On Saturday 13 September 2014 11:03:00 pm Paul Alciatore palciatore@gt.rr.com [Electronics_101] wrote:
> The 600 Ohm impedance which was
> standardized in the early days of AM radio with tube circuits,
I have my doubts about that. It came from telephone systems, I think.
What tube circuits have that sort of impedance? I don't recall any.
--
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