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Re: 12kV / 60 ma Neon Sign Transformer
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- Subject: Re: 12kV / 60 ma Neon Sign Transformer
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- Date: Mon, 07 Mar 2005 18:58:44 -0700
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Original poster: Jim Lux <jimlux@xxxxxxxxxxxxx>
At 04:30 PM 3/7/2005, Tesla list wrote:
Original poster: Davetracer@xxxxxxx
I have not built a Tesla Coil in quite some time. However, if both of
my brain cells that are left remember correctly, one starts at the power
supply. I could be wrong. I've been wrong before, plenty of times!
I do have a 12kV / 60 ma neon sign transformer and I had good luck
with copper tubing as a primary "last time".
Now, what I need to determine (I believe) is the capacitance C to
store up current each 1/60th, the primary's L to determine resonant
frequency, and the secondary's L to make sure it's a 1/4 wave
electrically from the primary's L frequency.
Does anyone happen to have software to do this? I have seen
references to some programs but am not finding them.
Alternately, would someone be willing to give me the numbers to
design the coil with (e.g., "You're going to want 800 turns on the
As I recall finding capacitors was always a joy :-( but I'll give it
a try. If nothing else, I can use aluminum foil in 14 x 14 and plate
glass in 18 x 18.
Again, any pointers to software, or existing designs, would be quite
nice. I too started with the 1964 "Two Tesla Designs" magazine articles.
You can do a lot better these days..
Download one of the Excel spreadsheets, or use the online Java based Tesla
calculators to figure out turns, C, etc. http://www.pupman.com/ -> look at
the left hand column.
The 1/4 wave thing will just cause problems. Ignore it. For all intents
and purposes, you're dealing with two coupled lumped LC circuits.
beer bottles in saltwater in a bucket for low budget
multiminicap (MMC) for more.. (string together a bunch of 2kV, 0.15 uF
caps, but not just any old cap. You need the right type. Check the archives)
800-1000 turns on the secondary, Dave, just like you asked...