Re: Advice for new coil

["Tesla list" <tesla@xxxxxxxxxx>]

Original poster: "Dr. Resonance" <resonance@xxxxxxxxxx>


If you are going to 120 mA, then use either a 10 or 12 inch dia. sec.
coilform for even better performance.

Dr. Resonance


>
> Since your wanting to upgrade to 120mA at 15KV, I
> would probably go with a bit larger secodary. I did a
> few calculations for you (using "TeslaMap" and
> assuming 5% real world losses in a few items), and
> this is what I came up with. You can change your
> secondary wire, you could move that down to a 24 AWG,
> that will move it to around 1200 turns, around 2,000
> ft, and around 2.5 lbs of wire. Keep in mind your res.
> cap, and freq will change if you do a different top
> load, but this can give you a general idea of the
> setup. This will be close to one that TheDDN group is
>
assembling,(http://ddn.suroot.com/index.php?option=com_content&task=view&id=
25&Itemid=33)
>
> ---------- Power Supply ----------
> NST V Out 15 kV
> NST I Out   120 mA
> NST Input V 120 V
> NST Input F 60 Hz
> NST VA     1,800.0
> NST Watts 1,825.5 W
> NST Impedance 125 Kohms
> Max Arc Length 72.6 in
> NST PFC Cap 331.6 uF
>
> ---------- Primary Capacitor ----------
> Your Cap   unknown
> Resonate Cap 21.2 nF
> LTR Static Cap 29.7 nF
> LTR Sync Cap 40.3 nF
> Your Cap Joules unknown
> Resonate Joules 4.77
> Static Joules 6.68
> Sync Joules 9.07
>
> ---------- Secondary Coil ----------
> Single build magnet wire
> 26 AWG
> Wire Length 2,491.0 ft
> Wire Weight 1.91 lbs
> Wire Resistance 102.2 ohms
> Coil Height 27 in
> Coil Diameter 6 in
> Coil H/W Ratio 4.5 : 1
> Coil Turns  1,586.6
> Inductance 72.47 mH
> Capacitance 11.00 pF
>
> ---------- Top Load ----------
> Overall Diameter    15 in
> Ring Diameter         4 in
> Top Load Adjustment 95 %
> Top Load Capacitance 18.09 pF
>
> ---------- Top Load + Secondary ----------
> Resonate F 109.62 kHz
>
> ---------- Primary ----------
> Wire Diameter 0.25 in
> Wire Spacing 0.25 in
> Hole Diameter 8 in
> Coil Angle 0 degrees
> Coil Adjust  95 %
>
> Needed primary inductance with:
> Your Cap    unknown
> Resonate Cap 39.76 uH
> Larger Than Resonance Static Cap 28.40 uH
> Larger Than Rresonance Sync Cap         20.92 uH
>
> Turn 1 0.5 uH
> Turn 2 1.7 uH
> Turn 3 3.6 uH
> Turn 4 6.2 uH
> Turn 5 9.5 uH
> Turn 6 13.5 uH
> Turn 7 18.2 uH
> Turn 8 23.8 uH
> Turn 9 30.1 uH
> Turn 10 37.4 uH
> Turn 11 45.6 uH
> Turn 12 54.7 uH
> Turn 13 64.8 uH
> Turn 14 76.0 uH
> Turn 15 88.3 uH  overall diameter of 22.5", tubing
> length of about 60 feet.
>
>
> Hope that helped a bit for a general idea on your
> setup...
> ~Blimpie
>
>
> --- Tesla list <tesla@xxxxxxxxxx> wrote:
>  > Original poster: Rich Simpson
>  > <richcreations@xxxxxxxxx>
>  >
>  > Hi Everyone,
>  >
>  > After destroying the secondary of my first coil by
>  > running it with a 6-MOT
>  > stack (it was only a 4" coil, and not very well
>  > made, but the burnt plastic
>  > smell was impressive) I decided to start again.
>  >
>  > I have all the thin walled 4" green sewer pipe (not
>  > foam cored) I could want.
>  >
>  > I do not want to use the MOTS again right now, but
>  > will continue to use
>  > NSTs instead.
>  >
>  > I have a single static (air blast) gap, made from 1"
>  > pipe, made of
>  > copper/pvc) fed by a shopvac
>  >
>  > Primary will be a flat pancake of 1/4 copper tubing,
>  > how many turns should
>  > it have? what outside dia?
>  >
>  > I have a lot of "beer bottle caps", in series
>  > strings of 3 bottles x
>  > however strings I need, I plan to build a MMC later,
>  > but cash is short.
>  >
>  > I have 15kv/60ma worth of NST right now, but want to
>  > be able to add more
>  > later (120ma total), how much is a 4" coil good for?
>  >
>  > I was planning on using 22AWG wire for the
>  > secondary, is this a good
>  > choice? About how tall should the secondary winding
>  > be?
>  >
>  > I tried using JavaTC, but I do not have enough info
>  > to figure it out, and I
>  > use a mac, so no wintesla, or other useful stuff...
>  >
>  > thanks,
>  > -Rich
>  >
>  >
>  >
>
>
>