Re: EMI Filter Freq

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

Original poster: "david baehr by way of Terry Fritz <twftesla-at-qwest-dot-net>" <dfb25-at-hotmail-dot-com>


Howdy, I also just bought  two of the ZAC2220-11 20amp filters. They will
be mounted inside a metal box along with mov's and fuses......I have
paralled the two together for 40 amp service, HOW WILL THIS CHANGE THE
FILTERING ????? this will make the .1uf caps = .2uf and the 450uH inductors
= 900 uH.....??? maybe. The only thing I don't like about these filters is
that the terminals are pretty close together, but with movs in place,
shouldn't be a problem( I hope),I found them at  All Electronics, $5.50
each . Is uf. the same as mf. ??? Thanks, dave PS I'll also be running a 8"
coil : )
>From: "Tesla list" 
>To: tesla-at-pupman-dot-com 
>Subject: Re: EMI Filter Freq 
>Date: Tue, 05 Mar 2002 12:45:32 -0700 
> 
>Original poster: "Jim Lux by way of Terry Fritz " 
> 
>YOU're likely to see LOTS of noise at higher frequencies... And at 
>harmonics of the power line (or breakrate) frequency as well. The filters 
>are a good thing 
> 
>Tesla list wrote: 
> > 
> > Original poster: "Jim Mora by way of Terry Fritz " 
> 
> > 
> > Hello All, 
> > 
> > I am about to first light my 8" coil. Assuming my toroid doesn't turn 
> > out to be too big, my Frs should be around 105 kHz. 
> > 
> > I bought a couple of surplus TDK 20 amp filters (ZAC2220-11). Inet 
> > research reveals these drop 40dB in differential mode -at- 1.5 - 30 Mhz, " 
> > 5 - 30 Mhz, common mode. 
> > 
> > EMI question: will most of the noise the coil generates to the mains 
> > be close to the resonance Freq. (thus making these TDK's paper weights) 
> > or am I likely to see much noise in shorter wavelengths in the form of 
> > harmonics? 
> 
>