Here's my cracked idea for the day. I'm hoping someone here can lend a
clue.

I'd like to set up an array of audio transmitters that cover my
property, which I can use to monitor the activity of certain vermin.
They dig, and it makes noise. It just occurred to me that I might use
an off-the-shelf scanner to monitor all of the transmitters. Is there
any radio band where I could legally broadcast across, say, two dozen
frequencies? And are there off-the-shelf scanners that would scan it?

On 8 May 2006 21:49:07 -0700, wrote:

Here's my cracked idea for the day. I'm hoping someone here can lend a
clue.

I'd like to set up an array of audio transmitters that cover my
property, which I can use to monitor the activity of certain vermin.
They dig, and it makes noise. It just occurred to me that I might use
an off-the-shelf scanner to monitor all of the transmitters. Is there
any radio band where I could legally broadcast across, say, two dozen
frequencies? And are there off-the-shelf scanners that would scan it?

FM Broadcast band (even AM broadcast band), ISM, almost any frequency
if the power is low enough to be considered incident radiation.

The scanner would depend on the frequency, but something like a Uniden
330 covers just about everything.

For AM and FM broadcast bands wouldn't I need to find clear stations?
I've cataloged open FM stations before, and there isn't much. If I use
one that isn't clear, wouldn't my signal be swamped? Or, if not,
wouldn't I start to interfere with reception on neighboring properties?

On 9 May 2006 11:08:28 -0700, wrote:

For AM and FM broadcast bands wouldn't I need to find clear stations?
I've cataloged open FM stations before, and there isn't much.

How many channels do you need? There should be one clear channel
between each pair of stations in your area.

do it wherever you like as long as its under 100mW power.
49meg would be my fav to use,
you can get these silly bike headsets in the £ shops now
they would work a treat, up to say 20ft

mike

wrote in message
oups.com...
Here's my cracked idea for the day. I'm hoping someone here can lend a
clue.

I'd like to set up an array of audio transmitters that cover my
property, which I can use to monitor the activity of certain vermin.
They dig, and it makes noise. It just occurred to me that I might use
an off-the-shelf scanner to monitor all of the transmitters. Is there
any radio band where I could legally broadcast across, say, two dozen
frequencies? And are there off-the-shelf scanners that would scan it?