Re: Jonathon's 6" Coil (fwd)

["Tesla list" <tesla@xxxxxxxxxx>]

---------- Forwarded message ----------
Date: Fri, 29 Jun 2007 08:51:08 -0700 (PDT)
From: H.S. J. <hsheltonj@xxxxxxxxx>
To: Tesla list <tesla@xxxxxxxxxx>
Subject: Re: Jonathon's 6" Coil (fwd)

Well, Since we are on a roll with formulas, here is a more accurate formula for spark length given to me a while back by Bart:

Spark Length (inches) = sqrt(VA) + sqrt(eJ x BPS x 1.263)

Where: 
VA = input volt amps = transformer effective input power.
eJ = effective cap energy in joules = 0.5 x C(tank) x eVp^2.
BPS = break per second.
eVp = effective cap voltage = x_vp*(1-pow(2.7182818,(-rsg_fr/rsg_t1))).
x_vp = transformer peak output voltage.
rsg_fr = rotary gap firing rate (1/bps).
rsg_t1 = time for cap to charge to one time constant based on cap size and transformer current.

Hope that helps^^

-Shelton 


----- Original Message ----
From: Tesla list <tesla@xxxxxxxxxx>
To: tesla@xxxxxxxxxx
Sent: Friday, June 29, 2007 8:41:42 AM
Subject: Re: Jonathon's 6" Coil (fwd)


---------- Forwarded message ----------
Date: Fri, 29 Jun 2007 09:54:44 -0500
From: D.C. Cox <resonance@xxxxxxxxxxxx>
To: Tesla list <tesla@xxxxxxxxxx>
Subject: Re: Jonathon's 6" Coil (fwd)





To test the true peak output of a resonance transformer, it must be operated 
in a "single-shot" mode.  I use 1 pulse every 120 seconds which gives any 
residual ions time to clear the previous spark channel.

The peak potential is then a function of the spark's distance between two 
standard 1/2 inch dia. rod gaps.  I think chip has posted this information 
in the archives for reference.

In short summary:

60 cm = 332 kV     70 cm = 382 kV     80 cm = 435 kV     90 cm = 488 kV 
100 cm = 537 kV

40 cm = 225 kV     30 cm = 172 kV     20 cm = 124 kV     15 cm = 102 kV

Actually, you were around 560 kV output.  You can also check this value by 
using the equation:

Vsec = Vpri x 80% x SQR(Lsec/Lpri).  This equation is very close, usually 
within a few percent.

The peak potential is totally independent of the waveform.

Dr. Resonance


Resonance Research Corp.
www.resonanceresearch.com


----- Original Message ----- 
From: "Tesla list" <tesla@xxxxxxxxxx>
To: <tesla@xxxxxxxxxx>
Sent: Friday, June 29, 2007 7:02 AM
Subject: Re: Jonathon's 6" Coil (fwd)


>
> ---------- Forwarded message ----------
> Date: Thu, 28 Jun 2007 19:58:50 -0400
> From: Jonathon Reinhart <jonathon.reinhart@xxxxxxxxx>
> To: Tesla list <tesla@xxxxxxxxxx>
> Subject: Re: Jonathon's 6" Coil (fwd)
>
> Thanks.. I had no idea on that MV number...  What's the formula for that?
>
> On 6/28/07, Tesla list <tesla@xxxxxxxxxx> wrote:
>>
>>
>> ---------- Forwarded message ----------
>> Date: Thu, 28 Jun 2007 15:43:54 -0500
>> From: resonance <resonance@xxxxxxxxxxxx>
>> To: Tesla list <tesla@xxxxxxxxxx>
>> Subject: Re: Jonathon's 6" Coil (fwd)
>>
>>
>>
>> Nice to hear you have your coil running properly.
>>
>> BTW, 46 inch streamers represent around 240 kV in Tesla coil service.
>>
>> Resonance Research Corp.
>> www.resonanceresearch.com
>>
>>
>> ----- Original Message -----
>> From: "Tesla list" <tesla@xxxxxxxxxx>
>> To: <tesla@xxxxxxxxxx>
>> Sent: Tuesday, June 26, 2007 10:20 PM
>> Subject: Jonathon's 6" Coil (fwd)
>>
>>
>> >
>> > ---------- Forwarded message ----------
>> > Date: Tue, 26 Jun 2007 20:11:05 -0400
>> > From: Jonathon Reinhart <jonathon.reinhart@xxxxxxxxx>
>> > To: Tesla list <tesla@xxxxxxxxxx>
>> > Subject: Jonathon's 6" Coil
>> >
>> > Hello everyone.  I read the post about people maybe not giving updates
>> on
>> > their projects, etc. so I thought I'd give a little feedback.
>> >
>> > Some of you have heard about, and some of you helped (thanks!) get my
>> coil
>> > started a few years back, and a little bit of help lately with my RSG.
>> > Almost a year ago, before I went to school I built with the help of my
>> > dad,
>> > a pretty decent SRSG.   A week or two ago, I got it hooked up, after
>> > doubling my tank cap from 17nf  to 34uf.
>> >
>> > At first, my results were quite disappointing.  I was getting plenty of
>> > bright sparks at the SRSG, but absolutely no output from the coil, 
>> > which
>> I
>> > had tuned to its previous (Segmented SSG) sweet spot.   I played and
>> > played
>> > with the rotation of the motor, but got nothing.  I was starting to get
>> > worried, concerned that I had possibly blown one of my caps due to the
>> > SRSG
>> > being out-of-phase.
>> >
>> > Getting frustrated and ready to go inside for the night, I grabbed my
>> > primary tap and threw it on about 1/2 way in.  Keep in mind this 
>> > primary
>> > is
>> > only about 10-11 turns anyway.  Turned off the lights, and threw the
>> > switch
>> > for my coil.  Hey!  About 4 inches of breakout.  So I knew it was just 
>> > a
>> > matter of fiddling with it.  After playing and playing with the SRSG 
>> > and
>> > the
>> > primary coil, I had set a new personal record for streamer length of 
>> > 46"
>> > to
>> > a (poorly) grounded point.  This only beat my previous record of 44 by
>> two
>> > inches, but hey it's progress.
>> >
>> > Points for improvement have been noted, however.  When adjusting the
>> SRSG,
>> > I
>> > keep getting longer and longer streamers, but then the safety gaps 
>> > start
>> > firing.  I believe I have them set too conservatively far in.  I think 
>> > I
>> > will open them up some.  Also, my topload is 4" aluminum dryer duct
>> around
>> > standard-sized pie pans.  I have some 6" aluminum flexible duct work
>> (HVAC
>> > style) that is more ridgid, and longer, so I can stretch it out around 
>> > a
>> > larger  pizza-sized pie pan.
>> >
>> > Glad to be playing with ~0.75MV again :-)
>> >
>> > Jonathon
>> >
>> >
>> >
>>
>>
>>
>>
>>
>
>
>


       
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