[aprssig] Solar Powered Digi

[Eric Christensen]

Mark,
You are missing the point.  The digipeater that Bob is describing would only listen to 144.990 and thus would not be listening to out of area traffic.  Thus, only 2-5%.

Eric KF4OTN 

-----Original Message-----
From: "Mark A. Lewis" <mark at siliconjunkie.net>
Sent: Dec 23, 2004 10:59 AM
To: TAPR APRS Mailing List <aprssig at lists.tapr.org>, jj at aprsworld.net
Subject: RE: [aprssig] Solar Powered Digi

There are some big assumptions in that. Our local digi on 144.39 does
not hear much non local traffic. Saying that TX load would only be 2-5%
because it is local only is very dependent on geography and if it can
hear other digis from where it is. 

-----Original Message-----
From: aprssig-bounces at lists.tapr.org
[mailto:aprssig-bounces at lists.tapr.org] On Behalf Of Robert Bruninga
Sent: Wednesday, December 22, 2004 11:16 AM
To: jj at aprsworld.net; aprssig at lists.tapr.org
Subject: Re: [aprssig] Solar Powered Digi

A real power-saver on SOlar Powered Digis:

If you need a digi in an area, but cannot afford the huge solar power
system to keep it on the air most of the time, consider making it an
ALT-INPUT digi on 144.99 instead of a full service digi on 144.39.

The TX load will be 2 to 5% of what it would be if the input was on
144.39 because it will only digipeat the locals that need it, and not
the 98% of other digipeater traffic coming at it from all directions.

Your digi will listen on 144.99 for locals and low power trackers
(probably fewer than a dozen) but will still digipeat them over to
144.39 to join the network.

Just a thought for some special applications...
bob


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