"Michael A. Terrell" wrote in message
...
Michael Kennedy wrote:

"clifto" wrote in message
...
Michael Kennedy wrote:
"Sjouke Burry" wrote in message
...
In case of interference, you just have to get closer to your
receiver,
for it to work.

Or get a signal amplifier, although I'm sure that is not legal.

That's it, a garage door opener transmitter with a 500-watt linear
amplifier.


My thoughts exactly. I could open my garage door from anywhere in
the
state.


Have you ever looked at the circuitry in a garage door opener
receiver? No pre-amp, not much more than a tuned circuit feeding the
mixer. Some older units were TRF broadband, and used simple tone
modulation.


--
My sig file can beat up your sig file!

No, I've never taken one apaprt. I didn't realize that they were so simple,
but then again I don't have a garage door opener, or a garage door for that
matter.

Mike