[TCML] breakouts and a picture
simon at yesbossmusic.com
Thu Aug 13 06:28:49 MDT 2009
Awesome thanks for that, I will be working on it this weekend so
hopefully some more pics will be up soon!
Sent from my iPhone
On 13 Aug 2009, at 02:06, bartb <bartb at classictesla.com> wrote:
> No problem Simon,
> I ran the numbers in Javatc also with the correct primary height.
> The coil is basically 200kHz with top terminal installed. Your data
> calls out the .02uF cap size (which is not a great cap size here as
> it is too damn close to transformer resonance). But, with this .02uF
> cap size, the coil should tune in at 7.5 to 8 turns on the primary.
> There is a problem, the coupling is rather low at .085. You can
> raise the coupling to roughly 0.12 as a good place to start by
> reposition the relative heights of the primary and secondary either
> by lowering the secondary further down into the primary or raising
> the primary up. However, there is also a problem doing that with
> your coil. In order for 0.13k, the primary would need to be
> positioned at 59.8cm above ground (versus the current 45cm). This
> really cuts down on your toroid to primary distance, so I would
> recommend another option in this specific case.
> That is to add inner turns. It looks like your were playing it safe
> with the primary to secondary distance at a large 9cm from edge of
> sec to edge of pri. You can safely reduce this distance down to
> 3.5cm without sec to pri flashover on your particular coil. I've
> done this before (adding a turn or two on the inside of a primary).
> Simply use the same tubing size. Where the two tubes butt together,
> insert a non-insulated butt-splice that fits snug on the inside
> between the two primary ends. Then just sweat solder the joint.
> Anyway, with a primary height of 48.3cm, inner radius of 9.5cm at
> 8.7 turns, your coil will be tuned to 200kHz with a coupling of 0.12
> and should help out quite a bit with sparks. I'll also foward my JTC
> output to you off-line for reference.
> Take care,
> Simon Dodd wrote:
>> I have just seen the help file, yes the primary height is 45, sorry
>> about that!
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