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[TCML] New Coil Design - ideas and criticism welcome...
Sorry for the repost - it seems to have been parked in an older thread.
Ideas and criticisms welcome...
Given the poor design of my first coil, I decided to restart from scratch -
hopefully not breaking another finger in the construction...
I am using http://deepfriedneon.com/tesla_frame6.html
for quick reference, and JavaTC for verification (JAVATC file is below)
So far, still using a 6kV 50 mA NST, and a counterpoise below the coil (no
RF ground in my apartment!) -
New secondary: diameter 104 mm (4 inches)(R=5.2 cm); using SWG 27 (diameter
0.4 mm - almost similar to AWG 26) which give me a height of 528 mm (52.8
cm) for 1200 turns. H/D is 5.1
This gives me L=26699 uF and self capacitance 8 pF
>>Shall I go for a smaller n of turns to get my D/H ratio a bit lower?<<
The topload will be a aluminium toroid 76.2 mm by 304.8 mm (3 by 12 inches)
with capacitance around 13.3 pF (DeepFried Neon) and 13.1 pF with JAVATC for
only the topload
Total capacitance at 13.3+8 = 21.3 pF [13 pF using JAVATC] gives me a
resonant frequency at 211 kHz [248 using JAVATC]
>>>The Q is 262 - should I aim for more, or less??
For the primary, I will use 8 mm copper tube, with spacing (centre to
centre) of 16 mm. Starting at Secondary radius + 2 cm = 7.2 cm
This gives me L around 31 uH at 12 turns
Thus I would need a MMC of 0.018 uF to 0.013 uF to reach resonance
Using CDE capacitors 942C20P15K-F (2000Vdc 0.15 uF) I would need a single
string of 11 caps to reach 0.013 uF and have a (recommended) voltage rating
of 22kV
So far I plan to use a static gap, air cooled. I have the Terry filter
ready.
Is the design sound, will it work, will it last more than 10 minutes before
frying, what kind of sparks will I get out of it?
JAVATC file below
J A V A T C version 11.7 - CONSOLIDATED OUTPUT
26 April 2008 19:50:51
Units = Centimeters
Ambient Temp = 25°C
----------------------------------------------------
Surrounding Inputs:
----------------------------------------------------
300 = Ground Plane Radius
300 = Wall Radius
400 = Ceiling Height
----------------------------------------------------
Secondary Coil Inputs:
----------------------------------------------------
Current Profile = G.PROFILE_LOADED
5.2 = Radius 1
5.2 = Radius 2
100 = Height 1
152.8 = Height 2
1200 = Turns
0.04 = Wire Diameter
----------------------------------------------------
Primary Coil Inputs:
----------------------------------------------------
7.2 = Radius 1
23.1 = Radius 2
100 = Height 1
100 = Height 2
10 = Turns
0.8 = Wire Diameter
0.013 = Primary Cap (uF)
100 = Total Lead Length
0.2 = Lead Diameter
----------------------------------------------------
Top Load Inputs:
----------------------------------------------------
Toroid #1: minor=7.62, major=30.48, height=160, topload
----------------------------------------------------
Secondary Outputs:
----------------------------------------------------
246.02 kHz = Secondary Resonant Frequency
90 deg° = Angle of Secondary
52.8 cm = Length of Winding
22.73 cm = Turns Per Unit
0.04 mm = Space Between Turns (edge to edge)
392.07 m = Length of Wire
5.08:1 = H/D Aspect Ratio
54.4022 Ohms = DC Resistance
38772 Ohms = Reactance at Resonance
0.438 kg = Weight of Wire
25.083 mH = Les-Effective Series Inductance
23.559 mH = Lee-Equivalent Energy Inductance
27.001 mH = Ldc-Low Frequency Inductance
16.685 pF = Ces-Effective Shunt Capacitance
15.272 pF = Cee-Equivalent Energy Capacitance
28.882 pF = Cdc-Low Frequency Capacitance
0.1484 mm = Skin Depth
11.056 pF = Topload Effective Capacitance
147.8367 Ohms = Effective AC Resistance
262 = Q
----------------------------------------------------
Primary Outputs:
----------------------------------------------------
