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Re: filter fundamentals
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To: tesla-at-grendel.objinc-dot-com
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Subject: Re: filter fundamentals
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From: jim.fosse-at-bdt-dot-com (jim fosse)
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Date: Thu, 29 Feb 96 22:04 PST
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> In any case of considering insulation, consider what is being insulated
> from what. Ferrites are typically (always, i think) insulators
> in and of themselves. Insulation from turn to turn, expecially
> in primary or secondary filters would not see a LOT of voltage
> normally, per turn, which is what the insulation rating on the
> wire is about. (Some overrating on the insulation might save
> destruction in a fault condition....)
>
> regards
> dwp
>
>
Much to my amazement, I discovered last month, that ferrites are
semiconductors. They vary in resistivity from between 10 ohms/meter to 10^5
ohms/meter. The core has to be insulated. I've found that 3 layers of
electrical tape works.
jim