PL 100 for Mobiles and Portables ONLY!

VOICE ALERT! The concept called Voice Alert is like getting a FREE APRS voice calling channel in your mobile 

for ALWAYS being able to contact an APRS mobile no matter what freq his voice radio is on. Its also like a radar

detector for other mobile APRS operators in simplex range on the open road. It is trivially simple:



Instead of turning the speaker volume down on your noisy 144.39 channel, simply set CTCSS decode to 100 Hz.

This accomplishes 2 things:

1) It keeps your speaker quiet but everyone who understands voice alert knows they can contact you by voice 

 by simply calling on PL 100.



2) It causes your outgoing packets to have PL 100 to serve as a radar ping to other Voice Alert stations in range.

 Conversely, you will never hear anything on your 144.39 voice alert unless another APRS voice alert station is 

 in simplex range (about 5 miles max)



These two make sure you will have an opportunity for a voice call to QSY to 52 or other channel for a QSO. 

On the interstates you pass another ham statistically about once every 10 minutes. But you never know it. 

With Voice Alert, you now will be aware of each other's presence AND you will have a KNOWN contact frequency.

Mobiles and Portables only! NO BASE STATIONS or DIGIPEATERS please.