Re: Fritz vs TCBOR -- initial results in...

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

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

Hi Brett,

So "my" gap did better :o))

Interesting about the wood base thing.  I just used wood since it was easy, 
but it turns out to be a poor choice!

The performance difference appears to be due to the TCBOR gap not quenching 
well.  Quenching depends on many things, but your test seems to have ruled 
out most of them.  I have thought that the many gaps each run cooler and 
therefor can turn off far easier than larger fewer gaps.  Maybe a fan 
cooled TCBOR gap with many more pipe sections like mine would be the best 
of both worlds?

It would be cool if you could write your work down for reference.

Cheers,

         Terry



At 02:59 AM 3/2/2004, you wrote:
>Luke, Terry et. all:
>
>I ran quite a few tests tonight, plus managed to
>capture more than a few clean waveforms of the efield
>surrounding the secondary using the Tek 922 and a wire
>antenna as usual.  I placed the scope a little closer
>than my usual 20 feet this time...8 feet to be exact.
>Time base in the photos was 20us per division.
>
>http://www.hot-streamer-dot-com/brett/misc
>
>The Fritz gap got noticably hotter to the touch during
>the short runs (30 seconds or less) than the TCBOR,
>however this did not adversely affect performance (in
>terms of spark length and ferocity).  I did not do any
>actual spark measurement since the difference between
>the performance of the gaps at this spacing
>(~.154-.158) was so drastic it did not matter what the
>actual lengths were.
>
>At this distance both the static gap units began to
>fire at around the 55-60V mark on my 140V 20A 60hz
>variac.
>
>As you can see from the waveforms and the arcs the
>Fritz gap is the clear winner (although I may have
>forgotton to upload a picture of the TCBOR arcs at the
>test spacing...I'll do it in a day or two) with the
>TCBOR showing a clear 3rd notch quench and the Fritz a
>1st.  Or is that a 2nd?  Maybe someone can help me out
>a bit on that one...is that the end of the first
>secondary ringup/modulation envelope at the left of
>the screen?  Oh well...it's almost 5 in the morning
>and I need to hit the sack.
>
>If there is enough interest I can condense this mess
>into the form of a paper using Acrobat or Microsoft
>Word.
>
>-Brett
>
>PS:  Hope you enjoyed this, Luke.