| |
ZL3AI > APRDIG 19.03.03 10:29l 263 Lines 9670 Bytes #999 (0) @ WW
BID : 1035-ZL3AI
Read: GUEST
Subj: TAPR Digest, Mar 16, 2/2
Path: DB0FHN<DB0RGB<DB0FSG<DB0GAP<DB0KFB<DB0CZ<DB0GE<LX0PAC<LX0HST<HA3PG<
HB9OK<IK6PYS<ON0AR<ZL2BAU<ZL3VML
Sent: 030318/1011Z @:ZL3VML.#80.NZL.OC #:61969 [Chch-NZ] FBB7.00i $:1035-ZL3AI
From: ZL3AI@ZL3VML.#80.NZL.OC
To : APRDIG@WW
Subject: Re: How find digipeater in a specific region hundreds of miles away?
From: "Bob D." <n2iph@comcast.net>
Date: Sun, 16 Mar 2003 09:27:49 -0500
X-Message-Number: 4
At 09:40 AM 3/15/03 -0800, Kelly Cushing wrote:
>I would like to establish a path to a specific location in another area. How
>can this be accomplished?
my $0.02;
You may be able to find an RF path to a station HUNDREDS of miles away
but will it be usable/realistic as a path to use from your station is
another question. When you start talking of sending your beacon text or
an object out over a path that spans HUNDREDS of miles you need to
evaluate if that information is of any use to people in the targeted
area HUNDREDS of miles away. Do people need to know where your house is
if they live in NY and you are in Ohio? Is that local thunderstorm or
resource object you may be contemplating uplinking of any use to them?
On the other hand, if you are mobile or portable and looking to
establish a path back to an area via RF then you have an established
need. But I would think that a better, more reliable path would be to
ensure your packets make it out far enough to reach an IGate from where
they will be available from the internet from a number of sources
(findu, aprsworld, the APRSis servers, etc).
With UI-View32 and Andy's free UI-Path add-on you can easily find the
path to a particular station. You can also monitor the traffic through a
station other than yours such as your local DIGI and view a list of
stations which have passed packets through it as well as see the paths
taken. Andy (M0CYP) has written a number of useful add-ons for UI-View
including UI-Traffic (still in beta I believe but working very well)
which is an attempt to implement Bob's (WB4APR) PROBE algorithm for the
purpose of determining channel efficiency.
You can get Andy's free add-ons at www.welcome.to/uiview , UI-View is
available on TAPR's site now supposedly and also from the author (Roger)
at www.ui-view.com . UI-View and the various add-on programs makes a
great APRS system.
73...Bob, N2IPH
------------------------------------------------------------
Join the Ham Radio Operators SETI Team # 8088
http://setiathome.ssl.berkeley.edu/stats/team/team_8088.html
------------------------------------------------------------
----------------------------------------------------------------------
Subject: Re: KPC3 (Not+)
From: John Kraus <flyfisher452@cox.net>
Date: Sun, 16 Mar 2003 10:33:53 -0800
X-Message-Number: 5
And don't forget Digi_Ned either. If you have KISS mode it should work.
----------------------------------------------------------------------
Subject: APRS wx protocol help needed
From: Stan Horzepa <stanzepa@earthlink.net>
Date: Sun, 16 Mar 2003 10:43:06 -0500
X-Message-Number: 6
VE6WTD asked me to post this to the SIG.
Please reply to him, not me.
------ Forwarded Message
From: "Bill Dyer" <dyer@enersul.com>
Date: Fri, 14 Mar 2003 09:33:20 -0700
To: <wa1lou@tapr.org>
Cc: <ve6vdp@rac.ca>
Subject: APRS wx protocol help needed
Stan,
Would you please post the attached to the SIG for input.
73 es Regards,
Bill
VE6WTD
-----Original Message-----
From: ve6vdp@rac.ca [mailto:ve6vdp@rac.ca]
Sent: Thursday, March 13, 2003 8:20 PM
To: cara-digital@yahoogroups.com
Subject: [cara-digital] APRS wx protocol help needed
I wonder if anyone can tell me what is wrong with this weather string ?
044/001g001t43P...h..b....
It shows up on UI-View and FindU but not in XASTIR.
73'
de David VE6VDP
----------------------------------------------------------------------
Subject: Re: KPC3 (Not+)]
From: Bob Nielsen <nielsen@oz.net>
Date: Sun, 16 Mar 2003 07:55:24 -0800
X-Message-Number: 7
(Resent with less quoting, since Lyris ate my first reply)
Ev,
Open-squelch DCD does not necessarily have to be done in the TNC
firmware. Back around 1988, N7CL came up with a very simple (2
resistors and 1 capacitor) hardware mod to a TNC2 which works great for
open squelch operation. I have used this on several MFJ 1270s, although
they can also be used with the squelch open on some radios without
modification, depending on the audio noise characteristics. This works
with any firmware, including UIDIGI and KISS.
See <ftp://tapr.org/software_lib/tnc/dcdmod.txt>.
TAPR sells a DCD mod kit for TNC2s (and a separate one for TNCs with
modem chips other than the XR2211). These will also work for HF DCD as
well as FM-AFSK.
