across a few hams from S.A. that do digital networking, but
don't think any of them follow this newsgroup right now. Perhaps someone
who does read this can remember who they are ... my mind is blank ...
> Thanks
>
> "Hank Oredson" <horedson@att.net> wrote in message
> news:IAQq5.2139$On2.98852@bgtnsc04-news.ops.worldnet.att.net...
> >
> > "Sarel J. Botha" <sjbotha@email.com> wrote in message
> > news:8ogiqe$ks4$1@ctb-nnrp2.saix.net...
> > > Is there maybe a non-low-budget way of doing it? How about repeaters?
> How
> > > many would I need?
> > >
> > > "J. Hoffa" <J.Hoffa@underground.net> wrote in message
> > > news:sqm1udn4t9128@corp.supernews.com...
> > > > 64 kb/s, low-budget, and 150 miles are conflicting requirements.
> > > >
> > > > "Sarel J. Botha" wrote
> > > > > Is there a frequency on which I can send data at a decent rate
> (64k/s)
> > > over
> > > > > about 150 miles? I'm looking for very low-budget equipment.
> >
> > Depends on the geography ... hills in the way?
> >
> > If there is a clear line of sight path available, then it can be done in
> one
> > hop, with some expensive gear, perhaps $1000 per end.
> >
> > I suspect Gary will post details. This was discussed at length a few
> > months back.
> >
> > --
> >
> > ... Hank
> >
> > http://horedson.home.att.net
> >
> >
> >
>
>
------------------------------
Date: Tue, 29 Aug 2000 23:48:15 -0500
From: "J. Hoffa" <J.Hoffa@underground.net>
Subject: Distance?
Earth Curvature, Cost projection Thoughts:
You want a 150 mile radio link. Let's look at some of the engineering
problems.
Since one station is 1000 metres higher than the other, this means the radio
To be continued in digest: hd_2000_236C
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