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ZL3AI > APRDIG 14.07.04 11:28l 59 Lines 2125 Bytes #999 (0) @ WW
BID : 3589-ZL3AI
Read: GUEST
Subj: TAPR Digest, Jul 12, 3/3
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Sent: 040714/0910Z @:ZL3VML.#80.NZL.OC #:27847 [Chch-NZ] FBB7.00i $:3589-ZL3AI
From: ZL3AI@ZL3VML.#80.NZL.OC
To : APRDIG@WW
Subject: Re: Super Tiny DIgipeater
From: John Hansen <hansen@fredonia.edu>
Date: Mon, 12 Jul 2004 22:03:30 -0400
X-Message-Number: 44
>On 7/9/04 5:33 PM, "Robert Bruninga" <bruninga@usna.edu> wrote:
>
>>I understand that the TNC-X pic TNC is now working?
Yes, see www.tnc-x.com
>>What woiuld it take to make it a DIIGPEATER (very simple, just respond to
>>WIDE)... If we can make it work, then I may have several small CUBESAT
>>builders that would fly us some more digipeaters in space.
Actually a couple of folks are currently working on a digipeter
"daughterboard" for TNC-X. The idea is you just plug in the daughterboard
to the tnc-x expansion header add a radio, and POOF, it's a stand-alone
digipeter. The folks working on this, however, have in mind what is
probably a significantly more sophisticated digipeter than you envision. I
met with them about a month ago, but I don't know how the development is
going. I think they plan to be at the DCC in the fall.
Currently there are about a half dozen cubesat developers that have
purchased TNC-X's. I believe the one at the University of Hawaii is
scheduled to launch in the Fall. I have, on occasion, done some
customization of the hardware and firmware for cubesat projects. If there
are some mods in particular you need to have made for cubesats, feel free
to contact me.
>>Also we still need a TINY 1 W 2m transmitter. Has anyone tried to reverse
>>engineer the old AGRELLO postage stamp APRS transmitter?
You might want to take a look at the schematic for the old Kantronics 2
watt 2 meter transmitter. It was about 5 inches by 2 1/2 inches, I think,
but that was with all thru hole parts (no surface mount), so it could
probably be a lot smaller. I don't know how efficient it was, though.
John W2FS
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Subject: Re: Wanted : PIC code for NMEA bit bashing
From: "Andrew Rich" <vk4tec@hotmail.com>
Date: Tue, 13 Jul 2004 13:09:27 +1000
X-Message-Number: 45
Sorted thanks
Andrew Rich (VK4TEC)
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