[Prev][Next][Index][Thread]

Re: filter fundamentals




>	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