RE: 'true" spark length was Re: Desktop Bipolar Coil

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

Original poster: "John H. Couture by way of Terry Fritz <teslalist-at-qwest-dot-net>" <couturejh-at-mgte-dot-com>


Malcolm -

As I said in my post the single spark length test is something different
than the multiple spark length test and would have to  be treated
differently. As you mention the spark length increases when multiple sparks
are used. It appears that 120 BPS is an optimum break rate. John Freau has
also done a lot of research on this topic.

John Couture

------------------------------------


-----Original Message-----
From: Tesla list [mailto:tesla-at-pupman-dot-com]
Sent: Wednesday, July 02, 2003 7:24 PM
To: tesla-at-pupman-dot-com
Subject: RE: 'true" spark length was Re: Desktop Bipolar Coil


Original poster: "Malcolm Watts by way of Terry Fritz <teslalist-at-qwest-dot-net>"
<m.j.watts-at-massey.ac.nz>

On 2 Jul 2003, at 11:17, Tesla list wrote:

  > Original poster: "John H. Couture by way of Terry Fritz
<teslalist-at-qwest-dot-net>" <couturejh-at-mgte-dot-com>
  >
  >
  > Steve -
  >
  > As you mention in your post we should be able to produce a standard spark
  > length parameter. The coiler normally measures the TC energy input as a
  > continuous watt second input. The TC output therefore should be measured
as
  > a continuous load. This can be accomplished by using a controlled spark.
  >
  > If a spark output is used the output should be a continuous number of
sparks
  > of equal length. This can be done by controlling the spark so the
horizontal
  > distance from the secondary terminal to a ground point is such that the
  > spark fires at every break per second (BPS). This type of operation also
  > gives a meaning for using the BPS as a parameter in calculations.

There is a flaw in the methodology right there. You will find that
there is also a breakrate dependency due to hot air channel latency.
I have done such expts and that is exactly what I found. In the case
of one coil, changing the breakrate from less than 1BPS to somewhere
around 2 - 3 BPS nearly doubled the coil's reach to a grounded rod.
That particular case had a rather low L/C ratio in the secondary
system or, to put it another way, a rather low output voltage/energy
storage ratio in the secondary. I dare say the result was also
dependent to a degree on the humidity content of the air at the time
(I recall it as being rather low).

Malcolm

  > The controlled spark test has been discussed many times in the past on
the
  > List. The test has some problems and has not been accepted by the
majority
  > of coilers. The random maximum spark is used instead which makes no sense
as
  > I have pointed out in other posts.
  >
  > John Couture
  >
  > ----------------------------------
  >
  >
  > -----Original Message-----
  > From: Tesla list [mailto:tesla-at-pupman-dot-com]
  > Sent: Wednesday, July 02, 2003 9:50 AM
  > To: tesla-at-pupman-dot-com
  > Subject: RE: 'true" spark length was Re: Desktop Bipolar Coil
  >
  >
  > Original poster: "Steve Conner by way of Terry Fritz
<teslalist-at-qwest-dot-net>"
  > <steve.conner-at-optosci-dot-com>
  >
  > What is the controlled spark? I haven't heard this term before
  >
  > Steve C.
  >
  > -----Original Message-----
  > From: Tesla list [mailto:tesla-at-pupman-dot-com]
  > Sent: 02 July 2003 01:13
  > To: tesla-at-pupman-dot-com
  > Subject: RE: 'true" spark length was Re: Desktop Bipolar Coil
  >
  > As for pining down the spark length I believe the controlled spark is the
  > best approach.
  >
  >
  >