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[AMPS] Proper Wire Size for "L" Tank Coil?

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Subject: [AMPS] Proper Wire Size for "L" Tank Coil?
From: (Tom Rauch)
Date: Sun, 16 Jul 2000 17:35:35 -0400

> >The torroid is very popular for this purpose, as it is more
> >compact and self-shielding, allowing close-to -chassis mounting.
> >Has anyone run any tests on the maximum power handling capability
> >of such a coil?
>   That depends mostly on the core and is easily calculated from the
> numbers in a Micrometals (or Amidon) catalog.  If you need more power
> capability you just stack cores.

You also have to be careful tapping a toroid. If the core doesn't 
have enough flux leakage, it can develop extremely high circulating 
currents in the turns.

As a general rule, you are better off NOT tapping a toroid with a 
progressively shorting switching system. 

If you do short turns, you'll get a quick lesson in how "self-
shielding" the core really is.

73, Tom W8JI

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