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Author Topic: Where can I buy Ferrite Beads?  (Read 384 times)
CHRISDX
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Posts: 244




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« on: March 20, 2010, 03:30:34 PM »

I have some RF and would like to find ferrite beads to choke off HF frequencies.  I noticed that univ radio has them listed for 2-30MHZ but those are the tiny ones. I need larger ones to use on power leads etc.  

I'm kinda new at this, but I just installed my 706 in mobile the car, and having some feedback through the speakers and car stereo. I think looping the speaker wires and maybe the icom separation cable through the ferrite bead at each end would choke off that RF and stop some of my troubles.

Anyone can point me to them would be greatly appreciated.
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AA4PB
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Posts: 12688




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« Reply #1 on: March 20, 2010, 03:58:19 PM »

Radio Shack had some rectangular shaped ferrite cores that you could wrap several turns of speaker wire around and then snap them closed. You'll likely want several turns on HF rather than just running the wire through them. You can probably find some additional sources for them on the Internet.

Most RFI problems however come from improper grounding of the HF antenna. Check out www.k0bg.com for a lot of good information on proper grounding.
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N3OX
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« Reply #2 on: March 20, 2010, 04:02:16 PM »

I've dealt with these two and they have "normal" online ordering with a wide selection of parts.

http://www.cwsbytemark.com/

https://www.amidoncorp.com/

I've heard that Lodestone Pacific has a good selection but you'll need to contact them with a list of manufacturers' exact part numbers... they may also have some substantial minimum order, I don't remember.

http://www.lodestonepacific.com/
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73,
Dan
http://www.n3ox.net

Monkey/silicon cyborg, beeping at rocks since 1995.
CHRISDX
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Posts: 244




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« Reply #3 on: March 20, 2010, 04:50:57 PM »

thanks for the reply. regarding grounding, I have a trunk lip mount, and have grounded one of its screws to the car chassis.  problems have not gone away.  I will go look at that site, again thanks...
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WB2LCW
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« Reply #4 on: March 22, 2010, 05:06:35 PM »

Mouser sells Fair-Rite Beads at good prices and no minimum order!
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