Re: [CAD_CAM_EDM_DRO] Re: New Pix UP!

Some torroid transformers are, or at least used to be, mounted at right angles
to each other. These were RF type, though, and you'd need to ask a HAM about
the details. Some are shielded as well, but then the inside of a radio tends to
be an intricate place, and it's not allways another transformer/coil that needs
the shielding. Other components can pick up stray signals, too, especially
capacitors. You can even use a capacitor to amplify, "gravity waves", which
near as I can tell, sound just like the static you can hear on a receiver. I
allways wondered why no one ever used one of those to subtract noise from the
audio output amps or tape recorder mic inputs, but that's another topic.

Bill

On Sun Feb 17 04:47:37 2002, John H., <johnhe-uk@...> wrote:

>This wasn't explained to us in physics for some reason. You have two coils
>opposite each other in your transformer. The field expands and collapses
>over the coil opposite. The laminate stops it turning the supports into part
>of the equation, fine. But if you look down on a transformer from the top it
>looks like 50% of each coil is pointing the 'wrong' way. The field is
>emitted in a spiral shape up each coil which should also be present _behind_
>the coil pointing away from the other coil. We were told that we should
>assume transformers to be close to 100% efficiency. Does the presence of
>another coil somehow shape the field? This has been annoying me for a good
>while, that means it's probably a really simple answer.
>
>Regards,
>John H.
>
>> > When you mount transformers so close to each other as is pictured
>> > here don't they interfere with each other's magnetic fields?
>>
>>
>> Not power-transformers of this size. Audio-transfomers might do some
>> "crosstalk", and 1 KVA or more might oughta be "at right angles", if
>> touching, or nearly-so. But MOST of the magnetic flux in a
>> decently-efficient transformer is "internal". Now, a TORROID won't HAVE
>this
>> problem, but costs more, and can't be home-brewed as easily... Good
>> question!
>>
>>
>> [Non-text portions of this message have been removed]
>>
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