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ZL3AI > APRDIG 14.08.03 10:11l 257 Lines 9523 Bytes #999 (0) @ WW
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To : APRDIG@WW
TAPR APRS Special Interest Group Digest for Monday, August 11, 2003.
1. Re: VHF APRS Freqs in Arizona
2. D700 Discriminator mod?
3. Mini-DIN on D700a...
4. Re: D700 Discriminator mod?
5. Re: D700 Discriminator mod?
6. Re: D700 Discriminator mod?
7. Re: VHF APRS Freqs in Arizona
8. Re: Anyone know the callsign for???? (Slightly OT)
9. Re: Anyone know the callsign for???? (Slightly OT)
10. Re: Anyone know the callsign for???? (Slightly OT)
11. Re: Anyone know the callsign for???? (Slightly OT)
12. ADMIN: Re: Anyone know the callsign for???? (Slightly OT)
13. Email page for emergency beacons?
14. Re: Email page for emergency beacons?
15. Re: Anyone know the callsign for???? (Slightly OT)
16. Re: D700 Discriminator mod?
17. Re: D700 Discriminator mod?
18. Re: D700 Discriminator mod?
19. South Carolina Digital Day
20. Re: D700 Discriminator mod?
21. Connecting a TinyTrak to a HT
22. Re: D700 Discriminator mod?
23. Re: VHF APRS Freqs in Arizona
24. Re: Connecting a TinyTrak to a HT
25. Re: D700 Discriminator mod?
26. Re: Connecting a TinyTrak to a HT
27. D700 and POCSAG
28. DSC decoding
29. Re: DSC decoding
30. KA0MR?????
31. What sort of APRS packet is this ?
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Subject: Re: VHF APRS Freqs in Arizona
From: "Mark Fellhauer" <sparkfel@qwest.net>
Date: Sun, 10 Aug 2003 23:41:36 -0500
X-Message-Number: 1
At 10:41 PM 8/10/2003, Sean \\The RIMBoy\\" <sean@rimboy.com> wrote:
>Do they make technical suggestions / recommendations etc? ie, preventing
>too many digi's in a certain area? What about unproto paths? To me this
>seems to be the way to keep the ego-digi's and other harmful interference
>problems we've discussed in check. I don't necessarily agree that it's
>the route we need to take, but it would be nice to have the teeth that a
>coordination body has when facing problems. Someone mentioned SERA, but
>they only say that 144.390 is set aside for APRS and nothing else.
ARCA is but one of the bodies in Arizona that helps with packet frequency
coordination. Probably one of the best coordinated states in the U.S.,
IMHO. ARCA gives very little input on local digipeaters, but local users
are vocal and good at exerting gentle pressure on users/abusers. The
APRS'ers in Arizona seem to be a social bunch, too, and most know each
other on sight.
Also remember that Arizona probably has the highest per capita ham radio
licensing in the country with a very technically proficient user base
(Honeywell, Motorola, Intel, Sumitomo, SGS Thompson, Burr Brown/TI, etc.)
plus all the military and retired military. It makes it one of the best
places in the world to be a Ham.
Mark
KC7BXS
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Subject: D700 Discriminator mod?
From: Jim Duncan <jdbandman@earthlink.net>
Date: Sun, 10 Aug 2003 23:46:12 -0500
X-Message-Number: 2
Greetings:
I have a very specialized need to get audio out from a discriminator tap
in the D700. Can anyone supply information on how to bring
discriminator (pre-audio filtering) out of the radio? (Yes, I know this
voids the warranty but mine's been void for 2+ years anyway)
--
73 de Jim, KU0G
Chairman/Coordinator
Kansas City APRS Working Group, W0APR
First Alert Storm Team KMBC-TV9
Mailto:ku0g@kcaprs.org
Webpage: http://www.kcaprs.org
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Subject: Mini-DIN on D700a...
From: Jim Duncan <jdbandman@earthlink.net>
Date: Sun, 10 Aug 2003 23:53:04 -0500
X-Message-Number: 3
Is this connection a pure audio output (since it's used to feed an
external TNC)?
--
73 de Jim, KU0G
Chairman/Coordinator
Kansas City APRS Working Group, W0APR
First Alert Storm Team KMBC-TV9
Mailto:ku0g@kcaprs.org
Webpage: http://www.kcaprs.org
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Subject: Re: D700 Discriminator mod?
From: WA8LMF2@aol.com
Date: Mon, 11 Aug 2003 00:59:10 EDT
X-Message-Number: 4
In a message dated 8/10/2003 9:49:15 PM Pacific Daylight Time,
jdbandman@earthlink.net writes:
>I have a very specialized need to get audio out from a discriminator tap
>in the D700. Can anyone supply information on how to bring
>discriminator (pre-audio filtering) out of the radio? (Yes, I know this
>voids the warranty but mine's been void for 2+ years anyway)
You don't need to get inside the radio at all! The 6-pin MiniDIN connector
already provides access to the raw discriminator output.
