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Re: 1994 article
- To: tesla@xxxxxxxxxx
- Subject: Re: 1994 article
- From: "Tesla list" <tesla@xxxxxxxxxx>
- Date: Mon, 08 Aug 2005 23:27:28 -0600
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- Resent-date: Mon, 8 Aug 2005 23:39:32 -0600 (MDT)
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Original poster: Ed Phillips <evp@xxxxxxxxxxx>
"The theory of two coupled tuned circuits has probably been around for
more
than 50 years. The impulse excitation was probably mathematically
explored
in connection with spark gap transmitters.
The Titanic had a spark gap transmitter and that sank in 1912. It may
even
have been understood (in part) for hundreds of years in connection with
sympathetic resonances of organ pipes, strings and tuning forks. When I
briefly worked on traveling wave tubes 35 years ago there were old
papers
(say five years old) discussing the propagation in helices i.e.
secondary
coils."
The theory has been around for more than 100 years. Helix-type TWT's
go back at least to the late 1930's.
Ed