[TenTec] Omni VII: RF in TX Audio

[Dr. Gerald N. Johnson]

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