Re: [TCML] My first coil, bigger sparks maybe??

["Quarkster" <quarkster@xxxxxxx>]

Daz -

What is your toroid made of? It looks like it may be made from 
aluminized-Mylar "dryer duct" material, rather than convoluted aluminum HVAC 
duct material.

Is it actual aluminum metal, or is it the silvery plastic film frequently 
used for helium party balloons? Apply a flame from a match or butane 
lighter; the Mylar material will melt instantly, while the aluminum duct 
material will be completely unaffected.

If it's the plastic material, you need to make a new toroid from 
convoluted aluminum duct material.

Finally, how is the secondary wire connected to the toroid?

Regards,
Herr Zapp
----- Original Message ----- 
From: "Darryll f" <darryll_forward@xxxxxxxxxxxxx>
To: <tesla@xxxxxxxxxx>
Sent: Saturday, July 11, 2009 11:30 AM
Subject: [TCML] My first coil, bigger sparks maybe??



Hi all,



I have just finished off my first coil and after its second run and playing 
around with the spark gap, primary tap point and making a smaller top load 
i'm not all that impressed with the output. Maybe i have missed something?



My coil is powered by a 10kv 30ma (240v) nst running a static home made gap 
together with terry filter and separate safety gap, the mmc cap bank is 
rated at 13nf and 21kv, the primary is 11 turns of 8mm dia copper pipe and 
the secondary is 3.25" plastic pipe with approx 1100 turns or 19" of 26 
guage wire. All this is powered off a home brew control panel with 8 amp 
variac various kill switches, neon lights and gauges plus a line filter.



After the first run with a break out point to earth i am getting about 10" 
sparks max, i have used various software and got 30" predicted sparks.

I have not got the equipment to tune it so i'm going on the trial and error 
theory! I am thinking of looking at a rotary spark gap which might increase 
performance but i didn't know if there was anything else i can do in the 
meantime?



Youtube vid of last run



http://www.youtube.com/watch?v=VNvpI72Sj28



Please be gentle this is my first coil and six months ago i didnt  know a 
thing about them!



Any advice appreciated



Daz



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