6m meteor scatter project follow on

Robert Bruninga bruninga at usna.edu
Fri Dec 21 09:35:56 CST 2007

No, Im headed to Alabama this afternoon and am avoiding NoVA.
Ill go west through Baltimore to 81 and down.

I guess my overarching question would be whether there are
enough surplus 6m radios throughout the USA to make it possible
for hams to find them.  I know you are doing an outstantding job
at gathering these radios here... Bu I wonder about hamefests..

Or have the prime years when these hit the streets long past.

With all the rage being digital and 800 and now 700 MHz, it
would seem that there should be thousands of low band radios out
there if they are not already scrap.

And for this purpose, they can be old xtal controleld
clunkers...  In fact, most of the need is in RX only for the
APRS igates...

I don't think you sent me your phone number last time.  Send it
and Ill give you a call.   Maybe we will be leaving later this
evening and I could swing by for an eyeball?


> -----Original Message-----
> From: tacos-bounces+bruninga=nadn.navy.mil at amrad.org 
> [mailto:tacos-bounces+bruninga=nadn.navy.mil at amrad.org] On 
> Behalf Of Michael Chisena
> Sent: Friday, December 21, 2007 9:22 AM
> To: tacos AMRAD
> Subject: 6m meteor scatter project follow on
> All, Trying to amend my ways about titling conventions.   
> Bob, are you going to be at Taco's this weekend?   I talked 
> to my boss about this, and that chat generated some 
> enthusiasm. Might need to pick yours and other brains and 
> collect some business cards.   Let me know if and when you 
> want some of these radios to play with.   Keep it safe Mike 
> Michael Chisena <ka2zev at yahoo.com> wrote: 
> 	snips   I am willing to donate two Syntech 1 (older 
> style radios) to this project. Program them up and make them 
> suitable for APRS style packet duty. One for base use, and 
> another for mobile use.   I have three others that can be 
> donated with a 4 week delay while I locate control heads.
> 	I don't travel much out of the area, but some of the 
> guys on the 147.300 are over the road truck drivers. I can 
> see if one of them wants to host the mobile part of the test. 
>   Ideas welcome. Mike 
> ................................................ sniped from 
> the e mail. ................................................ 
> Cc: 'Bob Bruninga ' 
> 	Would this be a great NEW mission for some of these 6m
> 	radios?
> 	Meteorscatter email from devistated areas on 51.63 MHz.
> 	This is now trivial to set up with APRS. All we do is
> 	these radios scattered around the country and hooked to
> 	and the h! ome PC runing any Igate software. Done. 24/7
> 	Monitoring for Email.
> 	First responders in a blacked out area collect outgoing
> 	from senders as needed and put them in a continuous TX
> 	using the normal 15 second
> 	cycle times. Since Meteor scatter is a continuous
> 	process, then as long as the outgoing message has been
in the TX
> 	queue for X minutes, then there is a 99% probability
that it was
> 	received and injected into the internet. Sent, Done.
> 	We can experiment to find out what X is. And there will
be two
> 	values of X. One for use with a 2 dBi gain vertical and
> 	with say a small beam. Of course using 9600 baud would
> 	improve throughput but also GREATLY restrict the number
> 	players. In my mind, since this is a rarely used
potential, it
> 	is better to have higher participation than optimum
> 	Thus, lets just use 1200 baud. And see how well it
> 	Anyone with 6m FM rigs want to try it out?
> 	Best target date for a test will be the upcoming
quandritids on
> 	4 January. Of course, meteor scatter works every day
24/7 and
> 	the only reason for choosing a meteor shower is just to
make it
> 	more fun.
> 	I remember we did APRS MS many years ago (1995) (APRSdos
has a
> 	built-in Meteor Scatter mode) but none of the follow on
> 	implemented it so again, it is another APRS function
lost to
> 	one-way vehicle tracking.. Here are the results back
> 	http://www.ew.usna.edu/~bruninga/meteors.html
> 	Bob, WB4APR
> 	> -----Original Message-----
> 	> From: Bob Bruninga [mailto:bruninga at usna.edu] 
> 	> Sent: Tuesday, December 18, 2007 11:42 PM
> 	> To: bruninga at usna.edu; TAPR APRS Mailing List
> 	> Subject: 6 meter APRS or meteorscater?
> 	> 
> 	> Can someone summarize meteorscatter packet experiments
on 6
> 	meters?
> 	> 
> 	> A sparkplug in our local ham club is putting together
a group 
> 	> of many 100W 6 meter rigs and the only thing I can
think of 
> 	> that would be interesting is to set one up on a 6
meter APRS 
> 	> DX channel to see what gets through on 6 meter MS.
> 	> 
> 	> Is there a beacon-net frequency already functional
> 	> 
> 	> ANy other great ideas for 6 meter applications other
> 	> just FM talk? So many radios, so little time...
> 	> 
> 	> WB4APR
> "You are, what you do, when it counts" 
> The Masso
> "Gravity, the quickest way down" 
> Mayor John Almafi
> "You ever drop an egg, and on the floor you see it break? 
> You go and get a mop so you can clean up your mistake. 
> But did you ever stop to ponder why we know it's true? 
> If you drop a broken egg you will not get an egg that's new?" 
> MC Hawking

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