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effective area and saturation point of a 2-hole balun

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ge

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amplifier balun

I've got an output balun saturating of a balanced amplifier.
The core is a 2-hole core nickel-zinc ferrite.

The equation <see attached> calculates the saturation flux density for "toroid" where Ae is the effective area of the core. How do I calculate the effective area of a 2-hole balun. How else do I know the saturation point of a 2-hole balun?

Is there any software that does bifilar and trifilar baluns?

thanks,
GE
 

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