RE: RF question

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

Original poster: Thomas <tom-at-pwrcom-dot-com.au> 

FYI: here's a plot I made of my 6" coil last Friday night:

http://www.users.bigpond-dot-net.au/broken.trout/6inch_spct.jpg

The coil was calculated to resonate at 235kHz (Marker 1), and it was
emitting many streamers at the time of measurement.

The receive antenna was a TV rabbit ears (dipole) type, fully extended
(horizontal), about 4m from the coil.



 > -----Original Message-----
 > From: Tesla list [mailto:tesla-at-pupman-dot-com]
 > Sent: Monday, 6 October 2003 02:33
 > To: tesla-at-pupman-dot-com
 > Subject: Re: RF question
 >
 >
 > Original poster: "Gerry Reynolds" <gerryreynolds-at-earthlink-dot-net>
 >
 > I agree, Ed, the primary hi frequency energy, I believe comes
 > from the spark
 > and discharge of the space charge.  Current in the primary
 > loop is a damped
 > sinewave at coil resonance and has fourier harmonics of
 > resonance.  Energy
 > from the space charge (that has no current limit and will
 > look like a delta
 > function) has a fourier spectrum that is spread out over a
 > wide range of
 > frequencies and will not be coherient.
 >
 > Gerry R
 > Ft. Collins
 >
 >  > The radiation efficiency without an antenna would be tiny.  The
 >  > secondary inductance is far, far too high to resonate with anything
 >  > approaching a quarter wave antenna.  The VHF radiation
 > power from the
 >  > primary leads will be much greater.
 >  >
 >  > Ed
 >  >
 >  >
 >
 >