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ZL3AI > APRDIG 22.05.04 23:09l 238 Lines 8628 Bytes #999 (0) @ WW
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Subj: TAPR Digest, May 15, 3/3
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From: ZL3AI@ZL3VML.#80.NZL.OC
To : APRDIG@WW
Subject: RE: Conversation with Kenwood at Dayton
From: Jeff King <jeff@aerodata.net>
Date: Sat, 15 May 2004 17:08:21 -0400
X-Message-Number: 9
On Sat, 15 May 2004 13:38:16 -0400, Jeff King wrote:
>Opening up the Kenwoods firmware to ham development would
>considerably shorten that tooth and extend the products lifetime. We
>still have TNC2's and clones, going on 20 YEARS OLD, being used in
>state of the art APRS digi's using the firmware UI-VIEW.
Opps... brain malfunction, I meant UIDIGI ;-(
http://xoomer.virgilio.it/msavegna/uidigi-e.htm
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Subject: RE: Conversation with Kenwood at Dayton
From: Earl Needham <needhame1@plateautel.net>
Date: Sat, 15 May 2004 15:51:15 -0700
X-Message-Number: 10
On Sat, 15 May 2004 07:43:29 -0400, Mike Yetsko wrote:
<snip>
>If you make your product serial, ANYONE can get to it.
>
>If you make your product USB, ONLY the people with USB can get to
>it.
Interestingly, this is about to be BACKWARDS. It's getting to the
point that it's difficult to find computers with serial ports, but USB is
almost everywhere.
Earl
Earl Needham, KD5XB, Clovis, New Mexico DM84jk
SETI@Home: 11537WU/7.48yrs
<A HREF="http://www.railpictures.net/showphotos.php?userid=3723">Click
Here</A> to view my photos at RailPictures.Net!
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Subject: RE: Conversation with Kenwood at Dayton
From: "Mike Yetsko" <myetsko@insydesw.com>
Date: Sat, 15 May 2004 18:44:13 -0400
X-Message-Number: 11
>On Sat, 15 May 2004 07:43:29 -0400, Mike Yetsko wrote:
>
><snip>
>>If you make your product serial, ANYONE can get to it.
>>
>>If you make your product USB, ONLY the people with USB can get to
>>it.
>
>Interestingly, this is about to be BACKWARDS. It's getting to the
>point that it's difficult to find computers with serial ports, but USB is
>almost everywhere.
>
>Earl
That's true.
But the point I was trying to make is if you have a computer with ONLY USB,
you can get to a SERIAL device with a USB to serial adapter cable.
If you have a computer with only a serial device, you CANNOT easily get to
a USB device. They just don't make common inexpensive serial to USB
adapters. You'd have to take the device and get an adapter to go from that
devices USB (in slave mode) to serial, and just to find one.
The problem is that a lot of people think of USB as some kind of super
serial port that can be converted back and forth to serial easily. It
isn't. USB interfaces are generally PCI interfaces that have NO interrupt
capability on the USB side. It's all done through the PCI interface, and
at pretty incredible speeds compared to serial. There just ain't no
practical way to put USB on a serial computer port, unless you hang a
dedicated controller out there to do it, and then where's your 'standard
interface'?
Yes, take every computer you can find to JUST USB!! It's great, it's fast,
it's simple, and even when converting to serial it STILL allows every
single port you hook up (if done properly) to work, within reason, at the
same time. But the benefit there is you can STILL do serial!
You loose that if you start specifying USB only devices.
Mike
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Subject: Re: New into APRS - what to use?
From: Curt Mills <archer@eskimo.com>
Date: Sat, 15 May 2004 15:05:07 -0700 (PDT)
X-Message-Number: 12
On Sat, 15 May 2004 blairhogg@comcast.net wrote:
>Right now I am just looking for the equipment needed in the mobile
>station to report location, not necessarily to use the APRS as
>part of the fox hunt, e.g. the GPS, TNC and TX. I'd like it to be
>semi-permanent, that I canm just leave it in the car, and the
>portable unit has to be manually energized every time you want to
>use it.
