"Jeff Liebermann" wrote in message
...

On Mon, 23 Jul 2012 09:43:10 -0700, "Wayne"
wrote:

Military ELMR equipment is authorized for 380-399.9 MHz.
Garage door openers that operate low power unauthorized in the same band
are
sometimes messed up.

Wonder if the military or the garage door opener company will win...

http://www.theday.com/article/201207...307239975/1018

snip

#Drivel: One of my customers was having problems with their garage
#door opener. They said they could easily close the door from the end
#of the driveway, but could not open it again from the same location.
#When I arrived, I found that they had an aluminum garage door, with
#the receiver mounted behind the door. Between the metal door and
#aluminium foil backed insulation in the walls and roof, the garage
#made an effective screen room. I moved the recevier and wire antenna
#to a better location, which fixed the problem.


snip--
#Jeff Liebermann
#150 Felker St #D http://www.LearnByDestroying.com
#Santa Cruz CA 95060 http://802.11junk.com
#Skype: JeffLiebermann AE6KS 831-336-2558

My own situation was that the remotes in the cars lost range. You could
open the door if the car was practically touching the door, but not much
farther back.

Using various test gear, I found an interfering signal that was just a few
feet away. The remote opener screwed on the outer wall had failed in the
"on" position and was closer to the receiving antenna than the openers in
the cars.

The Genie engineers were quite interested in getting that failed remote in
their hands to examine the problem. They were amazed that I located the
problem, but it's all in the test gear.

Wayne
W5GIE (exiled to W6)