[ARC5] Fwd: Re: [MRCA] SCR-274-N receiver bandwidth spec

[J. Forster]

The shield has two functions:

Electric field shielding
Magnetic field shielding

The eletri field shieldsing will depend drastically on the way the oils
are wound. Simplified:

 ///////// || ////////     =====> High E shielding effect
GND      H    H      GND



////////// || //////////   =====> Low E shielding effect
H       GND   GND      H


The H field shielding is pretty much indepensant of connetions.

-John

===============


> -----Original Message-----
> From: arc5-bounces at mailman.qth.net [mailto:arc5-bounces at mailman.qth.net]
> On
> Behalf Of J. Forster
>> It is almost certainly at AC ground. It also shields between the coils
>> to
>> prevent capacitive coupling, which might be significant, depend9ng on
>> the
>> geometry.
>
> This goes back to what was mentioned earlier about installing a shield
> between the coils to reduce coupling rather than going through the trouble
> of spreading them apart.
>
> Best Regards,
>
> Michael, K3MXO, CBLA #6, BL01hx15np24 ... or there abouts
> Sometimes I pretend to be normal but it gets boring so I go back to being
> me.
> http://www.nationalmssociety.org/chapters/NTH/index.aspx
> http://wh7hg.blogspot.com/
> http://kludges-other-blog.blogspot.com
> Hiki Nô!
>
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