[aprssig] APRS and RF data modules

Jason Winningham jdw at eng.uah.edu
Thu Apr 28 07:03:17 CDT 2005

On Apr 28, 2005, at 4:02 AM, Andrew Rich wrote:

> Has anyone dabbled with APRS and these little data modules ?

I tried something similar (TX-FM AUDIO from Abacom 
http://www.abacom-tech.com/) for an APRS transmitter with a D7 on the 
receive end.  I chose this transmitter because it had audio inputs and 
a matching amplifier to get the power up to (IIRC) about 0.5W.

The SAW stabilized oscillator wasn't very stable.  The frequency 
drifted all over the place, and I didn't get too much data from it.  No 
good for APRS.

If you use them in a TX/RX pair as intended, I have no idea how they'll 
actually work.  I'd be interested to find out.


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