Can anyone ID this pulse rfi? - RFI Forum at eHam.net

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eHam.net Forum : RFI : Can anyone ID this pulse rfi?

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Can anyone ID this pulse rfi?	Reply
by W8BUX on October 11, 2008	Mail this to a friend!
Here's a 30 second clip I just made: http://ac8rc.org/ac8rc/audio/20m_rfi.mp3 I made this recording on 14.260Mhz, where supposedly 9L1X is transmitting. It's about S-7 there. I can hear it from 13-18 MHz right now, 1845Z, 11 OCT 2008. I can hear it strongest from my shack with my Cobra Ultralite Sr antenna at about 30 feet. I can also hear it from my mobile rig in the driveway. This noise is very common for me. Sometimes I can hear it all the way up to 6m, sometimes as far down as 40m. Most of the time 10m is wiped out by it. Seems to vary in strength, possibly with atmospheric conditions. The frequency of the pulse is quite stable. I can't hear it with my HT at all, or I'd try to radio-locate. I've turned off the main breaker to my house and still hear it. Anyone heard anything like this before? Power lines or something? Thanks, Pete W8BUX

RE: Can anyone ID this pulse rfi?	Reply
by N3OX on October 12, 2008	Mail this to a friend!
Pete your server is returning a 404 Not Found The requested URL /ac8rc/ac8rc/audio/20m_rfi.mp3 was not found on this server.

RE: Can anyone ID this pulse rfi?	Reply
by W8BUX on October 12, 2008	Mail this to a friend!
sorry, url should be: http://ac8rc.org/audio/20m_rfi.mp3

RE: Can anyone ID this pulse rfi?	Reply
by WB2WIK on October 13, 2008	Mail this to a friend!
It's got a nice beat, I think I can write music and lyrics to that. :-)

RE: Can anyone ID this pulse rfi?	Reply
by K0BG on October 13, 2008	Mail this to a friend!
Actually, you have two separate and intermixing signals, albeit they may be the same source. I suggest you look at them on an O-scope. Alan, KØBG www.k0bg.com

RE: Can anyone ID this pulse rfi?	Reply
by KU4GW on November 20, 2008	Mail this to a friend!
Hi Pete, This sounds exactly like the same RFI pulse noise I received from a Black & Decker Firestorm Fast Charger for my 18 volt cordless drill. It only does it when the battery is on the charger to complete the circuit.Good luck and 73! Cliff KU4GW

RE: Can anyone ID this pulse rfi?	Reply
by W6NFL on March 12, 2009	Mail this to a friend!
This sound is likely some type of charging device. Also could be a router or network switch.

RE: Can anyone ID this pulse rfi?	Reply
by W8BUX on August 21, 2009	Mail this to a friend!
Finally! It was an old TV on the third floor. Not on, just plugged in and connected to cable.

RE: Can anyone ID this pulse rfi?	Reply
by W1AEX on August 22, 2009	Mail this to a friend!
Ouch. That was making quite an ugly sound. Glad you located the source and resolved the problem!

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