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Re: [TCML] Beginning Tesla Design
Your primary cap looks a little small and close to resonant size, try to get
it up just over 9nf like TeslaMap recommends for a static gap.
Also try to build it to handle at least 1.5 to 2 times your NST secondary
voltage as the caps you will likely use are rated for DC.
My 12/60 powered coil MMC is rated over 30kv.
On Thu, Dec 30, 2010 at 10:05 PM, Futuret <futuret@xxxxxxx> wrote:
> Taylor,
>
> The spark gap is the heart of a Tesla coil in a sense, so it's a good
> idea to build something with good quenching. I assume you'll begin
> by using a static gap. Gary Lau's vacuum gap or pressure gap is
> an excellent design. The TCBOR/Richard Quick gap works well too.
>
>
> If you use a PFC cap on the NST be sure it's not the motor start
> electrolytic type which can explode. A motor *run* cap is OK
> (the type in a metal can... not electrolytic). It's not really necessary
> to use a PFC cap. Using such a cap will just reduce the input current and
> improve the power factor.
>
> You'll probably want to include a safety gap and "Terry Filter" also, to
> protect the NST. Gary Lau has some good comments at his website
> regarding how to connect the various grounds to reduce electrical
> kickback into the house wiring.
>
> Cheers,
> John
>
>
>
>
>
>
>
>
> -----Original Message-----
> From: Taylor Skidmore <balt11t@xxxxxxxxx>
> To: tesla <tesla@xxxxxxxxxx>
> Sent: Thu, Dec 30, 2010 9:32 pm
> Subject: [TCML] Beginning Tesla Design
>
>
> My name is Taylor Skidmore and recently I decided that I wanted to make
>
> a Tesla coil. After spending hours reading over the internet, I decided
>
> that I was ready to craft my own, but I was wondering if you could
>
> simply look over my design and put in any comments you might have. I did
>
> make this with TeslaMap, as my experience in electronics did not allow
>
> me to attempt to make my own calculations, even though I did try. If
>
> there is something wrong, could you please help me find the mistakes?
>
>
>
> Thanks,
>
> Taylor Skidmore
>
>
>
> 12/30/2010
>
>
>
> --- Power Supply ---
>
> NST V Out 12 kV
>
> NST I Out 30 mA
>
> Input V 120 V
>
> Input F 60 Hz
>
> NST VA 360.0
>
> NST Watts 371.4 W
>
> NST Impedance 400 Kohms
>
> Max Arc 32.8 in
>
> NST PFC Cap 66.3 uF
>
>
>
> --- Primary Capacitor ---
>
> Your Cap 5.88 nF
>
> Resonate Cap 6.6 nF
>
> LTR Static Cap 9.3 nF
>
> LTR Sync Cap 12.6 nF
>
>
>
> --- Secondary Coil ---
>
> Single build magnet wire
>
> Wire AWG 22 AWG
>
> Wire Length 1,061.3 ft
>
> Wire Weight 2.06 lbs
>
> Wire Resistance 17.2 ohms
>
> Secondary Height 24 in
>
> Secondary Diameter 4.5 in
>
> H/W Ratio 5.3 : 1
>
> Turns 901.4
>
> Secondary L 14.22 mH
>
> Secondary C 9.22 pF
>
>
>
> --- Top Load ---
>
> Overall Diameter (1) 18 in
>
> Ring Diameter (1) 4.5 in
>
> Overall Diameter (2) (optional) in
>
> Ring Diameter (2) (optional) in
>
> Sphere Diameter unknown
>
> Top Load Adjust 95 %
>
> Top Load C 21.39 pF
>
>
>
> --- Top Load + Secondary ---
>
> Resonate F 241.20 kHz
>
>
>
> --- Primary ---
>
> Wire Diameter .25 in
>
> Wire Spacing .25 in
>
> Hole Diameter 6.5 in
>
> Coil Angle unknown
>
> Coil Adjust 95 %
>
>
>
> Needed primary inductance with:
>
> Your Cap 46.52 uH
>
> Resonate Cap 41.25 uH
>
> LTR Static Cap 29.47 uH
>
> LTR Sync Cap 21.71 uH
>
>
>
> --- Design Notes ---
>
> No notes
>
>
>
>
>
> _______________________________________________
>
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>
> Tesla@xxxxxxxxxx
>
> http://www.pupman.com/mailman/listinfo/tesla
>
>
>
>
>
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>
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