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Forums
4hv.org :: Forums :: Tesla Coils
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question about conical secondary

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Mates
Sat Sept 29 2007, 08:45PM Print
Mates Registered Member #1025 Joined: Sun Sept 23 2007, 07:53PM
Location: Czech Rep.
Posts: 566
Hi TC people,
do you somebody know what was the exact reason why Nicola Tesla used conical secondary as kind of progressive design and why non of you guys are not experimenting with this shape?

Ok people, I see you have probably no idea why the conical shape should be better for generating HV. Let me make one speculation: Electrons are increasing their energy by every turn of the secondary. In case these turns are also changing diametrically (becoming smaller) it could lead to an additional increase in the enrgy - simillar like when figure skater is doing a piruet. What do you think - is this a complete nonsence ?
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Mates
Sat Sept 29 2007, 08:48PM
Mates Registered Member #1025 Joined: Sun Sept 23 2007, 07:53PM
Location: Czech Rep.
Posts: 566
Mates wrote ...

Hi TC people,
do you somebody know what was the exact reason why Nicola Tesla used conical secondary as kind of progressive design and why non of you guys are not experimenting with this shape?


BTW here is the picture
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Amateur-Scientist
Sat Sept 29 2007, 11:06PM
Amateur-Scientist Registered Member #1015 Joined: Fri Sept 21 2007, 06:43PM
Location:
Posts: 14
The Griffith Observatory has a cone shape coil. Here are a few links:

Link2

Link2
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...
Sun Sept 30 2007, 02:52AM
... Registered Member #56 Joined: Thu Feb 09 2006, 05:02AM
Location: Southern Califorina, USA
Posts: 2445
I think the main reason that no one uses a conical secondary is that it would be a PITA to wind it...


Also, I am pretty sure that the Griffith Observatory ripped out their coil when they did their huge remodel, and replaced it with a new one, although I haven't seen it with my own eyes.
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Amateur-Scientist
Sun Sept 30 2007, 05:17AM
Amateur-Scientist Registered Member #1015 Joined: Fri Sept 21 2007, 06:43PM
Location:
Posts: 14
... wrote ...
Also, I am pretty sure that the Griffith Observatory ripped out their coil when they did their huge remodel, and replaced it with a new one, although I haven't seen it with my own eyes.
Its the same coil with upgraded components (Syncro-RSG, Poly Caps).
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thedatastream
Sun Sept 30 2007, 08:54PM
thedatastream Registered Member #505 Joined: Sun Nov 19 2006, 06:42PM
Location: Yorkshire!
Posts: 329
Derek Woodroffe's Cotton Tess uses a conical secondary.

I can imagine that it is easier to find straight bits of pipe than conical bits of pipe.
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