Re: Final test on new TC

        Re: Final test on new TC
        Tue, 1 Apr 1997 13:24:07 -0700
        "DR.RESONANCE" <DR.RESONANCE-at-next-wave-dot-net>
        "Tesla List" <tesla-at-pupman-dot-com>

To Malcolm Watts:

Another test relating to quench you might try is as follows:

Set a ground electrode (point) at a fixed distance from your sec. coil
also have a point on the sec. coil.  Turn your variac up to normal
operation point and -- with cold sparkgap electrodes -- hit the start
button.  If your spark jumps out to (for example) around 50 in. and then
suddenly shrinks within about 5 seconds down to 40 in. this is
your sparkgap electrodes are overheating and quenching inadequately.  If
your quench is proper and electrode size is large enough your spark will
stay at 50 in. (or whatever length max. is) and will not "shrink" down
size.  We noted this effect by testing various size electrodes and
it is especially pronounced with small 1/8 inch dia. electrodes either
sub-divided stationary gaps and rotary gaps.  We eliminated this shrink
effect by using 1/2 in. dia. electrodes in a suitably large brass
 No shrinkage of spark discharge from sec. terminal.

Just thought I might mention this effect to keep in mind as you continue
your quench and coupling experiments.


> > 
> > Hi Skip,
> > 
> > > For the first time I have witnessed what R. Hull refers to as
synergy. I
> > > never have been able to get the discharges to emanate from the
> > > placed bump on the toroid. I always seemed to have multiple
> > > which rotated around the toroid but never concentrated at one spot.
> > > this particular instance I achieved what appeared to be pretty good
> > > between the primary turns, cap and toroid size.At this point I
> > > to decouple the secondary by raising it .75" at a time. Interestingly
> > > with the secondary almost exactly 4" above the primary the discharges
> > > became concentrated at the bump on the toroid. .75" above or below
> > > point caused the discharges to again split up and rotate around the
> > > toroid. Also at this coupling the primary tuning became very sharp.
> > > or minus one turn reduced the discharges by almost 1/2. Changing the
> > > size of the toroid also reduced the discharge length. *This is
> > 
> > How did discharge length vary with different secondary heights when
> > the primary was exactly tuned?
> > 
> > Malcolm
> Hi Malcolm and All
> I am sorry that I did not take specific data so I cannot give a tuning
> curve. I am going to back up now because I think there may be a
> relationship between the k factor and the quench. At the point where the
> discharges went from the rotating streamers to a single discharge point
> from the toroid bump there was a dramatic increase in length that one
> could not miss. The rotating streamers were probably about 40"(+) but
> when the quench  got into the second notch it seems that all of the
> energy gets concentrated into the one point and that's where the
> discharges start going well over 50". As I mentioned in another post,
> there are times when the quench jumps to the first notch and this may be
> the time that the discharges reach the 56" to 60" length. I do not know
> why the quench changes. It is not periodic...definitely random. Needs
> more investigation. Raising or lowering the secondary away from this max
> point causes the discharges to be reduced in length and start the
> rotating again.