Re: [TCML] Q: Why won't this work better?

[Futuret <futuret@xxxxxxx>]

Rev. Fuzzy,

Well building a coil is a process over time.  Yes you should be able to 
get a little more spark length.  Generally speaking the higher 12kV or 
15kV NSTs will tend to do a little better for a given input power.  But the
lower voltage shouldn't reduce the spark length more than 10%, maybe less.

Assuming your NSTs are both giving full output power, I would suspect
the spark gap may not be quenching well.  However if that's the case,
then I'd expect the coil to give a longer spark when you first turn it on,
then the spark length would quickly diminish.  

I assume also that you tried tapping the primary at various points along
the 6th turn, since the tuning may be critical.  

I assume also there are no shorted turns in the secondary, which could
result if you had racing sparks along the secondary at some point in the past. 

Many coilers use a 140V step up type variac to power the coil, and
that can help some also.  

If you're not 100% sure that both NSTs are working properly you
may want to check them out too.  

There's definitely something limiting the spark length.  It's just a matter
of finding it.  

Sometimes the sound produced by the coil can give a clue too.  It should
sound steady and smooth, not pulsed or irregular.  If you can create a
video that we can hear, that maybe be helpful.  Or you can listen to
various other static spark gap coils on YouTube to compare the sound.
For a good comparison, the coil should also be using an LTR cap.  
A smaller STR type cap will tend to give a different, even smoother sound.  

Cheers,
John

 

 


 

 

-----Original Message-----
From: Reverend Fuzzy <pastor@xxxxxxxxxxxxxxxxx>
To: Pupman Tesla List (Pupman Tesla List) <tesla@xxxxxxxxxx>
Sent: Mon, Jul 4, 2011 1:29 pm
Subject: [TCML] Q: Why won't this work better?


I've been dealing with a 3.5" SG coil for close to a year now, and can't get 

better than 12 to 15 inches of streamer length out of

it.  The various programs I've tried say that I should be getting between 30 to 

40 inch streamers.  Pics and notes can be seen

on-line 

At: http://www.msbministries.org/galleries/msb3/index.htm


Please note that it no longer uses the spherical topload shown in the pictures, 

but instead uses the toroidal one specified in the

tech notes.


Thanx a meg in advance for all constructive input.

---

Reverend Christopher "Fuzzy" Mayeux

Pastor, MSB Ministries

Hattiesburg, MS





 
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