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Collected coil data (fwd)
---------- Forwarded message ----------
Date: Fri, 24 Jul 1998 20:11:52 -0600
From: terryf-at-verinet-dot-com
To: tesla-at-pupman-dot-com
Subject: Collected coil data
Hi All,
Here is a summary of the coil data that was sent to me. The coils
were all so different form one another that I hesitate to make any judgments
at this point. I was surprised how varied the coils were. Hopefully, this
data will be of use to many of us. It is interesting to see how such a wide
mix of coils are operating. This is a giant post but I thought all the
details would ge of interest to many. Plese SNIP the data in any responses.
:-))
Terry Fritz
Submitted coil data 7-24-98 Summary
Coil:1 Mark Graalman - Pandora
Fundamental Frequency: 140 kHz (static)
Primary Inductance: 17 uH
Primary Capacitance: 91 nF
Primary Firing Voltage: 11900 V (potential xfmr)
Primary Energy: 6.44 J
Spark Gap Type: Rotary + 2 series
Coupling Coefficient: 0.18
Secondary Inductance: 26.6 mH
Secondary Capacitance: 32 pF
Terminal Type: 6.5 x 36 inch toroid
Arc Length: 90 inches
Arc Character: Light blue with white core, ~0.25 inch dia.
Square root (Ls/Cs): 28831
Coil:2 Malcolm Watts
Fundamental Frequency: 145.3 kHz
Primary Inductance: 12 uH
Primary Capacitance: 100 nF
Primary Firing Voltage: 7-8 kV (lab xfmr)
Primary Energy: 3.2 J
Spark Gap Type: Single Static
Coupling Coefficient: 0.12
Secondary Inductance: 45 mH
Secondary Capacitance: 26.3 pF
Terminal Type: Only 1/4" copper ring.
Arc Length: 51 inches
Arc Character: Single streamer Between white and thin purple.
Square root (Ls/Cs): 41364
Coil:3 Gary Lau
Fundamental Frequency: 216.6 kHz
Primary Inductance: 54 uH
Primary Capacitance: 10 nF
Primary Firing Voltage: 21000 V (neon)
Primary Energy: 2.2 J
Spark Gap Type: 10 x 0.03 inch gaps
Coupling Coefficient: 0.141
Secondary Inductance: 12.9 mH
Secondary Capacitance: 23.9 pF
Terminal Type: 4.5 x 15.5 inch toroid
Arc Length: 42 inches
Arc Character: single or multiple, thin
blue
Square root (Ls/Cs): 23232
Coil:4 M. Baumann (a)
Fundamental Frequency: 158.2 kHz
Primary Inductance: 72.3 uH
Primary Capacitance: 6.9 nF
Primary Firing Voltage: 17000 V (neon)
Primary Energy: 2.02 J
Spark Gap Type: RQ 7 gaps at 28 mil
Coupling Coefficient: ?
Secondary Inductance: 30.0 mH
Secondary Capacitance: 33.75 pF
Terminal Type: Smooth 6 x 21 inch dryer
duct.
Arc Length: 37 inches
Arc Character: Bright purple, lots of
corona.
Square root (Ls/Cs): 29814
Coil:5 M Baumann (b)
Fundamental Frequency: 363.7 kHz
Primary Inductance: 27.76 mH
Primary Capacitance: 6.9 nF
Primary Firing Voltage: 17000 V (neon)
Primary energy: 1.0 J
Spark Gap Type: RQ 6 gaps at 30 mil
Coupling Coefficient: ?
Secondary Inductance: 5.67 mH
Secondary Capacitance: 33.78 pF
Terminal Type: 3 x 8 inch dryer duct.
Arc Length: 15 inches
Arc Character: Many bright hot purple
streamers
Square root (Ls/Cs): 12955
Coil:6 Terry Fritz - Rho
Fundamental Frequency: 111.1
Primary Inductance: 102.1 uH
Primary Capacitance: 19.87 nF
Primary Firing Voltage: 21000 V (neon)
Primary Energy: 4.38 J
Spark Gap Type: TF 2-60 gaps at 4 mil
Coupling Coefficient: 0.1475
Secondary Inductance: 75.4 mH
Secondary Capacitance: 26.78 pF
Terminal Type: 2 x 12 inch salad bowls
Arc Length: inches
Arc Character:
Square root (Ls/Cs): 53062
Coil:7 Bart Anderson
Fundamental Frequency: 76 kHz
Primary Inductance: 72.75 uH
Primary Capacitance: 60 nF
Primary Firing Voltage: 14.4 kV pig (max)
Primary Energy: 12.4 J
Spark Gap Type: Sync rotary
Coupling Coefficient: ?