248.58 kHz = Primary Resonant Frequency
1.03 % low = Percent Detuned
0 deg° = Angle of Primary
951.9 cm = Length of Wire
3.33 mOhms = DC Resistance
0.79 cm = Average spacing between turns (edge to edge)
1.58 cm = Proximity between coils
0 cm = Recommended minimum proximity between coils
30.163 µH = Ldc-Low Frequency Inductance
0.01327 µF = Cap size needed with Primary L (reference)
1.37 µH = Lead Length Inductance
115.658 µH = Lm-Mutual Inductance
0.128 k = Coupling Coefficient
0.129 k = Recommended Coupling Coefficient
7.81 = Number of half cycles for energy transfer at K
15.55 µs = Time for total energy transfer (ideal quench time)
----------------------------------------------------
Transformer Inputs:
----------------------------------------------------
220 [volts] = Transformer Rated Input Voltage
6000 [volts] = Transformer Rated Output Voltage
50 [mA] = Transformer Rated Output Current
50 [Hz] = Mains Frequency
220 [volts] = Transformer Applied Voltage
0 [amps] = Transformer Ballast Current
0 [ohms] = Measured Primary Resistance
0 [ohms] = Measured Secondary Resistance
----------------------------------------------------
Transformer Outputs:
----------------------------------------------------
300 [volt*amps] = Rated Transformer VA
120000 [ohms] = Transformer Impedence
6000 [rms volts] = Effective Output Voltage
1.36 [rms amps] = Effective Transformer Primary Current
0.05 [rms amps] = Effective Transformer Secondary Current
300 [volt*amps] = Effective Input VA
0.0265 [uF] = Resonant Cap Size
0.0398 [uF] = Static gap LTR Cap Size
0.0692 [uF] = SRSG LTR Cap Size
20 [uF] = Power Factor Cap Size
8485 [peak volts] = Voltage Across Cap
21213 [peak volts] = Recommended Cap Voltage Rating
0.47 [joules] = Primary Cap Energy
176.2 [peak amps] = Primary Instantaneous Current
67.3 [cm] = Spark Length (JF equation using Resonance Research Corp.
factors)
4.5 [amps] = Sec Base Current
----------------------------------------------------
Rotary Spark Gap Inputs:
----------------------------------------------------
0 = Number of Stationary Gaps
0 = Number of Rotating Electrodes
0 [rpm] = Disc RPM
0 = Rotating Electrode Diameter
0 = Stationary Electrode Diameter
0 = Rotating Path Diameter
----------------------------------------------------
Rotary Spark Gap Outputs:
----------------------------------------------------
0 = Presentations Per Revolution
0 [BPS] = Breaks Per Second
0 [kmh] = Rotational Speed
0 [ms] = RSG Firing Rate
0 [ms] = Time for Capacitor to Fully Charge
0 = Time Constant at Gap Conduction
0 [µs] = Electrode Mechanical Dwell Time
0 [%] = Percent Cp Charged When Gap Fires
0 [peak volts] = Effective Cap Voltage
0 [joules] = Effective Cap Energy
0 [rms volts] = Terminal Voltage
0 [power] = Energy Across Gap
0 [cm] = RSG Spark Length (using energy equation)
----------------------------------------------------
Static Spark Gap Inputs:
----------------------------------------------------
0 = Number of Electrodes
0 [cm] = Electrode Diameter
0 [cm] = Total Gap Spacing
----------------------------------------------------
Static Spark Gap Outputs:
----------------------------------------------------
0 [cm] = Gap Spacing Between Each Electrode
0 [peak volts] = Charging Voltage
0 [peak volts] = Arc Voltage
0 [volts] = Voltage Gradient at Electrode
0 [volts/cm] = Arc Voltage per unit
0 [%] = Percent Cp Charged When Gap Fires
0 [ms] = Time To Arc Voltage
0 [BPS] = Breaks Per Second
0 [joules] = Effective Cap Energy
0 [rms volts] = Terminal Voltage
0 [power] = Energy Across Gap
0 [cm] = Static Gap Spark Length (using energy equation)
Thomas Ryckmans
P Pfizer Discovery Chemistry
Office 500.1.177A Lab 500.1.109
Global Research and Development ipc 351
Sandwich Kent CT13 9NJ
Phone +44 1304 643 735 Fax +44 1304 651 817
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