Hi Mike,
As you may have guessed, there is a lot of critical information missing
from
this description.
1) Your MMC cap bank appears to be one string of 16 caps. What size, type
and voltage rating are they?
2) Your primary coil: One needs to know the inner as well as the outer
diameter, and the spacing between turns. e.g. If it's 1/4" tubing on 1/2"
centers
then the spacing is 1/4".
3) Secondary: What is the diameter? Can you take a magnifying glass and
count the turns in one inch?
4) Spark gap seems to be mounted through a wooden holder. If so, this is
bad. Wood can be conductive at high voltages.
5) Toroid. OK, it's 4" material, but what diameter? This is a critical
dimension.
Without this info, meaningful advice is almost impossible.
Matt D.
In a message dated 3/15/08 8:26:53 P.M. Eastern Standard Time,
mike8675309@xxxxxxxxx writes:
I am very new to coiling. It is something that my Father and I talked
about doing many years ago, but never found time to do something like
that. Recently I found someone selling a coil they had started
building, but hadn't quite completed. He had all the components.
Now last year I completed the construction and fired it. It worked
OK, but I knew I really didn't know what I was doing.
My main issue is I have a secondary that the original construction of
is unknown. Thus it is difficult for me to verify any numbers. Also
my secondary took some hits, and I would like to wind a new one. The
actual device itself is also kind of large, so my goal is to re-wire
everything to make it more compact, and then create a new primary and
secondary that is optimized for the NST I have.
So I find myself with 3 questions:
#1- What is an optimum design for a static spark gap? Copper pipes?
Brass knobs? titanium electrodes?
#2- For my equipment, either What would my optimum primary layout be,
or how would I calculate this?
#3- Based on the primary design what would my optimum secondary be or
how do I calculate this?
Thank you for any assistance
Mike H.
Farmington, MN
Details on what I have to work with:
Some pictures of the components Here:
_http://s8.photobucket.com/albums/a23/tcw_fort/TeslaCoil/_
(http://s8.photobucket.com/albums/a23/tcw_fort/TeslaCoil/)
Video of the first fire last fall.
_http://s8.photobucket.com/albums/a23/tcw_fort/TeslaCoil/?action=view¤t=
TeslaCoilTests.flv_
(http://s8.photobucket.com/albums/a23/tcw_fort/TeslaCoil/?action=view¤t=TeslaCoilTests.flv)
Transformer is:
Franceformer 12030P
120v NST 12000v 30mA, 360VA
I am using a NST filter based on the Terry Filter design:
14 MOVS
12 CAPS 1.6KvDC
2 1kohm 100W resistors
Dual Safety Gaps
My Spark Gap
Brass Cabinet Knob for Spark Gap - Microwave Fan
Primary Coil
1/4 Copper Soft Tube
14.25" diameter coil
1" spacing from Secondary
13 turns
Secondary Coil
Unknown turns
16" of turns
19" Total Height
Top Load
Aluminum tape covered toroid made from MDF and 4" Aluminum duct
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