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Old 17th August 2004, 04:31 PM   #1
wrl is offline wrl  United States
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Question Physical Transformer Proximity Help!

I am just about to finish my Leach amp but I was wondering if there will be any problem in placing a small standby transformer approximately 1 inch above my toroidal power transformer. Any interference with the mag fields?

Would it help to place a copper sheild around the power transformer? If so, what thickness?

Here are some pics of possible configurations. The first two are the ones that I am favoring for layout reasons, but the second two place the two transformers farther apart.


Thanks,

Wes
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Old 17th August 2004, 04:33 PM   #2
wrl is offline wrl  United States
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Pics #2
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Old 17th August 2004, 04:35 PM   #3
wrl is offline wrl  United States
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Sorry about the image quality, the blue thing is the standby transformer.
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Old 17th August 2004, 04:38 PM   #4
wrl is offline wrl  United States
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last one
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Old 17th August 2004, 09:07 PM   #5
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I can't imagine what should be the problem. It seems like a logical arrangement to me.
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Old 18th August 2004, 02:51 AM   #6
wrl is offline wrl  United States
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Anyone else, I have heard of possible interferance from magnetic fields of each transformer with the other. Just want to be certain.


Thanks,

Wes
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Old 18th August 2004, 02:53 AM   #7
wrl is offline wrl  United States
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Also, is copper sheilding recommended? And what exactly does it do... cuts down on stray field lines right?
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Old 18th August 2004, 03:56 AM   #8
Mr Evil is offline Mr Evil  United Kingdom
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Quote:
Originally posted by wrl
Also, is copper sheilding recommended? And what exactly does it do... cuts down on stray field lines right?
Copper shielding will stop electric fields and EM radiation from escaping or getting in (providing the shielding contains gaps no larger than the wavelengths to be shielded against). It does nothing to stop magnetic fields because it's not ferromagnetic.

To shield against magnetic fields you need to use a material like iron (the soft steel used in cases for PCs and other electronic equipment is a pretty good, often free material to use). Note that you can reduce magnetic fields with shielding, but it is impossible to eliminate them entirely, unlike electric fields.
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