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[aprssig] Automatic omni DF query

Dave Baxter Dave at emv.co.uk
Tue Feb 10 14:56:44 UTC 2009


Doppler DF works fine on AM signals, but you need a FM reciever, I guess
that's what you meant.

Dave G0WBX.
 

> -----Original Message-----
> From: Chuck Gooden [mailto:Chuck.Gooden at comcast.net] 
> Sent: 10 February 2009 11:46
> To: TAPR APRS Mailing List
> Subject: Re: [aprssig] Automatic omni DF query
> 
> If I am not mistaken, AM is used on 121.5 and Doppler systems 
> will not be effective on AM signals.
> 
> Rick Green wrote:
> > On Mon, 9 Feb 2009, Scott Miller wrote:
> >
> >   
> >> Before anyone asks, these particular units won't work for 121.5 - 
> >> I've only been able to get them to receive as low as 127 MHz.
> >>     
> >    That's a moot point anyway - I just read on another site 
> that the 
> > government has announced the discontinuance of satellite 
> monitoring of
> > 121.5 and 223.0, obsoleting a huge 'fleet' of ELTs., so all the 
> > boaters, aviators, and hikers will be forced to upgrade to 
> the new standard.
> >
> >   
> 
> 
> 



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