I'm tracking a power pole near my QTH that is generating RFI from 15m on up. With a combination of HF and VHF antenna, I'm pretty sure I've tracked to the correct pole. This pole is generating more o
Remember that sound, unlike RF, doesn't go through wood. You need to have line of sight to the ultrasonic noise. I also have a popping noise on a nearby pole, for whatever that is worth. Rick N6RK __
Author: "RFI Services' Mike Martin" <mike@rfiservices.com>
Date: Mon, 7 Jun 2010 19:50:25 -0400
Stu, I'll be on the road for the next few hours and I'd like to hear your noise. If you can, give me a call in about one hour, that's about 9pm est. I'll be able to talk to you while traveling. Mike
Quite a few sources do not generate enough ultrasonic energy to be heard on the ground. But an ultrasonic sniffer on a hotstick (ONLY operated by a qualified lineman) positioned within a few inches o
I have an HV line 1 mile west of me and a city 1 mi east of me. It is usually much quieter to aim the beam to the west than the east. So it seems that the line is not a problem. Rick N6RK ___________
Most people (including me) believe that when it isn't raining...HV lines tend to be far quieter than the LV/MV neighborhood lines. Corona IS an issue with the HV, though. I have a 112kV (I think) lin
Did anyone notice that he said it was a DC line being planned? 73, Jim K9YC _______________________________________________ RFI mailing list RFI@contesting.com http://lists.contesting.com/mailman/lis
Hi Stu, The only sources I have found that had NO audio signal were lightning arresters. As other folks have pointed out, you need a "line of sight" to the source to "hear" it. Sometimes you have to
I did. Haven't read much of this but assume Mr Edison is laughing somewhere and Mr Tesla is rolling his eyes. Don't get how these are more efficient though, since surely there would be loss when the
http://en.wikipedia.org/wiki/High-voltage_direct_current -- Dr. Martin S. Ewing, AA6E Member IEEE, URSI, AAS, ARRL Branford, Connecticut _______________________________________________ RFI mailing li
Look at the line from Oregon to So Cal and then do the math to see if it's a 1/4 wave stub. :) It needs to be DC. -- Hisashi T Fujinaka - htodd@twofifty.com BSEE(6/86) + BSChem(3/95) + BAEnglish(8/95