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Tweaks for systems, rooms and Do It Yourself (DIY) help. FAQ.

Yes, torroids are NOT all angel.

Hi.

Since the core built up a torroid iron is gapless (vs gapped EI core), very little magnetic flux leakout, therefore low low leakage inductance.

But it is not a all blessing. On the momnet of switching on the power iron, the low primary winding DCR is so low plus low low leakage inductance will generate a hugh incoming current surge.

So for torroids, it is always good practice to get a surge current limiter upstream of the primary winding. If not, at leasst a slow-blow fuse.

Plus it is next to zero DC offset tolerance, which is not at all a healthy feature for push-pull O/P transformers where DC offset is so common due to not perfectly matched O/P power tubes.

Plus EMI/RFI flash-over from the primary to the seocnding winding is much more ready in toroidals.

c-J


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  • Yes, torroids are NOT all angel. - cheap-Jack 12:16:41 04/25/07 (0)

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