One more point I'd like to make I just thought of this morning is that if
you decide to make your own line isolator with beads, it is very important
that you buy from a vendor who can specify the mix. I made the mistake of
buying them from RF Parts. They are a great vendor of a lot of good
products but in the case of ferrite chokes, they do not specify the mix.
This was my mistake -- buyer beware. I wound up with chokes that measured
low Xl at HF and almost nothing on 160. I don't know what the mix was but
it apparently wasn't 43 or 77. but at the time they were about 50% the cost
of other vendors. This was another case of you get what you pay for.
Rob/K5UJ
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