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ZL3AI > APRDIG 17.07.03 17:04l 242 Lines 9145 Bytes #999 (0) @ WW
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From: ZL3AI@ZL3VML.#80.NZL.OC
To : APRDIG@WW
TAPR APRS Special Interest Group Digest for Monday, July 14, 2003.
1. Re: packet repeater?
2. One for Ham Radio
3. RE: Radar images
4. How to make 9600 exactly 8x as fast as 1200.
5. Re: How to make 9600 exactly 8x as fast as 1200.
6. Re: How to make 9600 exactly 8x as fast as 1200.
7. Experimental balloon flight today
8. Re: One for Ham Radio
9. Re: packet repeater?
10. Re: [ Wes Johnston ] Re: packet repeater?
11. Re: [ Wes Johnston ] Re: packet repeater?
12. Re: [ Wes Johnston ] Re: packet repeater?
13. Re: [ Wes Johnston ] Re: packet repeater?
14. Balloon over WV heading East!
15. Re: Please...authors...please [was: hidden transmitter problems]
16. Re: Balloon over WV heading East!
17. Re: Balloon over WV heading East!
18. RE: Balloon over WV heading East!
19. Re: hidden transmitter problems - PHGR query
20. Balloon over WV heading East!
21. DX packets
22. Re: Balloon over WV heading East!
23. Re: Balloon over WV heading East!
24. Re: hidden transmitter problems - PHGR query
25. In-Vehicle Terminal
26. Balloon
27. Re: Balloon over WV heading East!
28. Re: Balloon over WV heading East!
29. Re: Balloon over WV heading East!
30. Virginia Balloon NOW!
31. Re: Balloon over WV heading East!
32. Balloon over WV heading East
33. Re: Balloon over WV heading East!
34. Re: Balloon over WV heading East!
35. Re: Virginia Balloon NOW!
36. RE: Virginia Balloon NOW!
37. Re: Balloon over WV heading East!
38. Re: Balloon over WV heading East!
39. RE: Virginia Balloon NOW!
40. Re: Balloon over WV heading East!
41. RE: Virginia Balloon NOW!
42. Re: Balloon over WV heading East!
43. Re: Virginia Balloon NOW!
44. Re: Balloon over WV heading East!
45. balloon snapshot
46. Re: Balloon over WV heading East! - for Bob B.
47. Re: Balloon over WV heading East! - for Bob B.
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Subject: Re: packet repeater?
From: "Bob D." <n2iph@comcast.net>
Date: Mon, 14 Jul 2003 05:00:35 -0400
X-Message-Number: 1
This has been done so there is good info to draw on. K5YKG (then W2HOB),
and a group of Hams in SNJ ran a 2M FM VHF RTTY Repeater many years ago.
This became a FM voice machine sometime in the 70's or early 80's. Later on
when packet was coming into vogue they added a TNC which I believe was
running NetROM but anyway it ran dual purpose 2m voice with a standard
+600KHz split and a packet digi on the output of the repeater pair. I
believe it would also accept AX.25 packet on the repeater input.
The machine was(is) a GE Master II. Lookup Boyds' call (K2YKG)for his
current email address. If he is still on this list maybe he will chime in
otherwise drop him an email, he may be able to offer some help with how
they set this up.
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Subject: One for Ham Radio
From: Bob Bruninga <bruninga@usna.edu>
Date: Mon, 14 Jul 2003 08:44:23 -0400 (EDT)
X-Message-Number: 2
Score one for HAM radio.
Over the weekend I was hearing saturation advertising for the NEXTEL
nationwide "walkie-talkie" feature. Ham radio already has that and its
global!
With IRLP and ECHOlink, we got that. And since I am convinced this is the
future of HAM radio, we got more coming.
With APRS knowing where everyone is automatically, and having global
instantaneous signaling, its only software to let end-to-end users
communicate voice while knowing only the callsign of the other party.
The software sees the called party, checks APRS to see where he is,
compares that to the IRLP/ECHOlink resources and sends APRS messages to
both ends informing them of the nearest IRLP/ECHOlink node and telling
them the frequency.
THe users QSY and the voice call is completed. Now add a PIC processor to
the serial port of the Kenweood D7 or D700 which watches for the QSY
recommendation, and it can automatically QSY the radio over the same
serial port. THus, fully automatic end-to-end global voice on HAM radio.
ALl the infrastructure is in place. All it takes is a little software.
