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ZL3AI  > APRDIG   14.07.04 10:28l 59 Lines 2125 Bytes #999 (0) @ WW
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Subj: TAPR Digest, Jul 12, 3/3
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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

----------------------------------------------------------------------

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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