[aprssig] WAS:TNC220 ok for UI-DIGI ? TNC's from "Over the Pond"

Rich Garcia k4gps at arrl.net
Sun Mar 13 20:55:43 CST 2005

What would happen if it's a partial kit ?

I come from a heavy background in
firearms and we deal with goverment regulations all the time. There are many
classic guns out there that can not be imported anymore due to a Bush Sr.
passed in 86'. These are fine guns, many which are classic and others that
have significant history behind them. If a law abiding gun owner would want
they need to buy a pre-86' model which would cost 5x+ more than what it
is worth or build one from a kit with "x" number of american parts. For
a H&K G3 goes for $4500 or more today, the same gun that has come in after
86' and
is for sale to law enforcement only is about $600. A handyman special with a
kit is about $399, buy the rest of the parts needed made in the USA and you
a copy for about $800. Looks the same, may or may not be as good and does
not have the value
but you can have one for your collection.

Maybe you can make your TNC a kit needing assembly or offer it without let's
a programmed PIC. The users would need to download the firmware and program
the PIC
but have the programmer as part of the board so it's actually just a matter
DL the file when the product arrives in the mail and updating the board.


-----Original Message-----
From: Scott Miller [mailto:scott at 3xf.com]On Behalf Of scott at opentrac.org
Sent: Sunday, March 13, 2005 9:10 PM
To: k4gps at arrl.net; 'TAPR APRS Mailing List'
Subject: RE: [aprssig] WAS:TNC220 ok for UI-DIGI ? TNC's from "Over the

I'm still working on my TNC project.  I'm curious how many people are still
interested in having the TNC be capable of true connected-mode AX.25, or is
KISS-only sufficient these days?  I've already got the start of a command
shell running, so it'll be configurable via a terminal for things like
digipeating, but as yet there's no converse mode or mailbox facilities.

Is having a mailbox facility even a selling point anymore?  It'll certainly
have space - I've got the prototype running with a 128 MB SD card and it
could easily be larger - but who uses it?

I'm curious what the legal ramifications would be for these TNC imports.  I
think the FCC regs say that if you're going to sell or advertise such a
product (any finished product with digital technology and a clock speed of
more than a few kHz), it's got to be certified.  Is there some way around
this, or does everyone just ignore the issue?

If and when this project is ready, that's going to be a major expense for
me.  Class B certification and CE Marking testing will probably cost more
than all of the tooling and setup fees for manufacturing.  Or does someone
know a cheaper place to get that done?


-----Original Message-----
From: aprssig-bounces at lists.tapr.org
[mailto:aprssig-bounces at lists.tapr.org]On Behalf Of Rich Garcia
Sent: Sunday, March 13, 2005 5:44 PM
To: TAPR APRS Mailing List
Subject: [aprssig] WAS:TNC220 ok for UI-DIGI ? TNC's from "Over the

John, Byron, Scott have all done a fantastic job with "quasi TNC's" these
past couple of years. I read with
some curiousity Andre's message listing some state of the art TNC's that
hams in Europe enjoy. Anyone have
an idea as to why we have not had an opportunity to use these over here? I
think the American TNC market is
failing quickly with the only TNC's currently for sale as new coming from
Kantronics. We may not have large
enough of a market to design and produce TNC's as we once did but I would
think it's large enough to import
something already in production.

What is the exchange rate currently ? Anyone from the other side of the pond
that can tell us what they would cost
in USD ? I am curious as to what it would take to have English versions of
the manuals and maybe someone to import
them. Some links to these products would also be appreciated.


-----Original Message-----
From: aprssig-bounces at lists.tapr.org
[mailto:aprssig-bounces at lists.tapr.org]On Behalf Of Andre PE1RDW
Sent: Friday, March 11, 2005 4:57 PM
To: TAPR APRS Mailing List
Subject: Re: [aprssig] TNC220 ok for UI-DIGI ?

Mark Earle schreef:

> At 05:04 AM 3/12/2005 +1000, you wrote:
> >Whats constitutes a TNC2 Clone ?
> >
> These days, that would be:
> 1. Genuine TAPR TNC-2 (almost impossible to find)
> 2. Pac-Comm Tiny-2 or Mark-2
> 3. MFJ 1270 series.
> We've used the Pac-Comms with good success. I prefer them over MFJ,
> because the MFJ has a "tuneable" modem, and may drift at sites with
> wide temperature variations. The modem chip used in the Pac-Comm is
> crystal referenced.
if you have connections in europe you can go for the symek tnc2 clones
like the tnc2s tnc21s and tnc2h. the first two are 1200 baud and the h
version is 9600
the 1200 baud versions use tcm3105 as the modem, the dcd is not as good
on that ic but it is more stable and copies better in the noice then the
xr2211, there is a mod to use the xr2211 for the dcd and the tmc3105 as
there is also the dutch designed tnc2nl that is sold as a kit, it is
almost identical to the tnc2s.
european tnc2 clones usualy use german designed TF2.7b from nord><link
that has a 27 or 10 channel keyboard mode (depending on the version),
smack-kiss and wa8ded hostmode.
The newer tnc3s, tnc31s and tnc4e use a different faster processor and
canĀ“t run ui-digi but I think the information needed for programming for
these tncs are available, they are designed with flash memory so you can
upload new firware without opening the box.
the tnc3s has place for two modemboards the tnc31s has room for one
modem, the tnc4e  has room for 3 modems and an ethernet port.

73 de Andre PE1RDW

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