>
>I am currently considering a single board system, like the
>Motorola Oncore, coupled to the TT3. Just wondering if anyone else
>has used one of these.
The TT3 would be a good choice. So would a KPC-3+ or a TigerTrak unit.
Some people are using the Oncore's. I've used Trimble SV6 boards which can
be acquired cheaply. There are also Rand McNally GPS'es that were intended
for Palm PDA's which people have hacked, people have hacked into their
OnStar systems, there were RS GPS'es on closeout some months back, lots of
options.
Nice thing about the TT3 is that you can feed it inverted TTL levels and
just check the box to invert the data in the config program. Works well for
the Trimbles, so you don't have to add hardware to do it.
>For the DF work we generally use the basic stuff - directional
>antenna and compass, map to record bearings (I use the laptop and
>amapping program). The APRS is for amusment only - so that the
>fox can see where the hunters are.
You can also use some of the APRS programs to manually plot bearings, yet
not transmit that info to the other hunters. Xastir can do that.
>Is the pockettracker a problem since it doesn't receive, and can
>transmit on a busy channel?
That's the flame-bait part... Opinions vary. It's been discussed lately
on the SIG, in detail.
>I guess it depends upon the location and prevalence of
>digipeaters. I expect in the near future to blow the dust off the
>old TNC, see if it still works, and throw up a digipeater here at
>the house (if that old TNC will even support this new stuff).
>Might even look into connecting it to the internet. That's another
>issue.
Most old TNC's will support APRS just fine, assuming you want to put up a
RELAY-only digi, or an APRS station that is connected to a computer. You
can also hook up an old DOS laptop and run Digi-Ned to turn it into a
WIDEn-N digi. There's a linux version of Digi-Ned as well.
--
Curt, WE7U. archer at eskimo dot 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: laptop
From: David VanHorn <dvanhorn@cedar.net>
Date: Sat, 15 May 2004 20:47:44 -0500
X-Message-Number: 13
At 12:46 PM 5/14/2004 -0700, Scott Miller wrote:
>Yes, I understand... that's exactly why I've included serial ports in my
>design. There are few interfaces as hacker-friendly as RS-232.
>
>Still, for host connections, USB is going to be a requirement for many new
>systems. Might as well do it right.
In my printer design, I did both.
The main interface is serial TTL, which is buffered by either an RS-232
card, or a USB card.
The USB card is powered from the bus, the 232 from the system.
This also allows for the "I didn't think of it before" interface.
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Subject: RE: Conversation with Kenwood at Dayton
From: "Chuck Gooden" <cgooden@insightbb.com>
Date: Sat, 15 May 2004 20:53:44 -0500
X-Message-Number: 14
Although USB is good for somethings, I think I would rather see TNC's, and
radios have ethernet connections than USB. They also could run a small web
server to allow you to configure them like the Linksys routers do.
Then I could control my radio at my house from my desk at the office and
would not miss any of the afternoon dx.
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Subject: Re: New into APRS - what to use?
From: Jeff King <jeff@aerodata.net>
Date: Sat, 15 May 2004 21:43:02 -0500 (CDT)
X-Message-Number: 15
Quoting Curt Mills <archer@eskimo.com>:
>On Fri, 14 May 2004 blairhogg@comcast.net wrote:
>>Is it better to use an HT or mobile rig? Or
>>just not worry about the frequency busy status?
>That's almost flame-bait... ;-) We'll see what kind of responses
>you get on that one.
Oh, you mean the "arm chair attorney" thread? Mostly opinions trying to
justifying poor operating practices. Back in the dark ages of packet radio,
we used to call that POOP (Poor Operating On Packet). TAPR even had some
neat stickers one year at Dayton:
http://www.asahi-net.or.jp/~sx7h-iwmt/jh4xsy/images/goods/POOP.jpg
I think what is being described above would have been called "Snake POOP"
http://home.nc.rr.com/ac4zo/articles/poop.html
Anyways, back to the present day, the FCC recently had a somewhat relevent
opinion here on the matter
http://www.arrl.org/news/stories/2004/03/03/100/
but of course, what does the FCC know when one has the extensive legal
expertise of the APRSSIG to depend on? ;-)
---
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