RadioBanter - View Single Post

November 3rd 05, 05:09 PM

wrote:
Hi

I'm curently working on a project for college, I am thinking of
building a portable shortwave transmitter that can send me gps
cordanates to show me where it is. I face certain problems as im not
sure what frequncy to use e.g groundwave or skywave. Aswell would it be
possible to send data over a HF i heard that there is much interferance
from it, is this possible? and how much power would you reckon i would
need to transmit a fair distance say no more than 100 miles(considering
this device has to be portable).
thanks in advance.

paulos
+++++++++++++++++++
Why reinvent the wheel?
Hams have used AX25 and GPS, APRS, for years.
There are many possible uses.
For a start check out: http://au.geocities.com/vk3hjq/vk3hjq/aprs.htm

The 100 miles will be difficult to do dierectly.
But easy with the use of a "repeater".

Terry