Secondary Inductance: 60.2 mH
Secondary Capacitance: 50.6 pF
Terminal Type: 6.6 x 29.5 inch toroid
some roughness
Arc Length: 84 inches
Arc Character: thin purple, occasional white hot.
Square root (Ls/Cs): 35004
Here is the long text of the responses for those wanting more specific details:
COIL #1
Return-Path: wb8jkr-at-juno-dot-com
From: wb8jkr-at-juno-dot-com
To: terryf-at-verinet-dot-com
Date: Wed, 15 Jul 1998 16:43:39 EDT
Subject: Coil Specs
X-Juno-Line-Breaks: 0-30
Hi Terry,
In response to your request for coil info here
are the specs on my Pandora coil:
Power input: 5 KW
Spark Length: 7-8 feet, longest recorded distance: 98"
Spark appearance: Light blue with white core, about the
diameter of a pencil.
Secondary inductance: 26.6 mh
Secondary length, diameter: 30" long 8.5" diameter
Secondary turns: 700 turns of # 18 wire
Secondary self C: approx 15 pf
Secondary Terminal C: approx 32 pf (6.5" X 36" Torus)
Pri-Sec coupling: .18
Primary inductance: approx 17uh
Primary turns: 5.5 turns 3/4"dia alum tubing flat pancake
Primary Capacitance .091 ufd, flat plate oil filled
Spark Gap type: 8 point rotary with 2 series static gaps
700 BPS.
Drive transformer: potential transformer
Static frequency with terminal: 140 Khz.
Frequency during operation: 130 Khz.
Mark Graalman TCBA# 1399
_____________________________________________________________________
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COIL# 2
Return-Path: MALCOLM-at-directorate.wnp.ac.nz
From: "Malcolm Watts" <MALCOLM-at-directorate.wnp.ac.nz>
Organization: Wellington Polytechnic, NZ
To: terryf-at-verinet-dot-com
Date: Thu, 16 Jul 1998 09:20:10 +1200
Subject: Re: Request for coil data. (fwd)
Priority: normal
Hi Terry,
Here is data on one permanent system I have:
> Secondary Inductance: 45mH
>
> Length and diameter of secondary: Ls = 46", Ds = 9.9"
>
> Wire size and number of turns: 0.56mm Cu dia., spacewound, 980 turns
>
> Secondary Capacitance: 26.3pF all up
>
> Coupling Coefficient from primary to secondary if you know it: 0.12
measured from transfer envelope.
> Primary Inductance: about 12uH
>
> Primary Capacitance: 0.1uF
>
> Spark Gap Type: single static set to 7 - 8kV
>
> Type of Top Terminal (size, smoothness and construction): 9" sphere
(most sparks and certainly the longest ones emanate from a 1/4"
copper ring (not shorted turn) I have placed around the top of the
secondary to prevent former damage.
> Primary Voltage: 7 - 8kV
>
> Power Source (neon, pig, etc.): modified lklab demo transformer
>
> Output Arc Distance: usually around 4', occasionally 4.5' in dry air
(may also coincide with low air pressure) attached both ends.
> Output Arc "Character" (White hot, thin purple, single streamer, many
> streamers....)
Single streamer including air and excluding air branches. White,
probably halfway between thin purple and Nemesis type arcs. Not all
that thick.
> Any other information you feel is important...
Primary cap is a bit lossy (dry-fired extended foil poly). Wallplug
consumption uncertain but using a "standard power meter taking
average readings shows a distinct jump when streamers attach to
ground. Probably a power factor related thing. I've never measured it
to the nth degree. Average wallplug with attached streamer around
1500W.
This coil can do a lot better with more Ctop and more primary
inductance. I once ran it at around 130kHz and the discharges were
loud and bright. Xp is far too low. Primary is also too lossy.
Unfortunately, this coil was built in an idle moment in '93 here at
work and the boss at the time insisted on reimbursing me for the
materials so technically I don't own it and as such, don't do much
with it any more (other than occasional measurements). No incentive.
