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PA2AGA > HDDIG 20.06.00 04:08l 223 Lines 7769 Bytes #-9436 (0) @ EU
BID : HD_2000_170D
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Subj: HamDigitalDigest 2000/170D
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Sent: 000619/2008Z @:PI8HGL.#ZH1.NLD.EU #:53018 [Den Haag] FBB $:HD_2000_170D
From: PA2AGA@PI8HGL.#ZH1.NLD.EU
To : HDDIG@EU
Date: Mon, 19 Jun 00 17:51:09 MET
Message-Id: <hd_2000_170D>
From: pa2aga@pe1mvx.ampr.org
To: hd_broadcast@pa2aga.ampr.org
X-BBS-Msg-Type: B
From: Steve Sampson <ssampson@usa-site.net>
Subject: N0ZO no longer supports Keyboard inputs!
Hank Oredson wrote:
>
> So my link to WB1DSW would only require something like
> 200- 400 repeaters. Gee, that's useful!
Well, I'm sorry, I could have drawn you a picture so you
could understand the concept, but most here frown on
binaries.
Depends on whether you want more than 30 baud effective.
If you do, the internet connection would replace the
200- 400 repeaters. The radio would be for local access
and linking.
Steve
------------------------------
Date: Sun, 18 Jun 2000 18:46:56 GMT
From: "Hank Oredson" <horedson@att.net>
Subject: N0ZO no longer supports Keyboard inputs!
"Steve Sampson" <ssampson@usa-site.net> wrote in message
news:394D16FA.9A5559C6@usa-site.net...
> Hank Oredson wrote:
> >
> > So my link to WB1DSW would only require something like
> > 200- 400 repeaters. Gee, that's useful!
>
> Well, I'm sorry, I could have drawn you a picture so you
> could understand the concept, but most here frown on
> binaries.
>
> Depends on whether you want more than 30 baud effective.
> If you do, the internet connection would replace the
> 200- 400 repeaters. The radio would be for local access
> and linking.
What internet?
We are talking about emergency communications, and communications
to places that do not have telephones. See the thread topic.
Um ... my HF links get a lot more than 30 baud effective.
That's the "modern technology" thing you always harp on.
What's important is BPS not baud ... but you know that, right?
--
... Hank
http://horedson.home.att.net
------------------------------
Date: Sun, 18 Jun 2000 18:30:53 GMT
From: "Hank Oredson" <horedson@att.net>
Subject: N0ZO no longer supports Keyboard inputs!
"Steve Sampson" <ssampson@usa-site.net> wrote in message
news:394D0F89.3E99ECB8@usa-site.net...
> Hank Oredson wrote:
>
> [snip]
>
> > Part-15 equipment can only be
> > used to link very small areas (e.g. neighborhoods). What is needed
> > during a large disaster (e.g. the Loma Prieta earthquake in California)
> > is the ability to communicate in and out of the area.
>
> Trunk solutions are the way to go:
>
> The distance covered is actually quite good. The rules are basically
> 1 dB of gain reduction (after 6 dB) for every 3 dB of antenna gain.
> That means that 1 Watt (30 dBm) can go into a no gain Omni, but power
> must be reduced 1 dB (to .8 Watts) for a 9 dB gain Omni (6 Watts ERP,
> and heck, that's better than my Alinco handheld).
> I have a system in operation that covers about 5 miles and is roof-top
> height. Given any altitude the range would easily double with the
> 27 dBm into 20 dB gain antennas (that's almost 50 Watts ERP if my
> math isn't way off).
So my link to WB1DSW would only require something like
200- 400 repeaters. Gee, that's useful!
--
... Hank
http://horedson.home.att.net
------------------------------
Date: Sun, 18 Jun 2000 19:02:51 GMT
From: "Hank Oredson" <horedson@att.net>
Subject: N0ZO no longer supports Keyboard inputs!
"Paul Keinanen" <keinanen@sci.fi> wrote in message
news:6msokscqmvuggkr58j9aos3gc569hkggba@4ax.com...
