[RFI] Adding a shield to the utility service lines?

David Cole dave at nk7z.net
Thu Dec 5 00:52:19 EST 2013


Be careful...  This sounds like something I might read in the Darwin

Thanks and 73's,
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On Thu, 2013-12-05 at 00:33 -0500, Aaron Kreider wrote: 
> Have you ever heard of a shielding product that would clamp on to 
> existing utility service lines?  I'm interested in shielding the service 
> lines from PECO that run in a T shape on my small city lot. Ideally 
> there would be EMT that could clamp on to them, like how the hot water 
> copper pipe insulation works.
> I guess I could cut emt into half and then fit them back together. It'd 
> need to be fairly light.
> Another crazy option is to use a metal conducting paint and paint the 
> power lines.   There are paints designed for RFI shielding.  I could 
> spray them, but it'd be hard to get full coverage.
> This might be a crazy idea, but it is more likely to work than me 
> putting up $200 of ferrites on the power lines - as I don't have any 
> slack in them and would have to use the monster choke clamps. The 
> ferrites might help a bit, but possibly only 1-2 db - whereas with a 
> better shield I should get a 10+ db reduction.
> The downside is that I'd need some 20 foot step ladders to do this, 
> whereas with the ferrites I can just place them at two points (on both 
> sides of my property).
> I could track down the noise sources in my neighborhood. But there are a 
> lot of them, and with a high turnover of renters every year - it'd be an 
> endless fight.
> Aaron
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