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

[J. Forster]

The winding data might be in the manuals somewhere? If not, some tests can
figure much of it out.

-John

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


> This is all very true however we don't know how the coils are done in the
> command equipment so I'd think experimentation is indicated.
>
> 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!
>
> -----Original Message-----
> From: J. Forster [mailto:jfor at quikus.com]
> Sent: Monday, 24 March, 2014 10:37
> To: Michael
> Cc: arc5 at mailman.qth.net
> Subject: Re: [ARC5] Fwd: Re: [MRCA] SCR-274-N receiver bandwidth spec
>
> 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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>
>
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