Re: Quarter Wavelength Frequency

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: Terry Fritz <teslalist-at-twfpowerelectronics-dot-com>

Tesla was using salt water caps....

His spark gaps and capacitors were chewing up an enormous amount of his 
system's power.

Dielectrics losses in his coil forms and such was far down on his list ;-)))

With the discovery of polypropylene in 1951 by Paul Hogan and Robert Banks 
of Phillips Petroleum, capacitor losses got low enough for Tesla coils :-)))

The first practical use of poly was wasted on hula hoops ;-)))

http://inventors.about-dot-com/library/inventors/blhogan.htm

""""""""
Wham-O is the most successful manufacturer of hula hoops in modern times 
and the company that trademarked the name Hula Hoop® and start 
manufacturing the toy out of Marlex in 1958. Twenty million Wham-O hula 
hoops sold for $1.98 in the first six months. 
(<http://inventors.about-dot-com/library/inventors/blhogan.htm>Marlex® is the 
tradename for crystalline polypropylene and high-density polyethylene 
(HDPE) plastics invented by research chemists Paul Hogan and Robert Banks 
of Phillips Petroleum.)

Knerr and Melin began working in a LA garage in 1948 to market a slingshot 
that they had originally invented to hurl meat into the air while training 
pet falcons and hawks. It was called "Wham-O" because of the sound it made 
when it hit the target. It became the name of their company.

http://inventors.about-dot-com/library/inventors/blhulahoop.htm
""""""""""

:-))))))))

Cheers,

         Terry




At 01:40 PM 7/10/2004, you wrote:
> > One of Tesla's desired goals was to eliminate capacitance from his
>extra coil entirely and in the Notes, one can read of the many
>schemes he dreamt up to try and achieve this. Eventually, he resigned
>himself to the fact that nature was placing limits on his endeavours.
>Had he been successful, he would have ended up without a resonator as
>it would have had no dynamic energy storage mechanism.
>
>Hi Malcolm,
>
>Tesla was only trying to dispense with a physical capacitor, not
>capacitance.  He developed his "coil for electromagnets" hoping to get
>the
>coil to act as both inductor and capacitor.
>
>Capacitors were not as electrically tight in Tesla's day and were
>cumbersome
>to produce.  By eliminating the capacitor he would have made the coil,
>as
>well as coil production, more efficient.  And we all know how much
>efficiency meant to Tesla.
>
>Dave
>
>"
>
>         Apparently he didn't appreciate the effect of dielectric loss in his
>multilayer coils.
>
>Ed