Reproducing my previous post on this issue on numerous mailing lists:
The 6-Pin MiniDIN "DATA" or "PACKET" connector is an industry standard
adopted by all the Japanese ham mfrs. The contacts on this connector
provide access to:
TWO kinds of receive audio:
Raw non-deemphasized discriminator output sometimes labeled "9600 Baud
Receive".
De-emphasized squelched audio similar to what come out the speaker, but
at a fixed level unaffected by the volume control. It is sometimes labled
"1200 Baud Receive".
On multi-mode radios (Yaesu FT-817, FT-100, etc), only the 1200 baud output
will be live on AM, SSB or CW since the "9600 baud" output is associated only
with the discriminator of FM receivers.
Receiver Squelch status line (normally no sig-squelch-closed = 0V, signal
active-squelch open = 5V). Sometimes labled "COR", "COS", "RX" or
"Activity".
TX audio input (sometimes misleadingly labeled "TX Data Input") In many
radios, this input can go either into the same channel as the mic input
(but at a higher audio level) for 1200 baud packet, SSTV, EchoLink, etc, or
DC-coupled directly into the TX modulator (for 9600 baud packet) depending
on the setting of an item in the radio's configuration menu.
TX PTT (confusingly labeled "Standby" by Kenwood) -- normal
ground-to-transmit line just like most mic inputs.
Common/Ground.
Note that despite the misleading labels referring to data input and output,
the jack only carries AUDIO, AUDIO, AUDIO! THERE IS NO ACTUAL DATA in
the sense of RS-232 or TTL-level streams of 1s and 0s anywhere on this
connector!!!
This connector is the perfect point to connect packet TNCs, soundcard
interfaces, phone patches, IRLP/EchoLink controllers, paging encoders, or
any other device that needs access to the transmit and receive audio of a
radio.
These audio inputs and outputs are high-level 100-300mV, similar to home
stereo "LINE" input level seen at RCA jacks on tuners, amps, tape decks,
etc, rather the the 5-10mV level seen at most mic input jacks.
On most radios with this port, grounding the DIN-6 PTT line mutes the front
panel mic input to prevent extraneous shack noises from getting mixed with
whatever you feed into the transmit audio input.
An annotated pinout diagram of this connector is on my website at:
http://members.aol.com/wa8lmf/miscinfo
Click through the link on this page which will take you to a directory of
assorted downloadable files, not a web page. Look for the file
MiniDIN6-Packet.pdf
Note that this connector is exactly the same one used on PS/2 keyboard and
mouse cables. A dead mouse is an excellent source of a plug and cable
assembly to mate with the jack on the radio.
Stephen H. Smith wa8lmf (at) aol.com
Home Page: http://wa8lmf.com
Ham Radio/Mobile SSTV page: http://members.aol.com/wa8lmf/ham
APRS Stuff
http://members.aol.com/wa8lmf/aprs
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Subject: Re: D700 Discriminator mod?
From: "Mark Fellhauer" <sparkfel@qwest.net>
Date: Mon, 11 Aug 2003 01:02:26 -0500
X-Message-Number: 5
Just rememeber that not all mice have all pins wired through. Pins 2 and 6
are not required for mouse operation.
I believe pin 2 is for ground and pin 6 is for squelch control on the 6 pin
mini-DIN packet port.
73,
Mark
KC7BS
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Subject: Re: D700 Discriminator mod?
From: "Wes Johnston" <wes@johnston.net>
Date: Mon, 11 Aug 2003 06:55:42 -0400
X-Message-Number: 6
Also, some keyboard cords use ALL 6 connections and a shell ground, and some
only use 5 wires and a shell ground. The omitted wire on some is the 9600
disc out. This means that any keyboard cable can be used for 1200
operation, but only a few "special" ones can be used for 9600 operation.
Wes
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Subject: Re: VHF APRS Freqs in Arizona
From: "Spider" <spider@rivcom.net>
Date: Mon, 11 Aug 2003 06:55:23 -0700
X-Message-Number: 7
Thanks to all that replied. Apparently, the answer to my question is NO,
there are no other APRS VHF freqs other than 144.390 in Arizona.
Jim, WA6OFT
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Subject: Re: Anyone know the callsign for???? (Slightly OT)
From: <maxwell679@cox.net>
Date: Mon, 11 Aug 2003 10:40:46 -0400
X-Message-Number: 8
This is just a bit OT, but I was wondering something from all the hams
here. Does anyone know how to find out a specific persons callsign? I
heard that Joe Walsh from the Eagles is a BIGTIME ham radio nut!!! I just
thought that was really interesting for those of you that are Eagles fans
as well. Anyone know his call??
Martin Maxwell
N7HAB
Phoenix AZ
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