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

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

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

Hi Brett,
            Why is it that the TCBOR waveforms show a clear first
ringup and the "Fritz gap" waveforms do not? I almost think I am
looking at the primary waveform in the case of the latter. No mention
is made of the spark condition for either test although it is easy to
infer that the TCBOR waveforms were captured with air-streamers. The
fact that the latter gap got hotter in operation suggests that my
hypothesis about quench efficiency corresponding to gap loss is not
entirely invalid. However, the waveforms really make the test look a
bit like they are in the apples vs oranges category. Can you comment
on any of these points please?

Malcolm

On 2 Mar 2004, at 7:56, Tesla list wrote:

 > Original poster: Brett Miller <brmtesla2-at-yahoo-dot-com>
 >
 > 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.
 >
 > _
 >
 >
 >