"The Daring Dufas" wrote in message
...
On 8/29/2011 9:06 AM, Robert Green wrote:
Howdy all,

Slowly but surely, my X-10 RF reception is being knocked out by endless
streams of these commands broadcast on different days at different
times.

M2 OFFs
C2 OFFs
Gxx DIMs

At first, when only C2 OFFs appeared, I searched in vain for a stuck
transmitter button or some other internal cause. I could find none.
The
problem occurred with TM751's, the WGL all-house code unit and with
RR501's,
too. Setting the WGL to ignore those three housecodes was all but
useless -
the constant strong signal overwhelmed any X-10 transmitter not within a
foot or less of the transceiver. This interference started out slowly
over
time, and now forces me to shutdown the RF section of my X-10 system
almost
daily.

I'm in the Washington, DC area. Has anyone else seen anything similar?
Any
ideas where to look for the transmission source. Could the RF signal
"ride"
the powerlines that an X-10 transmitter could receive? Even putting the
receiver in a metal coffee can doesn't seem to point to a potential
source
of the signal. It seems to be very uniformly distributed throughout the
house. If I can't get it to stop, I'll have to hardwire a lot of things
I'd
rather not. )-:

TIA for any help.

--
Bobby G.



Back in the late 1980's I was working and living in the country of
Californiastan when the community I was in at the time started having
problems with their electric garage doors opening and closing as if
possessed by some evil door opener. It turned out that the US Navy
was testing the big search radars on some ships in the bay. Those big
powerful radars were producing an RF harmonic signal that was just right
to screw with the RF remote controls for a lot of openers. :-)

TDD

There's a lot of likely sources for this. Two that seem to be the most
likely are IED jammers because this is the Washington DC and is clearly a
"rich target." The second is something coming in on the powerlines that the
power company uses to read, control or in some other way interact with
meters and remote controls that allow them to shut down your central AC
during a brownout (you get a rebate for letting them install the box).

The signal disappeared completely after 9/11, leading me to believe it's an
anti-IED transmission.

--
Bobby G.