Re: noise?

["Robert Green" <ROBERT_GREEN1963@xxxxxxxxx>]

[Re: searching for stuck RF transmitter]

I had luck using an AM radio to track down a PalmPad with a stuck button.
IIRC, tuning around 8 or 12 on the AM band gives you a very
distinct-sounding pulsing noise that gets a *lot* louder as you get closer
to the offending transmitter.  Again, working from memory, the sound takes
on a unique rapid three-pulse beep when you get very close.

If you've got a portable AM set, take it far away from the house, use a
PalmPad with the button held down with a big spring clip so it's always
transmitting and then tune it to an X10 frequency harmonic.  Experiment with
a controlled "emitter" in an open field and you'll get a good idea what to
listen for.  Then come back to the house for a "walkabout."

I was going to try mounting the AM radio inside a metal parabolic lamp
reflector but came across the unit before that became necessary.  You can
probably map out the location by approaching the house from different
compass points and noting where you first begin to hear the pulses.  In my
case, the search was easy because I could narrow it down to a few areas
where Palmpads are usually found.  With a five-year-old about, I don't think
there's any area you can safely exclude!

--
Bobby G.


"Lee" <lou7.5@xxxxxxxxxxxxxx> wrote in message
news:HHGRe.3302$4P5.3162@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
> Weeks!  AAAAAAAAAAAAAAAAGHHHHHHH.
>
> So I guess i will look in to building a yagi.
> Or offer the five year old ten buck and a gallon of ice cream to find it.
>
> Lee
>
>
>
> "Dave Houston" <nobody@xxxxxxxxxxxx> wrote in message
> news:431831e8.18265323@xxxxxxxxxxxxxxxx
> >I doubt the batteries will last more than 2-3 years. ;)
> >
> > Some of my palmpads get fairly heavy use and the batteries have lasted
> > several years now. I'm sure that under continuous operation they'll die
> > sooner but they may still last for weeks.
> >
> > "Lee" <lou7.5@xxxxxxxxxxxxxx> wrote:
> >
> >>Thanks for the input.
> >>I have searched the whole house many times, can't find it.
> >>But any lost item is always in the last place you look.:(
> >>
> >>So how long can the batteries last?
> >>
> >>Lee
> >>
> >>
> >>"Dave Houston" <nobody@xxxxxxxxxxxx> wrote in message
> >>news:4317f7b6.3364576@xxxxxxxxxxxxxxxx
> >>> Since the MR26A is powered from the RS232 port there are no safety
> >>> issues.
> >>> You can replace the antenna with a highly directional Yagi but I'm not
> >>> sure
> >>> it would be worth the effort, especially if the culprit turns out to
be
> >>> nearby.
> >>>
> >>> You would have to build the Yagi yourself - I don't think you'll find
an
> >>> off-the-shelf Yagi cut for 310MHz.
> >>>
> >>> "Lee" <lou7.5@xxxxxxxxxxxxxx> wrote:
> >>>
> >>>>I'm getting the RF signal through a MR26 and all of several TM751s
that
> >>>>I
> >>>>tried.(seperatly)
> >>>>
> >>>>Was also thinking, is there a way to make a TM751 antena directional?
> >>>>
> >>>>Lee
> >>>>
> >>>>"Dave Houston" <nobody@xxxxxxxxxxxx> wrote in message
> >>>>news:43166462.216660914@xxxxxxxxxxxxxxxx
> >>>>> If there was no mains power, it is not coming from the mains so you
> >>>>> can
> >>>>> eliminate the neighbors as well as everything except the things
> >>>>> plugged
> >>>>> into
> >>>>> the UPS. What interface are you using?
> >>>>>
> >>>>> "Lee" <lou7.5@xxxxxxxxxxxxxx> wrote:
> >>>>>
> >>>>>>Hi all,
> >>>>>>
> >>>>>>      I've got something transmitting an E1on constantly. Tried
> >>>>>> unplugging
> >>>>>>everything,still there. Took the batteries out of every thing I
could
> >>>>>>find,
> >>>>>>still there. Put Home seer on a UPS, turned house main power off,
> >>>>>>still
> >>>>>>there. So I must have a lost  and jammed palm pad or a neighbor with
> >>>>>>some
> >>>>>>problem.
> >>>>>>
> >>>>>>So how do I find the source?
> >>>>>>
> >>>>>>Lee
> >>>>>>
> >>>>>>
> >>>>>>
> >>>>>
> >>>>
> >>>
> >>
> >
>
>