This was extremely weird!, page 1
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reply posted on 18-11-2009 @ 10:21 AM by OrphenFire
reply to post by jamiros



No, I know the sound a cellphone signal produces in electronic sound equipment. It definitely wasn't that. Plus there was no cellphone activity anyway, and especially not for 10+ minutes.



reply posted on 18-11-2009 @ 10:25 AM by OrphenFire
reply to post by booda



The monitor is digital. I don't have cordless telephones. I don't have a land-line at all, only cellphones.


reply posted on 18-11-2009 @ 11:31 AM by LightFantastic
reply to post by OrphenFire


It sounds like a nearby and or powerful transmitter was transmitting and swamping the analog radio and making the sound on the digital monitor.

We have an emergency system in the UK that does similar, it seems to pulse for about half a second every 4 seconds or so.


reply posted on 18-11-2009 @ 12:38 PM by OrphenFire
reply to post by TheRedneck



Yeah maybe. My first thought in that dead hour was "WTF? Is someone trying to jam my baby monitor so they can kidnap my kid?!" My second was maybe an electronic warfare plane was passing overhead. (I was in the Navy and took advanced electronics.)

But why would a signal be jamming my radio or baby monitor? When I get home I will find out what frequency the monitor was on. The radio was tuned to 102.9 FM.

By the way, I live in the DFW metroplex.


reply posted on 18-11-2009 @ 12:46 PM by OrphenFire
Originally posted by PapaKrok
reply to
post by OrphenFire


Could it be related to this meteor event over Utah?
www.abovetopsecret.com...



Hhhmm... If the meteor was big enough, maybe. Midnight in UT would be 1:00 AM here in Dallas. The interference happened at 3:00 AM. If that had anything to do with it, it could have been fighters scrambling the skies for some reason. Maybe the meteor was more than a meteor.



reply posted on 18-11-2009 @ 03:16 PM by TheRedneck
reply to post by OrphenFire

It likely wasn't trying to jam your radio; more likely would be a signal that just happened to jam it. But 102.9 MHz is right in the middle of civilian bandwidth. Why would a military exercise be broadcasting anything around that frequency?

2 hours after the meteor... hmmm... you know, I never heard if that meteor actually hit anything; I had assumed it didn't. Perhaps it could have been a localized explosion on the meteor itself, as in some sort of material reached spontaneous combustion? But that wouldn't have been repetitive, would it? I dunno, just thinking out loud. DFW is not exactly close to the path of that meteor (Utah - Idaho as I understand it).

You definitely have a strange occurrence happening there. I'll keep thinking on it; let me know what that other frequency is (and if you can, estimate the frequency of the noise you heard on it). Maybe we'll come up with something.

TheRedneck


reply posted on 18-11-2009 @ 08:18 PM by TheRedneck
reply to post by darklife

OK, so the monitor does operate at a harmonic. I would suspect the actual frequency would be at around 102.9 MHz, with the monitor picking up a double-wavelength harmonic. I say this because the actual jamming was done at 102.9 MHz, and the interference was at the monitor frequency. Depending on the circuitry, a slightly off-frequency signal can give an audio 'whine'.

I did think of something: when I was younger and playing around with electronics, I often made things that would bleed through into radios. Also, experimenters are somewhat notorious for violating power restrictions (that is NOT an admission of guilt! ), especially late at night. That actually sounds like some sort of transmitter project based on the fact it was intermittent and regular. It's amazing what a simple NE556 can accomplish.

I'd look around the neighborhood to see who has a lot of little Radio Shack shrink cards in their trash.

TheRedneck


reply posted on 19-11-2009 @ 10:12 AM by OrphenFire
reply to post by TheRedneck



Haha . Thanks guys. I think you all have it figured out for me. My wife threw away the box for the monitor, and I wasn't feeling like opening the thing up to mess around with it (plus my multimeter and o-scope aren't here, so I can't have much fun with it anyway), so I don't know the exact frequency the monitor operates at. Anyhow, it was probably a tech-head neighbor messing around with stuff. I will find out who it is and make a new friend, perhaps
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