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Re: Ferrite rings



Hi jim

>Question, were these from "IBM AT" power supplies? telecom power
>supplies?
>

They were from a Motorola Codex 6745 statistical multiplexer 


>The high value cores were from the common mode filter inductors, the 2
>windings are effectively in anti parallel, for the mains current but
>in parallel for the RFI. They can therefor have a high permeability
>because the don't have to handle a large current.
>
Sorry have i missed another point here? does the higher permeability
mean, despite higher inductance values, that the current capability is less
due to the core saturating.(a few years since i was at college)?


*******************************************
Ian Hopley ---->  i_hopley-at-wintermute.co.uk
Aberdeen
Scotland
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