Re: Terry Gap vs. TCBOR...

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

Original poster: "Malcolm Watts" <m.j.watts-at-massey.ac.nz> 

Hi there,
           A few inches of wire clipped into the probe does the trick
fine. The major drawback I've encoutered is a sensitivity to stray
50HZ (in NZ) e.s. fields from mains wiring etc. I built a little
50Hz series-resonant LC filter to connect across the probe to deal
with this problem.

Malcolm

On 29 Feb 2004, at 11:40, Tesla list wrote:

 > Original poster: "Binny" <binny-at-midmaine-dot-com>
 >
 > Hi can anyone out there point me in the right direction as how to set
 > up an antenna for measuring TC waveforms for my TEK "O" scope?A
 > circuit diagram would be of great help.THANKS in advance and great job
 > moderating the list Terry. ----- Original Message ----- From: "Tesla
 > list" <tesla-at-pupman-dot-com> To: <tesla-at-pupman-dot-com> Sent: Sunday, February
 > 29, 2004 1:13 AM Subject: Re: Terry Gap vs. TCBOR...
 >
 >
 >  > Original poster: Brett Miller <brmtesla2-at-yahoo-dot-com>
 >  >
 >  >
 >  > --- Tesla list <tesla-at-pupman-dot-com> wrote:
 >  >  > Original poster: Terry Fritz
 >  >  > <teslalist-at-twfpowerelectronics-dot-com>
 >  >  >
 >  >  > Hi Brett,
 >  >  >
 >  >  > This will be very interesting!!  I have long thought
 >  >  > that the multigaps
 >  >  > tends to burn off less power so the coils are more
 >  >  > efficient.  They also
 >  >  > quench better.  Looking forward to what your
 >  >  > experiments find!
 >  >  >
 >  >  > Cheers,
 >  >  >
 >  >  >          Terry
 >  >
 >  > Great!  I'm glad to know you are interested.  The glue
 >  > was nice and cured by this afternoon, so I did some
 >  > preliminary test firings.  It wouldn't fire tapped at
 >  > 20 pipes, so I had to reduce it by 4 or 5 and it fired
 >  > at an 80% variac setting or so.  Amazing performance
 >  > with what looked like 4 footers or larger leaping out
 >  > into free space.
 >  >
 >  > I plan on writing a text file with detailed specs,
 >  > exact variac settings, and even VA comparisons if I
 >  > can borrow an amp clamp from one of the hams around
 >  > here.  And I still have yet to drag out the TEK and
 >  > set up an antenna.  I will certainly keep you and Luke
 >  > (and whoever else is interested) posted.  Plus I plan
 >  > on making gap measurements available as well.  Someone
 >  > remind me, if I forget that.  I'll try to find time to
 >  > make a section on my hot-streamer page documenting
 >  > this experiment.
 >  >
 >  > -Brett
 >  >
 >  >
 >  >  >
 >  >  >
 >  >  > At 07:54 PM 2/27/2004, you wrote:
 >  >  > >Luke (and Terry might be interested too),
 >  >  > >
 >  >  > >I have started the restoration of the Fritz linear
 >  >  > >static gap.  I mixed up some T-88 aircraft grade
 >  >  > epoxy
 >  >  > >(good stuff I might add) and set up the cu pipes on
 >  >  > a
 >  >  > >nice 1/2" thick Lexan base I pilferred from my
 >  >  > >plastics crate.  Tomorrow it should be pretty well
 >  >  > >cured and I can start firing up and performing
 >  >  > tests.
 >  >  > >
 >  >  > >
 >  >  > >I'll soon be providing pictures of both the gaps as
 >  >  > >well as scope waveforms of quenching for the
 >  >  > >respective units.
 >  >  > >
 >  >  > >Just remember, the diameter of the pipes is much
 >  >  > >greater in the TCBOR gap, so heat sinking/cooling
 >  >  > will
 >  >  > >be naturally better in the TCBOR.  This is
 >  >  > definately
 >  >  > >something to consider when analysing the results.
 >  >  > >This test will definately not be controlled, nor
 >  >  > will
 >  >  > >it be double blind.  Nevertheless, I think some
 >  >  > >tentative conclusions may not be life threatening.
 >  >  > >
 >  >  > >I must also not forget to take measurements of each
 >  >  > >gap and provide total gap spacing for each gap unit
 >  >  > >tested.  I used two index cards stacked to space
 >  >  > the
 >  >  > >pipes in the Fritz gap.  Those will be easy to
 >  >  > measure
 >  >  > >with a caliper.  I can use a feeler gauge for the
 >  >  > >TCBOR.....something I should have done a long time
 >  >  > >ago.
 >  >  > >
 >  >  > >I hope a few people will take an interest in this
 >  >  > >little project.  I know Luke is interested (plus
 >  >  > me),
 >  >  > >so that makes it worth doing right there.  What
 >  >  > we're
 >  >  > >really wanting to know here is whether or not
 >  >  > >distributing a spark over many gaps for greater
 >  >  > >quenching is desirable over using few gaps to
 >  >  > minimize
 >  >  > >loss?  Where is the balance?  Is this a sensitive
 >  >  > >parameter that must be matched to specific systems?
 >  >  > >If we're lucky we might learn more about whether or
 >  >  > >not 1st notch quenching is the "holy grail" of
 >  >  > spark
 >  >  > >gap design (see Richee Burnett's page).
 >  >  > >
 >  >  > >-Brett
 >  >  >
 >  >  >
 >  >
 >  >
 >  >
 >  >
 >
 >
 >