any update on GSM interference issue

Joerg Reisenweber joerg at
Wed Aug 6 05:18:51 CEST 2008

Am Mi  6. August 2008 schrieb Al Johnson:
> On Tuesday 05 August 2008, arne anka wrote:
> > > The ferrite is increasing the common mode inductance of the cable
> > > because the
> > > ferrite has a better magnetic permeability than air. Taping the ferrite
> > > to
> > > the cable is a bit like a half turn on a ferrite rod. It will still
> > > affect
> > > the inductance, but not as much as if it went through a ferrite ring.
> >
> > anything to pay attention to in particular (size, color,  taste or smell
> > ;-) or just using one that fits?
> Given the less-than-scientific application, probably just one that fits ;-) 
> electronics experience doesn't go beyond audio frequencies though, so don't 
> believe a word I say once it involves RF!

Use one that fits.
there should be those beds with a plastic fixture around and two "half-rings" 
inside, that can easily be opened, cable placed inside, and then close the 
two halves and a plastic nose will snap in and hold the whole thing.

PLEASE NOTE: I'm going to move this thread to [hardware]-ml and join it with 
another thread of same topic from [support], in a few hours.

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