Topband: Common Mode Isolation

Tom Rauch w8ji at
Wed Dec 28 14:09:18 EST 2005

>          Tom, most seem to recommend ferrites
> on the outside of coax to reduce common mode.  Why
> wouldn't a 1:1 isolation transformer with 2 turns
> on both sides of a binocular core do the same thing?
> Seems like this is how audio isolation transformers
> work and I would think it should work for RF also.

An outboard isolation transformer would work also.

It's just easy to do it all in the one unit by using a
primary secondary transformer, so that's what I do.

73 Tom

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