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ZL3AI > APRDIG 15.05.04 20:52l 277 Lines 9496 Bytes #999 (0) @ WW
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Subj: TAPR Digest, Apr 30, 2/6
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From: ZL3AI@ZL3VML.#80.NZL.OC
To : APRDIG@WW
Subject: Re: Antenna Question (Slightly off topic)
From: Jeff King <jeff@aerodata.net>
Date: Fri, 30 Apr 2004 02:04:44 -0400
X-Message-Number: 9
Back in the PBBS days I did exactly what you are trying to do (based on a
design recommendation from w3iwi). I built a quadrature hybrid that allow
me to feed two radios into one amp that drove one antenna. See:
http://www.microwaves101.com/encyclopedia/Quadrature_couplers.cfm#branchline
The antenna is hooked up opposite the resistor on the load port (50 ohm)
designated Port 2 on the first drawing. The radios are hooked to port 1 and
port 3 respectively.
At one point there where a number of drawings on the internet on how to
make one of these for two meters, but I can't find them.
Do note you will loose 3db with this divider, but if properly designed the
ports will be isolated. Also, the 50 ohm load resistor has to be rated at
half your power.
--
Jeff King, jeff@aerodata.net on 04/30/2004
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Subject: Re: digipeater naming conventions
From: "Chris Rose" <kb8uih@sbcglobal.net>
Date: Fri, 30 Apr 2004 06:42:14 -0400
X-Message-Number: 10
Having to ID beacon @10 minutes would add to channel loading, wouldn't it?
Why add more traffic just because you are naming or labeling your digis
other than with the op's callsign? My beacon is @30 minutes. Now on top of
extra packets, someone needs to download some charts to identify what fancy
number scheme or alpha tag list to see what combination represents what digi
somewhere else in the country? I can look up a call sign on qrz.com or use
findu.com to find out roughly where a digi is by its call sign. Why do I
need to look up a fips code from the NWS to see where a packet comes from?
Thanks,
Chris
KB8UIH
>Subject: [aprssig] digipeater naming conventions
>
>>How feasible is it for us to name our digipeaters by our FIPS code? Yes,
>that
>>would limit us to one main digipeater per county, and FIPS is a US-centric
>>numbering system.
>
>Doesn't dale use the fips codes for Wxsvr. I suggest using CLLI codes that
>better describe a location.
>
>Parker, AZ, for example is PRKRAZ . Colorado Springs,CO is CLSPCO as
>another example.
>
>CLLI codes are standard in the telecommunications industry and are standard
>for FireNet servers.
>
>Jim, WA6OFT
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Subject: RE: APRS alternate BBS and Bulk channel
From: "AE5PL Lists" <HamLists@ametx.com>
Date: Fri, 30 Apr 2004 06:07:51 -0500
X-Message-Number: 11
How about gating any UI packet? If the object is to keep the bulk data
off of the APRS channel, this would accomplish that and not require any
special software, just a two port TNC set up to only gate UI packets.
Where this method runs into trouble is when the APRS channel is
overloaded to begin with.
Just a thought. As you point out, a standard IGate software modified to
do RF - RF with the FMBBS tag would work as well. In other words,
instead of RF <-> APRS-IS, the gate would be set up for BBS Freq. <->
RF. Note that the local APRS RF frequency becomes the "backbone"
frequency for UI packets. Again, none of the connected packets will
make it through.
73,
Pete Loveall AE5PL
pete@ae5pl.net
>-----Original Message-----
>From: Robert Bruninga
>Posted At: Thursday, April 29, 2004 10:24 PM
>Subject: [aprssig] APRS alternate BBS and Bulk channel
>
>1) Any APRS packet it heard on the BBS channel it
> would GATE over to the APRS channel and insert
> "FMBBS" in the digi path so that APRS people
> would know that that person was over on the BBS
> Freq.
>
>2) Any APRS message packets heard on the APRS
> channel it would pass over to the BBS channel
> (for any station that it heard there.. just like IGates do).
----------------------------------------------------------------------
Subject: Re: digipeater naming conventions
From: David VanHorn <dvanhorn@cedar.net>
Date: Fri, 30 Apr 2004 06:13:25 -0500
X-Message-Number: 12
At 06:42 AM 4/30/2004 -0400, Chris Rose wrote:
>Having to ID beacon @10 minutes would add to channel loading, wouldn't it?
>Why add more traffic just because you are naming or labeling your digis
>other than with the op's callsign? My beacon is @30 minutes. Now on top of
>extra packets, someone needs to download some charts to identify what fancy
>number scheme or alpha tag list to see what combination represents what digi
>somewhere else in the country? I can look up a call sign on qrz.com or use
>findu.com to find out roughly where a digi is by its call sign. Why do I
>need to look up a fips code from the NWS to see where a packet comes from?
