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eHam Forums => RFI / EMI => Topic started by: ND9B on August 20, 2014, 05:34:10 PM



Title: Best clip on ferrite beads for neighbors stereo
Post by: ND9B on August 20, 2014, 05:34:10 PM
I have some new neighbors complaining that I'm interfering with their surround sound. Some miscellaneous clip-on ferrites have fixed my own HiFi interference, so I would like to try them on the neighbors equipment. Where can I order some good clip-ons that would work really well on 160,80 and 40M. (The ones I have on hand are no-name Ham Fest specials.)

Bob D.


Title: RE: Best clip on ferrite beads for neighbors stereo
Post by: W4TL on August 20, 2014, 05:43:16 PM
Try DX Engineering,  they have a fairly good assortment but are a bit pricey.

73 Terry, W4TL


Title: RE: Best clip on ferrite beads for neighbors stereo
Post by: N1UK on August 20, 2014, 05:58:56 PM
I found some good ones on ebay.  Get the clip on type and try to get as many turns around them as possible.

Go to the Fairite website and pick the best mix type for your frequency.

I got a box full of these

TDK  ZCAT 3035-1330

http://www.farnell.com/datasheets/55153.pdf

http://www.ebay.com/sch/i.html?_from=R40&_trksid=p2047675.m570.l1313.TR0.TRC0.H0.XTDK+3035&_nkw=TDK+3035&_sacat=0


Mark N1UK


Title: RE: Best clip on ferrite beads for neighbors stereo
Post by: KH6AQ on August 21, 2014, 06:52:37 AM
Be generous with the ferrites and run mulitiple cables through a ferrite core; having separate cores for each cable can be much less effective.

I like to threshold the problem before applying a fix. The TX power is raised until the problem begins to show up. Repeat a few times to make sure you have a good power point. As RFI fixes are tried the threshold power test can be repeated. Testing at full power only can mask valuable troubleshooting information.


Title: RE: Best clip on ferrite beads for neighbors stereo
Post by: N4SRN on August 21, 2014, 12:45:25 PM
http://www.mouser.com/ProductDetail/Fair-Rite/0431164281/?qs=KmHvPbTOE4S/bA3UyJViJQ==