Can anyone ID this type of interference?

[brandon]

HF bands are pretty quiet for me, especially after learning what was causing my previous problem a few months ago (those damn Ionic Breeze purifiers).

I've noticed another strange noise source which I am not sure of. At first I thought maybe it was my wireless LAN, but it still occurs with it powered off. I've also turned off my other networking equipment and the noise is still there.

Here is a recording of the noise: 6782 KHz - Strange Noise Interference

Anyone heard this type of noise before? It appears in certain portions of the band and is most noticeably occuring in the 3-8 MHz range. Thankfully no BPL here but we do have Verizon Fiber Optics connected to the house for Internet. Could that cause it?

Thanks for taking the time to read my question and for any input that can be provided.

 

[Hoofy]

I've heard noises similar to this that was caused by a scanner. Remember that powering down equipment may not be enough. You should really unplug it or its power source from the house circuit. I had a birdie that went outside my house to my mobile ham radio and it was from a wall wart transformer that wa plugged in to the house current but not into anything else. We have a touch lamp that I can turn on and off when I talk on the 20 mtr. ham band. Anything connected to your house current or your neighbors can be a cause.

Hoofy

 

[SLWilson]

Noise

I've heard similar noise on AM near Ameritech's fiber cables. AND, I've heard similar noise caused by a couple of scanners running on the same antenna. One is scanning and the other one, wit different frequencies in it, makes that sound when the other one receives something....Steve

 

[kb2vxa]

Don't know off hand but it's got a nice beat, it's workable.

"...we do have Verizon Fiber Optics connected to the house for Internet. Could that cause it?"

Possibly the interface pinging it's status on the network, that's it's way of saying "I'm here, all is well." Alarm failsafe systems work that way too, cut the line and it fails to respond to the poll and the central system reports trouble at the location.

BTW Mr. Wilson, fiber cables shouldn't radiate RF, they're only light pipes. If you hear something the cable containes more than strands of glass. The local oscillator in a scanner radiates to some extent and some signal also backs up through the coax. Not much does or it would violate FCC Part 15 but enough to be detected by another receiver nearby. It produces a short burst related to each frequency it scans and going by so fast sounds like dragging a stick along a picket fence. If by chance everything falls together just right the one stopped on something will lock up the other which is receiving a steady 'birdie" from the first one's oscillator. If you get lucky they'll lock each other up.