[TCML] Slow progress.

[Barton B. Anderson]

Not a performance difference, but each has it's use. Flat is easy, far 
away from the top terminal, and coupling is the least aggravated by it's 
geometry. Cones are fine as long as it's a shallow angle. As the angle 
is increased, the coupling increases for the same horizontal distance 
from the coil as compared to a flat coil. But also, cones naturally 
allow the primary to be compacted towards the secondary, so the coupling 
is even higher due to that geometrical change.

Where higher coupling is permissible, then cone and helical coils offer 
a coupling advantage. But, from a performance standpoint, I have never 
seen anything to suggest increased performance. It's all about balancing 
the energy transfer over time without over stressing the secondary that 
would cause breakout somewhere along the secondary (racing sparks).

Take care,
Bart


Tim Meehan wrote:
> Ah - I see what you mean about how you used them - I think that I could
> probably get my drill and a saw and attempt one.
>
> Is there any real difference between the performance of a flat coil primary
> and a inverted cone shape primary?
>
> On Nov 15, 2007 10:57 PM, Barton B. Anderson <bartb at classictesla.com> wrote:
>
>   
>> Sorry Tim, my last link of my ty-wrap method didn't get pasted
>> correctly. Here's the correct link:
>> http://www.classictesla.com/photos/tgk/21.jpg
>>
>> Take care,
>> Bart
>>
>>     
>>> Here's an old picture of one my coils using a ty wrap primary (note I
>>> used acrylic strips between wood and primary).
>>> http://www.classictesla.com/temp/Pristand.gif
>>>
>>>       
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