See http://www.ew.usna.edu/~bruninga/avrs.html
I thought of posting about the NEXTEL "walkie-talkie" in response to the
complaints that there is nothing new in HAM radio. We have had Phone
patches for 40 years since the Witchita Autopatch, but the general public
now has cell phones. Now THEY want walkie talkies! We should capitalize
on their marketing blitz and say "Got that! Join HAM radio!"
de WB4APR@amsat.org, Bob
APRS<=>VOICE: http://www.ew.usna.edu/~bruninga/avrs.html
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Subject: RE: Radar images
From: Bob Bruninga <bruninga@usna.edu>
Date: Mon, 14 Jul 2003 09:31:02 -0400 (EDT)
X-Message-Number: 3
What do you think of me sending you my two rinos and you see if you can
get the waypoints out of them. Garmin says it is automatic... different
from what we had heard before ...
bob
On Sat, 12 Jul 2003, B. Hildebrand wrote:
>Yes, the images are working fine now.
>
>Brent KH2Z
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Subject: How to make 9600 exactly 8x as fast as 1200.
From: wes@johnston.net
Date: Mon, 14 Jul 2003 10:06:50 -0400 (EDT)
X-Message-Number: 4
I've been reading some of Bob Bruninga's material on backbones and he has
suggested that WIDE nodes talk to other wide nodes over a full duplex link
on 70cm. Each wide node would have one link transmitter and two (or more)
link receivers. With full duplex links between wides with only one
transmitter on a given frequency within a geographic area, there would be
no collisions.
This got me thinking... Why don't we just run these links at 9600? the big
complaint we have about 9600 synthesized radios is the TXdelay and turn
around time. The TXdelay effectively keeps 9600 baud at an acutal thruput
rate of around 2400. What if we could get rid of the TXDelay? Then a 9600
baud link would *really* be 8 times faster than 1200. We could carry 8x
the amount of data over the 70cm links as our current netowrks do.
It would be a safe assumption that if data was heard the local 144.39
channel at the WIDE node, that it would more than likely need to be
transmitted over the 70cm link. So, we hook up a 555 timer (or
diode-capacitor-npn transistor) to the CD light on any and all TNCs at the
WIDE node. If the CD LED lights up on *any* TNC, it will key the link
radio transmitter for a period of 2 seconds. Yes, dead key it. The time it
takes the incoming packet to finish coming in is > the TXDelay of the link
radio. By the time the link TNC is ready to digipeat the packet, the link
radio is already warmed up and stabilized on frequency. This gives an
effective TXDelay of 0.
Wes
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Subject: Re: How to make 9600 exactly 8x as fast as 1200.
From: Doug Bade <doug@clecom.com>
Date: Mon, 14 Jul 2003 10:45:49 -0400
X-Message-Number: 5
It would be appropriate to monitor the link too, as it may be in
use,otherwise you will just have trash when you do send data...dead key
over other traffic and you get nothing...
Doug
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Subject: Re: How to make 9600 exactly 8x as fast as 1200.
From: wes@johnston.net
Date: Mon, 14 Jul 2003 11:01:48 -0400 (EDT)
X-Message-Number: 6
Well, that's the beauty about this link system Bob dreamed up... there is
only ONE transmitter in any given area. Granted, there could be, but there
SHOULDN"T be anyone else on the output frequency. The biggie here is
COORDINATION. If we coordinate properly, there will be nothing else on the
frequency. Because this is full duplex, we can't hear our TX link
frequency anyway to see if it's busy.
Wes
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Subject: Experimental balloon flight today
From: "Rochte, Robert" <rrochte@gpacademy.org>
Date: Mon, 14 Jul 2003 11:48:52 -0400
X-Message-Number: 7
We launched another solar balloon today -- this one is a solar tetroon (an
inverted tetrahedron). The payload is very basic (so hopefully it will
work!), consisting of a hacked apart Magellan 315, a TTII and a Radio Shack
HTX-200. Batteries are consumer grade lithium cells (AA). Pictures of the
launch should be up later today.
For anyone wishing to track this balloon and possibly aid in the recovery,
it is using my callsign with the "-11" SSID appended, i.e., KC8UCH-11.
Thanks and 73,
Robert
--
Robert Rochte
Director of Information Technology
The Grosse Pointe Academy
171 Lake Shore Road
Grosse Pointe Farms, MI 48236
Tel. +1 313-886-1221 x155
FAX +1 313-886-1418
www.gpacademy.org
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Subject: Re: One for Ham Radio
From: manuel holland <wa5vxi@yahoo.com>
Date: Mon, 14 Jul 2003 09:05:19 -0700 (PDT)
X-Message-Number: 8
UMmm this would mean I have to go out and buy another radio... I dont have
a Kenwood and I suspect many of us on APRS dont have them either.
But, yeah a good idea.
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