> On Sat, 17 Jun 2000 23:45:39 GMT, "Hank Oredson" <horedson@att.net>
> wrote:
>
>
> >> >Can I retain my link with WB1DSW (Oregon to New Hampshire)
> >> >using Part-15 devices?
> >>
> >> The real question is: what *value* do you add to the Amateur Radio
> >> Service and the hobby, by maintaining said link?
> >
> >Earth to Steve: Emergency communications capability.
> >That is one of the values provided by Amateur Radio.
>
> I still do not understand the value of that coast to coast link.
>
> Does the mid-West often get hit by a full scale nuclear war or hit by
> a huge meteorite miraculously saving all the forwarding stations,
> their operators and power supplies ? What information is so important
> that it must be transmitted coast to coast and when it finally
> arrives, is it of any value anymore ?
Perhaps everyone who posts to this newsgroup is unaware of what
hams in the US can (and do) do in cases of emergency. Here are some
guidelines we use in this part of the country.
Emergencies where communications by hams can be valueable fall
into three basic types:
1. Local. The example here is a train derailment in a remote area,
which caused a toxic liquid spill into a stream feeding the water
supply of a medium sized city. The place where the wreck occured
was quite remote, up one of the many valleys in the Cascade
mountains. Most emergency services radios did not work from this
remote location. Hams set up a portable voice repeater at the
mouth of the valley, and took HTs up to the wreck site. This provided
the needed communication. This kind of emergency occurs several
times each year.
2. Regional. The example here was flooding in the coast mountains
a couple years ago. Although each of the emergency services agencies
had radio contact with their own people, they could not communicate
between each other. Again a portable voice repeater was placed on
a ridge above the main area of flooding, and a ham with an HT was
assigned to each agency. Issues were things like coordinating the
destruction of a major road to allow flood waters to drain, which
needed discussion between the contractor running the D-9, the state
governers office, fire and rescue, the Red Cross, etc. This worked out
quite well ... and the state has since installed a "joint trunked radio
system"
which allows any agency to patch through to any other agency.
This kind of emergency occurs every few years.
3. Major. The example here has not (yet) happened, but will some day.
The PNW is subject to rare periodic large earthquakes. Magnitudes
usually between 7.5 and 8.5, but larger quakes are possible. The last
quake occured MORE than one repeat interval ago, so the probability
of a quake is higher than "usual". Repeat interval is 200-300 years.
The expectation is that there will be no remaining communication,
power, or travel infrastructure. Cell towers and power line towers
will be on the ground. One or more major dams will breach, washing
away several small cities on the Columbia river. There will be on the
order of 100,000 dead and 300,000 injured. There will be no drinking
water. Most, if not all, ports will be destroyed or seriously damaged.
This is much like your "asteroid" scenario. What hams can do is provide
HF communications out of area to get the intial assesment to the agencies
that can help. HF because the places we would need to communicate
with are state capitols of nearby states (200-600 miles) and to Washington,
DC (1700 miles). We all hope this emergency does not take place ...
.. but if it does, hams will be available, and have the equipment, to help.
--
... Hank
http://horedson.home.att.net
------------------------------
Date: Sun, 18 Jun 2000 16:17:48 -0500
From: Steve Sampson <ssampson@usa-site.net>
Subject: N0ZO no longer supports Keyboard inputs!
Hank Oredson wrote:
>
> We are talking about emergency communications, and communications
> to places that do not have telephones. See the thread topic.
Yes, there you go. Communications to the nearest infrastructure
with the highest transport bandwidth.
Steve
------------------------------
Date: Mon, 19 Jun 2000 00:09:16 +0300
From: Paul Keinanen <keinanen@sci.fi>
Subject: N0ZO no longer supports Keyboard inputs!
On Sun, 18 Jun 2000 19:02:51 GMT, "Hank Oredson" <horedson@att.net>
wrote:
>1. Local. The example here is a train derailment in a remote area,
To be continued in digest: hd_2000_170E
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