Re: "Green Monster" Magnifier completed

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

Original poster: Bart Anderson <classi6-at-classictesla-dot-com> 

Hi Dan,

Coupling about 0.6 is going to be a problem. You will have reduce it. I'd 
say 0.4 would be a good starting point (can always go up from there). Also, 
you'll need to insulate the driver with LDPE or some type of thick poly. 
Should you fire it up (just to see), I expect you'll see L1 to L2 arcing 
(at k of 0.6). Based on the design I saw in your picture, you'll be able to 
adjust k via L2 height, so no worry's there.

The gap I'm using for my hybrid-maggy is my G10/tungsten 1800 rpm SRSG (240 
bps). Regarding your inquiry about quenching; I don't see how the quench 
has anything to do with the arcing problem. The arcing has to do with the 
kilovolts step up at the energy coupled with the proximity allowed for 
voltage standoff between L1 and L2. I really don't see the quench episode 
as a factor there. The quench I feel has more to do with the L3's 
efficiency of spark channel creation and dissipation of the energy in that 
channel (or channels). Whatever energy is in the L3C3 following a spark 
event is going to pass back to the cap and keep the gap conducting.

I think superfast quenching is great if you can attain that. The energy 
isn't going to "swash back and forth more than necessary". The energy at 
cap must be dissipated in the coil I^R losses, the gaps I^R losses, or the 
sparks (same). Air-flow (external or by RSG spinning) helps to maintain a 
regulation of temperature, which goes a long way to stabilize the arc 
quantity between conductions (or bangs), but the coils arc stabilization 
sets the quenching (longer the arc is maintained, the more dissipation in 
the arc channel). Yes, the gap must switch high currents at considerable 
potentials frequently, but the system itself (I feel) is responsible for 
the quenching mechanism (i.e., 1st pri-notch, 2nd pri-notch, etc.).

BTW, I set k on my hybrid-maggy tonight at roughly 0.4 and fired it up. 
Interesting coil! I'll share in a separate post.

Take care,
Bart


Tesla list wrote:

>Original poster: dhmccauley-at-spacecatlighting-dot-com
>
>Bart,
>
>My coupling is also set at about 0.6 initially.  What type of spark gap are
>you using?
>I'm wondering if the spark gap doesn't quench fast enough and allow energy
>from primary and secondary to
>swash back and forth more than necessary, if this would add to the arcing
>problem.
>
>I'm planning on using a 12-electrode ARSG in series with a multiple
>air-blown series gap to try to maintain super fast quenching.
>
>Dan
>
>
> > Hi Dan,
> >
> > I too would like to get the specs on the driver. Love the "green" wire.
> >
> > On similar note, last night I finished up my hybrid maggy. It was late,
>but
> > I did a quick test. Even with the driver wrapped in several layers of LDPE
> > (~0.25 inch altogether), I still got L1 to L2 arcing due to the coupling
> > set high (0.586). I shut it down immediately as not to cause a turn to
>turn
> > short. Today I'll raise the driver 3" which will put k at 0.389 and go
>from
> > there.
> >
> > Take care,
> > Bart
> >
> >
> > Tesla list wrote:
> >
> > >Original poster: Finn Hammer <f-h-at-c.dk>
> > >Daniel,
> > >
> > >Goodlooking coil, I notice the spacing method you use on the primary
>coil.
> > >A quick and easy method.
> > >You give the specs on all the other parts, excluding the master
>oscillator
> > >that you have shown.
> > >Diametres, lengths and turns, perhaps even inductance, would complete
>your
> > >post.
> > >
> > >Cheers, Finn Hammer
> > >
> > >Tesla list wrote:
> > >
> > >>Original poster: "Mccauley, Daniel H" <daniel.h.mccauley-at-lmco-dot-com>
> > >>My "Green Monster" magnifier is finally completed.  Just received the
> > >>nice custom built toroid from D&M High Voltage
> > >>yesterday, so that completes it.  The completed tesla magnifier will
> > >>have the following specifications:
> > >>(also, i think someone else may have already used the term "Green
> > >>Monster."  If thats the case, let me know and I'll
> > >>change the name)
> > >>Here is a picture of the "Green Monster."
> > >>http://users.snip-dot-net/~liche/magnifier01.jpg
> > >>
> > >>HV Transformer
> > >>(2) 14.4kV / 1.5kVA PTs paralleled and ballasted for 7kW output power
> > >>Primary Capacitor:
> > >>(2) 0.03uF capacitors in series (equi-drive)
> > >>Primary Gap:
> > >>10", 12 electrode ARSG in conjuction with air-blown series multiple
> > >>spark gap
> > >>Resonator Coil Dimensions:
> > >>4" x 15" length
> > >>Topload
> > >>(1) 5" x 20" toroid
> > >>(1) 7" x 34" toroid
> > >>Dan
> > >
> > >
> > >
> > >
> > >
> > >
> >
> >
> >
> >
> >
> >
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