Don't digis send their location?
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Subject: Re: d700
From: Bob Gould <bobg575@yahoo.com>
Date: Fri, 30 Apr 2004 04:57:16 -0700 (PDT)
X-Message-Number: 13
To all interested in the D700,
I have placed an order with HRO for one of these after I emailed about 8
different vendors. I got the same answer from them all. They were all
either very low on stock or out of stock. I have received a confirmation
that Kenwood is shipping stock this week and most distributors should have
stock late this week or early next week.
Can't wait to get mine.
Bob
N1WJO
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Subject: Re: digipeater naming conventions
From: "Robert Bruninga" <bruninga@usna.edu>
Date: Fri, 30 Apr 2004 08:14:08 -0400
X-Message-Number: 14
>>>"Dick C. Reichenbach" <dreichen@columbus.rr.com> 4/27/04 10:22:07 PM
>>>
>Why not use the Maidenhead location for the name?
Wow, I like that one...
Bob, WB4APR
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Subject: Re: digipeater naming conventions
From: wes@johnston.net
Date: Fri, 30 Apr 2004 08:36:08 -0400 (EDT)
X-Message-Number: 15
I like that one too!!!
wes
ham callsign: kd4rdb
find me: http://wesvan.zapto.org
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Subject: Re: digipeater naming conventions
From: "Robert Bruninga" <bruninga@usna.edu>
Date: Fri, 30 Apr 2004 08:38:13 -0400
X-Message-Number: 16
>Having [the DIGI] to ID beacon @10 minutes would add
>to channel loading, wouldn't it?.... My beacon is @30 minutes.
Its a mathematical fact that proper loading and use of an APRS channel is
about 50 to 100 stations/digis/users/WX per local area. "Local" being
defined as that area incompasing about 50 to 100 users no matter what the
geographical area.
In such a LAN (as I call it) there are probably one to maybe 4 digis. If
each digi sends its posit once every 10 minutes DIRECT (as they should),
this is only 0.002 to 0.006 of channel capacity. This is well worth it for
the most important asset in the entire LAN. Yes, digi posits that go
beyond DIRECT should be low like 30 minutes. But every digis SHOULD send
out a local packet once evey 10 minutes.
This makes sure that anyone driving through the area, or just turning on
their rig, or just responding to a emergency or for whatever purpose is
never more than on average about 5 minutes from being aware of all APRS
asssets within his IMMEDIATE area.
Please, APRS is not a 24/7 system. It is a real time system always ready
to instantly respond to the communications needs of LOCAL users.
de WB4APR, Bob
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Subject: RE: APRS alternate BBS and Bulk channel
From: "Robert Bruninga" <bruninga@usna.edu>
Date: Fri, 30 Apr 2004 08:39:49 -0400
X-Message-Number: 17
Yes, good ideas... Id like to see the parallel bulk channel
develop. I see lots of ways to use it... Bob
----------------------------------------------------------------------
Subject: Re: d700
From: "John R. Ackermann N8UR" <jra@febo.com>
Date: Fri, 30 Apr 2004 08:41:00 -0400
X-Message-Number: 18
I just bought one, and Universal Radio, R&L, and HRO all showed back
order, but Amateur Electronic Supply "had plenty of them." No one
mentioned discontinuation, though.
John
----------------------------------------------------------------------
Subject: Re: d700
From: "Robert Bruninga" <bruninga@usna.edu>
Date: Fri, 30 Apr 2004 08:41:27 -0400
X-Message-Number: 19
A student here just got his D700 yesterday... and didnt mention any
problems.... Bob
----------------------------------------------------------------------
Subject: Re: ping
From: "John R. Ackermann N8UR" <jra@febo.com>
Date: Fri, 30 Apr 2004 08:47:09 -0400
X-Message-Number: 20
Wes Johnston wrote:
>ping
The listserve software wedged yesterday, but it's been reset now and
messages seem to be flowing.
73,
John
----------------------------------------------------------------------
Subject: Lyris glitch
From: wes@johnston.net
Date: Fri, 30 Apr 2004 08:47:20 -0400 (EDT)
X-Message-Number: 21
The server archives seem to not be working (still), and for some reason I
did not get any mail from aprs sig for the last two days until last night
when I sent a 'ping' message. Now they are streaming in.
Since I started a topic two days ago about repeater naming conventions, I
didn't get any of the messages anyone may have responded to unless they
copied me. Did I miss anything? I see Bob Bruninga quoted a message which
I didn't get, so I know I at least missed a few.
Wes
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