To: | "Brian Sarkisian" <cqkg8co@gmail.com>, <topband@contesting.com> |
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Subject: | Re: Topband: Wireless Internet RFI Issue |
From: | "Tom W8JI" <w8ji@w8ji.com> |
Reply-to: | Tom W8JI <w8ji@w8ji.com> |
Date: | Mon, 29 Jul 2013 14:11:57 -0400 |
List-post: | <topband@contesting.com">mailto:topband@contesting.com> |
That almost always is a switching power supply issue. The normal mode of
excitation is differential between the power mains and other cables. My
neighbor's system bothered me.
The BEST solution to this is a lightning protection type outlet strip that (if it does not have them) you add capacitors to. I used a system that had F connectors, eithernet, telco, and power. This is thousands of times more effective than throwing beads at it and just hoping common mode impedances are so low the beads do something. 73 Tom I recently had an internet wireless antenna/unit installed as our DSL was painfully slow. Now I notice RFI in the AM broadcast band and into the 160 meter band. There may moreRFI issues on other bands however at this point I haven't noticed anything.I see that Fair-Rate makes a series of "New Low Frequency Suppression CableComponent ferrites, though I am not sure what I should purchase. It looks like that I should be looking for a "certain impedance" for a particular frequency. Any help would be appreciated. 73 de Brian, KG8CO _________________ Topband Reflector ----- No virus found in this message. Checked by AVG - www.avg.com Version: 2013.0.3349 / Virus Database: 3209/6529 - Release Date: 07/29/13 _________________ Topband Reflector |
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