On Fri, 13 Mar 2009 14:57:05 -0700 (PDT), Matty F
wrote:

It could pass up to 100,000 Hz without too
much loss. It was rated at 100 watts. The production version had a
toroidal core of grain-oriented silicon steel. I am the only person
alive who knows why it works at such a high frequency

Because it was used for simultaneous multiple calls with a carrier
group system.


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