Re: ferrites on lines?

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: dave pierson <davep-at-quik-dot-com> 

Ferrite cores can be used 'alone' (surrounding wires_ in bead or other
form.

(circuit wise, the look like chokes.)

Or many turns can be wound on them making formal chokes.

They can be effective, they are, however, not magick.

Different ferrites have different characteristics.  Most are lossiest at 
HF/VHF.
Without testing its real hard to tell how effective
a random piece will be.

There is a catch to applying ferrites (or other filtering) in that 'noise' can
easily radiate around them.

(I used to do RFI/EMI work.   8)>>)

Ferrites are most handy at HF/and VHF, where 'lumped components' can
have too many stray responses to be easy to use...

best
dwp