[aprssig] Solar Powered Digi

[Ryan Tourge]

If it listens on 144.99 and talks on 144.39, won't it QRM everything
on 39 because it won't know there is traffic there?


On Thu, 23 Dec 2004 12:42:40 -0500 (GMT-05:00), Eric Christensen
<kf4otn at earthlink.net> wrote:
> 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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Ryan Tourge - K2RRT
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