From: Charles E. Gelm (wxqhlt.pdzwxxe@auctionwatch.ro)
Date: Mon Jan 08 2001 - 02:55:18 EET
Hi, Chris:
a. Has noting to do with hardware [except radio, feedline, antenna].
b. Every TNC-2 clone I am familiar with; KPC-[124], MFJ-127[04],
run on 12 volts. I'm guessing that the PACCOM tiny-2 would be
amount the lowest power TNC-2 clones. There are also serial and
parallel port modems (baycom) that get their power from the
PC/laptop. There are many new hardware items available,
now-a-days.
c. A baycom serial or parallel port kit, or a sound card used as a
modem would, probably, be amoung the cheapest.
d. Others should be able to help you here. I've never gotten linux
to use a radio device. :-(
HTH, Chuck
Chris Leishman wrote:
>
> Charles,
>
> Actually, I'm designing a L3 protocol and associated software to run on top of
> a broadcast link-layer.
>
> ATM I'm trying to identify hardware that is capable of:
>
> a) doing a reasonable distance (hopefully 10km or more)
> b) easily mobile - no large antenna, reasonably low power requirement (must run
> on 12V)
> c) not too expensive ;)
> d) works with linux & AX.25
>
> That being said, I'll have a look at the software you've been talking about
> and see if they have anything (info or product) that may be of use to me.
>
> Thanks,
>
> Chris
>
> On Sun, Jan 07, 2001 at 07:22:50PM -0500, Charles E. Gelm wrote:
> > Hi, Chris:
> >
> > It sounds to me like you are looking for software or firmware.
> > Software/firmware does the broadcasting.
> >
> > Sending radio signals over variable terrain is less affected
> > by modulation [digital, cw, am, fm] than it is by hardware
> > [power, elevation(30MHz and above), antenna gain].
> >
> > You cannot be heard on the other side of a mountain by
> > changing your modulation scheme.
> >
> > For broadcasting of data, look up A.P.R.S.
> > (Amateur Position Reporting System) and weather-node.
> > These digital schemes broadcast data and can display
> > data from other 'nodes.
> >
> > HTH, Chuck
> >
> > Chris Leishman wrote:
> > >
> > > Hi all,
> > >
> > > I'm looking at doing some work with packet radio for a comm's system I'm
> > > prototyping (potentially for a post grad project) - and I was wondering if
> > > people could suggest appropriate hardware (or tell me if I'm on the wrong
> > > track).
> > >
> > > Basically I'm looking for something to enable broadcasting of data to any
> > > other node in >10km radius over variable terain (preferably not
> > > just line-of-sight stuff). Bandwidth does not have to be large. Hopefully
> > > something that works with linux/AX.25. It also needs to be mobile - on both
> > > land and in the air.
> > >
> > > Does anyone know of something that might be suitable?
> > >
> > > Regards,
> > >
> > > Chris
> > >
> > > ------------------------------------------------------------------------
> > > Part 1.2Type: application/pgp-signature
>
> --
> ----------------------------------------------------------------------
> Knuth: premature optimisation is the root of all evil.
> ----------------------------------------------------------------------
> Reply with subject 'request key' for GPG public key. KeyID 0xB4E24219
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