On Sun, 2011-08-14 at 20:34 -0400, Joseph Apuzzo wrote:
> or is it a Ed Special?

I wanted to combine mic audio with the APRS bursts, so I conjured up a
no-doubt excessively complex interface that worked with our ICOM HTs:

http://softsolder.com/2010/06/17/gps-audio-interface-for-icom-z-1a-ht/

Alas, that does *not* work with the Wouxun (which uses the Kenwood HT
interface), so I chopped up & rewired a circuit board to behave that
way. The ICOM battery pack / power adapter, of course, doesn't fit the
Wouxun, so I must build another one; the 3D printer will help a lot.

Right now the whole mess is bungied to the side of the radio pack.

The trouble with doing audio + data is that either you're chatting on
the APRS frequency *or* you're hosing down a voice frequency with APRS
data. The local APRS gurus OKed our low-volume / low-power tactical
comm, but talking more than that would be a Bad Thing for data
throughput.

You do *not* want to send data bursts through the repeaters.

If you just want to send APRS data squirts on the APRS frequency, then
you just wire the APRS board (Byonics TT3, etc) more or less directly to
the HT's mic & PTT inputs. It has enough options & settings to work with
nearly anything.

The Galactic APRS database available through aprs.fi does all the
logging & tracking & stalking I need for my simple purposes. Their
by-date interface is, mmm, awkward, but that's in the nature of fine
tuning.

Good clean fun...

-- 
Ed
http://softsolder.com


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