On Sat, 2009-10-24 at 19:59 -0600, Stephen Cannon wrote:
> Alan,
> I was wondering about the ferrite materials. My initial thought was to use
> 31 Material (because Material 31 is designed for HF); however, I further
> thought that noise in other frequency ranges (other than HF) may affect
> signals within some of the electronics. Should I just stick with 31
> Material on HF receivers or do you have additional suggestions?
You want a lossy material at the subject frequency, not one used for
transformers at the frequency to be filtered. Typically that means a
considerably higher permeability for the noise filter toroid than a
transformer toroid.
73, Jerry, K0CQ
>
>
> Stephen AD7TD
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