[sdiy] Ferrite beads on module power inputs

[David]

I use these from Mouser:

Mouser # 81-BL01RN1A2A2B

David

David M. Ingebretsen, M.S., M.E
Collision Forensics & Engineering, Inc.
2469 E. Ft. Union Blvd., Ste 114
Salt Lake City, UT 84121

dingebre at CFandE.com
dingebre at 3dphysics.net
801 733 5458




-- -----Original Message-----
-- From: synth-diy-bounces at dropmix.xs4all.nl [mailto:synth-diy-
-- bounces at dropmix.xs4all.nl] On Behalf Of David Schwan
-- Sent: Tuesday, March 22, 2011 10:08 PM
-- To: synth-diy at dropmix.xs4all.nl
-- Subject: Re: [sdiy] Ferrite beads on module power inputs
-- 
-- I used to think ferrite beads were useless.
-- 
-- Now that I'm a licensed amateur radio operator I know better.
-- 
-- Most consumer products have to RF protection.
-- 
-- I also concur regarding digital circuits, and switching power supplies. I
am part of a team
-- that designs high end high current switching regulator IC's. We are very
concerned of the
-- high frequency signal components in our chips.
-- 
-- Bottom line, adding inductors on supplies takes little room.
-- 
-- On the negative side, finding the ferrite beads on a wire (like Scott at
Bridechamber.com)
-- ships is difficult. I just ordered 100 ferrite beads on wire from
alltronics in Santa Clara.
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