Why not use subaudible tones? Much easier to work with and filter out.

73
Gary K4FMX


On Sun, 29 Feb 2004 13:20:29 +0100, "Gery Duyck"
wrote:

It isn't the purpose to transmit these tones!

What I want to do:
Talk over my portable tranceiver all around the house on a couple of
miliwatts.

When I press the PTT button of an extended home brewed microphone
the tone comes up the computer in my shack will set the big tranceiver
active and:
- filter out the tones
- retransmit my signal with the tranceiver

When I release the PTT another tone will be transmitted so the computer
knows to
switch of the tranceiver.

The same way nasa used this I wanna use it to, to remote controll the PTT.
So I can work over a bigger range with less battery power.

The major reason why I want to work with tones is that if outher people are
working
on "my" frequency my rig wil transmit. with the tone it only transmit when I
wan it.

I want to write a computer program that can accept DTMF tones and the "roger
beep" tones.
So I can choose the repeater or freqency I want to operate remotly.

73'
ON4GDK, Gery

"Gregg" schreef in bericht
news:N8b0c.32891$A12.4287@edtnps84...
I dunno about the HAM crowd, but on CB, we throttled people who had those,
other than for skip QSO.

--
Gregg
*It's probably useful, even if it can't be SPICE'd*
http://geek.scorpiorising.ca