On Sat, 11 Oct 2003 09:05:40 -0700, Evan Platt
wrote:

On 11 Oct 2003 00:30:49 -0700, (Mark Keith) wrote:

Is this about the same as the "sel-call" used in aviation? If so, no.
I know of no ham rigs that include that. But airnav sells a sel-cal
decoder for computer.
You can get a working demo on the web at their site.
I don't know if this would work for your needs though. The aviation
sel-cal uses a 4 letter code, IE: EKBN or whatever...But on the radio
you hear two tones of different pitches. IE: beeeeeep, boooooop, or
whatever. I *think* the two tones heard are mixtures of two tones
themselves, hence the 4 letter code, but not sure. Seems like I've
heard fire station calls that had about the same type of sound, now
that I think about it. But don't know if compatable or not. I guess
you could try the free sel call demo and see if it will work. MK

I don't know if it's Select Call - I think that's another tone.

You can hear the tone at
http://www.firescan.net/cgi-bin/chin...i?by=page&ch=2 - click on
any link.

I'd prefer it in a handheld...

Thanks.

Evan
To reply, remove TheObvious from my e-mail address.

I know of no amateur transceivers that do two-tone select calling.
Icom's IC-F30GS does, it will also operate within the 2 meter amateur
radio bands. Other commerical transceivers do two tone select calling
too.

What I don't remember is if you can scan with the 2 tone select
calling enmabled. If you docan there is a possibility of missing a
call as you are scanning channels other than the primariy 2 tone
select call channel.


Gary K8IZ
Washington State Resident
Registered Linux User # 312991