[ale] OT: home broadcasting

[zeb morgan]

You might look at "carrier current" broadcasting.  One uses a small 
transmitter that broadcasts a signal on the a.m. band.  The "antenna" 
is the ordinary a.c wiring.   My college radio station used such a 
device to cover a small town.  Allowed broadcast signal strength is 
related to broadcast wavelength, so lower frequencies (longer 
wavelengths) are preferred.  Frequency response would be limited, but 
a.m. radio is probably good enough for "background" music, and a 
cheap  reeiver would probably do.  Radio Shack used to sell a carrier 
current tranmitter, and I have one from thirty years ago.

On Wednesday 10 December 2003 03:39 pm, Brian MacLeod wrote:
> Yes, the FCC is restrictive on power level and antenna
> length.  The big thing is to remain under a 300ft
> broadcast range.  That's allowed under FCC regulations
> for the full FM band.
>
> I know there are designs out there for a box with that
> kind of power, and can be tuned to any frequency in
> the FM bands, but I have no idea where it is, and I
> only have the paper copy if I have it.
>
>
>
> --- Bjorn Dittmer-Roche <dittmeb at mail.rockefeller.edu>
>
> wrote:
> > I suspect you will have a very hard time: The FCC
> > regulates FM and AM
> > transmitters to very restrictive power levels. There
> > may be one or two
> > frequencies that are not so regulated, but I am
> > pretty sure that's not the
> > case. I would say with 20' you are doing well.
> >
> > I recommend looking into systems that are in the
> > less regulated 900MHz
> > band. They make wireless speakers, headphones and
> > transmitters that work
> > in this range (the trick is to find ones that are
> > mutually compatible...).
> > My 900MHz speakers pick up a lot of interference,
> > but it depends on where
> > you live. (Jake's Ice cream in Decatur has a bunch
> > of wireless speakers
> > setup in their various room if you want to check
> > that out.).
> >
> > 	bjorn
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