73,
Bob, N7XY
----------------------------------------------------------------------
Subject: RE: Some comments on Mic-E / APRN up and running in Los Angeles
From: "Phil Pacier, AD6NH" <ad6nh@arrl.net>
Date: Sun, 16 Mar 2003 10:40:57
X-Message-Number: 8
WinAPRS software, up to 2.6.1, still does the MicE translations. I have
noticed this from K6TVI for a long time. When I send out a packet on my D7
with a path of WIDE2-2, I usually get about an average of 7-8 hits back,
mostly from the translation. K6TVI is the only IGate (he is RF-Inet only,
but that doesn't turn off MicE translation) still running WinAPRS in the LA
area, but his station is translating a whole bunch of packets!
Phillip Pacier - AD6NH
http://www.aprsca.net
----------------------------------------------------------------------
Subject: Test Please ignore
From: John Kraus <bigjohn45@cox.net>
Date: Sun, 16 Mar 2003 10:40:08 -0800
X-Message-Number: 9
This is just a test to see if the new email accounts are working in KDE.
----------------------------------------------------------------------
Subject: Re: APRS wx protocol help needed
From: "Curt Mills, WE7U" <archer@eskimo.com>
Date: Sun, 16 Mar 2003 11:17:54 -0800 (PST)
X-Message-Number: 10
On Sun, 16 Mar 2003, Stan Horzepa wrote:
>From: ve6vdp@rac.ca [mailto:ve6vdp@rac.ca]
>Sent: Thursday, March 13, 2003 8:20 PM
>To: cara-digital@yahoogroups.com
>Subject: [cara-digital] APRS wx protocol help needed
>
>
>I wonder if anyone can tell me what is wrong with this weather string ?
>
>044/001g001t43P...h..b....
>
>
>It shows up on UI-View and FindU but not in XASTIR.
The temperature field is missing a digit. Xastir would throw that
field out because of it, then toss the whole packet because it didn't
have the required specified minimum four fields that must be present
in a weather packet.
Curt, WE7U. archer@eskimo.com
http://www.eskimo.com/~archer
Lotto: A tax on people who are bad at math. - unknown
Windows: Microsoft's tax on computer illiterates. - WE7U.
The world DOES revolve around me: I picked the coordinate system!"
----------------------------------------------------------------------
Subject: Re: How find digipeater in a specific region hundreds of miles away?
From: "Kelly Cushing" <kellycu@attbi.com>
Date: Sun, 16 Mar 2003 17:32:09 -0800
X-Message-Number: 11
Thanks Bob, I will checkout Andy's UI-Path, auspicious as I am already using
UI-View. Let me explain the basis for the question. The thought was to
discover a method to transmit a river level measurement of a distant river
back to my home. After all want to float it when the water level is right.
----------------------------------------------------------------------
Subject: KPC3, the KPC3+, and other TNCs
From: "John Langtry, VE3NEC" <ve3nec@sympatico.ca>
Date: Sun, 16 Mar 2003 23:51:15 -0500
X-Message-Number: 12
Folks,
There has been much "pen'd" on the above topic, and I thought that I'd
throw in my $ 0.01 CDN worth on topic.
The original KPC3 used a T.I. modem chip (TCM3105), which used the real
"standard" Bell 202 tones, i.e 1200 Hz Mark and 2200 Hz Space. Saddly,
Texas Instruments has let this I.C. pass off into history. (For a
digipeater, open squelch, it also required, the a DCD modification,
available from both PacComm and TAPR. The 3105 was very poor at figuring
out "noise" from valid data.) With the modification, it was really
excellent !
The current KPC3+ uses the TDK TSC 73M223 chip as its modem, but it's NOT
Bell 202, it's V.23. Here, this standard is Mark is 1302 Hz (vs 1200) and
2097 (vs 2200) for the Space tone - Close, but as they say, "no cigar".
It does work quite well for a home station, with good clean, strong
signals; but for a "digipeater" - Well, personally, I was very
disappointed. (The few Hz difference and the fading associated with a
mobile station; It was like night and day, up at our repater site; the
modified KPC3 verses the KPC3+.)
At the time, a couple of yeats ago, when I proposed this issue to our SIG,
and I was *told*, in no uncertain terms, by the manufacturer "To keep my
"opinions" to myself." And I have - I merely offer, for your consideration,
my observations, as one Amateur to another.
To date, I have done so.
On the "other" TNC front, since neither of the above TNCs can support
either Marco's IW3FQG, UIDIGI code - nor my my original SLIP (now called,
KISS) code, another thought for your consideration.
The original TAPR2 (MFJ's, GLB-2, PacComm, and many others) use the Z-80
processor [the KPC's use some odd ball from Hitachi] and they use the Exar
2206 / 2211 chipset - Bell 202 is standard.
Yes, you can use any of these TNC's with open squelch, as the 2211 has a
really good DCD built into the chip. Yes, these TNC's will require some
minor modifications; to mate it with the radio. But having done so, for
many digi's up here in VE-land, it's all worked rather well; certainly much
better than anything yet available in Canada, from Kantronics.
Just another bean for the pot, when considering building a "wide" area
digipeater.
My vy 73 to all of you, de John VE3NEC
905-873-8715 (home)
905-790-2051 (salt mine)
---
END OF DIGEST
Read previous mail | Read next mail
| |
