Re: [TCML] Re: The truth about LTR, STR, and resonant modes

["DC Cox" <resonance@xxxxxxxxxxxx>]

This is the current "notch" I was pointing out a few days ago.  At this
notch a coil is operating at it's greatest efficiency.  Slightly 10% above
this notch the current increases and a coil wil produce the longest sparks.

Dr. Resonance




On Fri, May 30, 2008 at 12:02 PM, <Sfxneon@xxxxxxx> wrote:

> Hi Folks,
>
> Don't know if this has much relevance to this thread, but below is
>  something
> I posted here about nine years ago on the subject of a coil running in
> resonate mode at 120 BPS using a static sucker gap (Gary Lau's design)
> instead  of
> a SRSG.
>
> > Malcome, John, Richie, Terry, and All,
> > Just thought I'd report  on some observations while making adjustments to
> > my 8" x 34", NST  powered coil that might have some relation to this
> > thread. (Quick specs;  15,000 V / 150 mA NSTs. C=.0267 uF. Spark
> > gap=static single gap with  vacuum airflow quenching (Gary Lau style) ,
> > Variac input control to  NSTs. Transformer voltage and current were
> > chosen to to resonate at 60  Hz with Maxwell pulse caps on hand.
> > After cleaning and adjusting the gap  to about .36", I started to
> > increase the Variac setting, while watching  the input Volt and Ammeter,
> > and the output mA meter. The gap started  firing at about 30 Volts
> > input, and at about 60 Volts or so, floating  streamers start to break
> > out. At about 90 volts in, the Ammeter is  reading erratically between 25
> > and 30 Amps, streamers are multiple and  about 3' long, and the noise
> > from the gap and streamers is very ragged  and more like 'white noise'
> > (many frequencies). But when 96 volts was  reached, input current
> > SUDDENLY dropped to about 16 Amps, and the output  current dropped from
> 200
> > mA to 100mA, and became very steady. Streamers  shrunk slightly (maybe
> > 10-15%), but most noticeable was the different  sound of the gap and
> > streamers. At between 96 and 98 Volts, the noise  became a steady buzz,
> > like a single note. Probably firing in sync with  the line, because
> > raising the Voltage past 98 Volts would again cause  the current to
> > double and the noise would regain it's raspy sound, and  streamers
> > regained their original length. Past this point, no other  'notch' was
> > found, although streamers grow to almost 6' at 120Volts  input at about
> > 35 Amps. Also, widening the gap to .375" moved this  'notch' up to 100 to
> > 102 Volts. Another thing of interest is this  'notch' effect only happens
> > for a few minutes after removing the oxide  from the spark gap (large
> > copper end caps w/ 3/8" holes in the center  for airflow). After a few
> > more minutes, the safety gaps start to fire. A  light sanding of the gap
> > restores original performance...
>
> Tony Greer
>
>
>
>
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