Sounds like you need to perform your own NEPA study.... You'll see how the govt. looks at human absorption at 2.4Ghz vs. 144 Mhz... You may think twice about your 2 meter HT and love the WiFi....

-Joe
KA3NAM


http://www.damtravel.com



Brad Douglas wrote:
On Fri, 2008-04-25 at 12:55 -0400, Rick Green wrote:
On Fri, 25 Apr 2008, Brad Douglas wrote:

- Still requires USB to TNC/radio for APRS, making arm placement fairly
useless as USB is not a locking connector
It supports bluetooth and Wifi. remote serial support is available for both, so you don't have to tangle your body with wires. The zypad can communicate with the TNC/radio clipped to your bat-utility belt without them.

Good point.  I didn't entirely think that through.  Bluetooth would be
ideal, but I still don't like the idea of a WiFi transmitter attached to
me (however, they don't specify power output).

FYI -
>From what I can tell, it looks like they are using a UBlox[1] GPS
chipset and a Sarantel[2] Helical antenna.  The GPS chipset is an
absolutely outstanding performer, supports multiple GPS constellations,
and is *very* expensive (~$100USD for a single chip).  The antenna is
designed to have maximum gain at altitude, not on the ground.  I use
them in a couple of projects.

I hope this is useful info, Craig.

[1] http://www.u-blox.com/products/tim_4r.html
[2] http://www.sarantel.com/products/geohelix-p2


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