I have nowhere else to run more than small coils :( Story of my life.
Greg Leyh currently has my coil data chart. You might ask him.
Unfortunately, I left out things like Hs since I was looking at data
such as Xs/Xp, E.BPS and other secondary data.
Cheers,
Malcolm
P.S. - sorry to hear about the prang. Plastic bumpers are expensive :(
COIL#3
Return-Path: lau-at-hdecad.ENET.dec-dot-com
Date: Thu, 16 Jul 98 10:44:59 EDT
From: Gary Lau 16-Jul-1998 1031 <lau-at-hdecad.ENET.dec-dot-com>
To: terryf-at-verinet-dot-com
Cc: lau-at-hdecad.ENET.dec-dot-com
Apparently-To: terryf-at-verinet-dot-com
Subject: Data on my coil
Hi Terry:
Here's the requested data on my coil:
Secondary Inductance: 12.9 mH (measured with LCR meter)
Length and diameter of secondary:
4.25"D x 23.25"L wound on 1/16" wall dried/sealed PVC drain pipe. Many
layers polyurethane. Low voltage self-resonant with no topload at 489 KHz.
Wire size and number of turns:
871 turns (calculated from length x #22TPI) of #22 AWG
Secondary Capacitance (this is combined terminal and self capacitance):
46.5 pF w/2 toroid configuration, 23.9 pF w/ 1 toroid configuration
The C-self of the secondary (w/ no topload) is 8.4 pF.
Coupling Coefficient from primary to secondary if you know it: 0.141
Primary Inductance: 54 uH when tuned with two toroids.
Primary Capacitance: 0.01 uF commercial, measured.
Spark Gap Type: 10 series 0.03" static gaps w/ fan
Type of Top Terminal (size, smoothness and construction):
I use two different configurations:
1 toroid - 4.5" x 15.5" toroid made from aluminum flex duct, stiffened and
smoothed with 2-part wood filler and spakel, covered with aluminum
tape. Very smooth, I use this to give a multiple spark breakout.
2 toroid - On top of the above I place a second toroid, 6.25" x 24" flex duct,
covered with aluminum tape, but not quite as smooth as the smaller
one. The two together bearly break out in a single arc without a
nail, I use this when striving for longest-discharge measurements,
with a nail to ensure continuous breakout.
Primary Voltage: 15KVRMS 60mA, strongly mains-resonant. No idea what the Vgap
or rep rate is.
Power Source (neon, pig, etc.) NST
Output Arc Distance: 42"
Output Arc "Character" (White hot, thin purple, single streamer, many
streamers....):
Either single or multiple (see toroid section) streamer, mostly thin electric
blue, going slightly towards white if it connects to a target. The .JPG I sent
you last month shows the single toroid configuration and the photo's sparks
appear whiter and brighter than they do in person.
Regards, Gary
COIL# 4 and 5
Return-Path: baumann-at-optivus-dot-com
Reply-To: <baumann-at-proton.llumc.edu>
From: "Michael Baumann" <baumann-at-proton.llumc.edu>
To: <terryf-at-verinet-dot-com>
Date: Wed, 15 Jul 1998 08:28:06 -0700
X-MSMail-Priority: Normal
Importance: Normal
X-MimeOLE: Produced By Microsoft MimeOLE V4.72.2106.4
Secondary Inductance
Length and diameter of secondary
Wire size and number of turns
Terry: Here is some info for your research, sorry for the missing
data, but I don't have access to an LCR, just the ol' C :)
Two coils will be listed, a) and b) Both perform very well given
the small power input (in my opinion)
Secondary Inductance
a) Unknown
b) Unknown
Length and diameter of secondary
a) 6.25" x 25"
b) 3.5" x 10"
Wire size and number of turns
a) 22 AWG unknown turns
b) 24 AWG Unknown turns
Secondary Capacitance (this is combined terminal and self capacitance)
a) Unknown
b) Unknown
Coupling Coefficient from primary to secondary if you know it
a) Unknown
b) Unknown
Primary Inductance
a) Primary constructed as 8.5 ID, 1/4" tubing 1/4" spacing, tapped at 13
b) Primary constructed as 6.5 ID, 1/4" Tubing 1/4" spacing, tapped at about
9.25 turns
Primary Capacitance
a) 0.014 mf Poly/Al Plate
b) 0.0069 mf Poly/Al Plate
Spark Gap Type
a) RQ style, 3" sections, 7 gaps, abou .201" Ducted fan cooling
b) RQ style, 2" sections, 6 gaps, about 0.180" total
Type of Top Terminal (size, smoothness and construction)
a) 6" x 21" Aluminum dryer ducting, with pie plate center. very
smooth, except for joint, but most breakout does not occur there.
b) 3" x 18" same as above.
