Re: 1994 article

["Tesla list" <tesla@xxxxxxxxxx>]

Original poster: "Bob (R.A.) Jones" <a1accounting@xxxxxxxxxxxxx>


Hi Antonio,


> Original poster: "Antonio Carlos M. de Queiroz" <acmdq@xxxxxxxxxx>
>
> Tesla list wrote:
> >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.
>
> There is a review in Drude's paper (1904):
> http://www.coe.ufrj.br/~acmq/drude/project.html
> The first studies of double resonance circuits were done by 1895.
>
I tried to access your papers. The untranslated ones in gif format are not
much use to me. The ones in dgf a trv I could not open.

Do you know when complex (real and imaginary) analysis was first commonly
used on such problems?

I did a Google and was surprised that Mr. Laplace presumably the inventor
(or did he discover) of Laplace Transforms lived 1749-1827.
Almost 200 years ago !!!!

Robert (R. A.) Jones
A1 Accounting, Inc., Fl
407 649 6400