Primary Voltage
a) 12KV
b) 12KV
Power Source (neon, pig, etc.)
a) paired 30ma neon
b) single 30ma neon
Output Arc Distance
a) Maximum measured with breakout and grounded target 37"
b) Maximum measured with grounded target 15"
Output Arc "Character" (White hot, thin purple, single streamer, many
streamers....)
a) When not striking ground, bright purple, with substanial corona
cloud around many branched streamer. On strike whitehot.
With breakout point, single streamer, without breakout intermmitant
breakout in random directions, these are hotter, and louder, and
quite possibly longer, but was not in the direction of my target
so unable to measure. Occasionaly supports pairs of streamers, but
most often solo.
b) Many bright hot purple streamers - snarling and walking around
the toroid. (if I had more primary, I'd go for a bigger topload)
--
Michael Baumann Optivus Technology Inc.|Loma Linda University Medical
Center
San Bernardino, California. (909)799-8308 |Internet: baumann-at-llumc.edu
COIL#6 .....
COIL# 7
Return-Path: baumann-at-optivus-dot-com
Reply-To: <baumann-at-proton.llumc.edu>
From: "Michael Baumann" <baumann-at-proton.llumc.edu>
To: <terryf-at-verinet-dot-com>
Date: Wed, 15 Jul 1998 08:28:06 -0700
X-MSMail-Priority: Normal
Importance: Normal
X-MimeOLE: Produced By Microsoft MimeOLE V4.72.2106.4
Secondary Inductance
Length and diameter of secondary
Wire size and number of turns
Terry: Here is some info for your research, sorry for the missing
data, but I don't have access to an LCR, just the ol' C :)
Two coils will be listed, a) and b) Both perform very well given
the small power input (in my opinion)
Secondary Inductance
a) Unknown
b) Unknown
Length and diameter of secondary
a) 6.25" x 25"
b) 3.5" x 10"
Wire size and number of turns
a) 22 AWG unknown turns
b) 24 AWG Unknown turns
Secondary Capacitance (this is combined terminal and self capacitance)
a) Unknown
b) Unknown
Coupling Coefficient from primary to secondary if you know it
a) Unknown
b) Unknown
Primary Inductance
a) Primary constructed as 8.5 ID, 1/4" tubing 1/4" spacing, tapped at 13
b) Primary constructed as 6.5 ID, 1/4" Tubing 1/4" spacing, tapped at about
9.25 turns
Primary Capacitance
a) 0.014 mf Poly/Al Plate
b) 0.0069 mf Poly/Al Plate
Spark Gap Type
a) RQ style, 3" sections, 7 gaps, abou .201" Ducted fan cooling
b) RQ style, 2" sections, 6 gaps, about 0.180" total
Type of Top Terminal (size, smoothness and construction)
a) 6" x 21" Aluminum dryer ducting, with pie plate center. very
smooth, except for joint, but most breakout does not occur there.
b) 3" x 18" same as above.
Primary Voltage
a) 12KV
b) 12KV
Power Source (neon, pig, etc.)
a) paired 30ma neon
b) single 30ma neon
Output Arc Distance
a) Maximum measured with breakout and grounded target 37"
b) Maximum measured with grounded target 15"
Output Arc "Character" (White hot, thin purple, single streamer, many
streamers....)
a) When not striking ground, bright purple, with substanial corona
cloud around many branched streamer. On strike whitehot.
With breakout point, single streamer, without breakout intermmitant
breakout in random directions, these are hotter, and louder, and
quite possibly longer, but was not in the direction of my target
so unable to measure. Occasionaly supports pairs of streamers, but
most often solo.
b) Many bright hot purple streamers - snarling and walking around
the toroid. (if I had more primary, I'd go for a bigger topload)
--
Michael Baumann Optivus Technology Inc.|Loma Linda University Medical
Center
San Bernardino, California. (909)799-8308 |Internet: baumann-at-llumc.edu
Terry Fritz