Re: A new beginning

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "Dr.Resonance by way of Terry Fritz <teslalist-at-qwest-dot-net>" <resonance-at-jvlnet-dot-com>


Looks like an efficient design.  The polyethylene will crack after a few
years if it sees much of a temperature differential.  Best to use Dolph's
AC-43 synthetic enamel. Look up Dolph's online at their website.  It will
flex and not crack with time.

With the 12/30 low power design I would definitely use #28 AWG wire on the
secondary coil instead of the #22 AWG you are proposing to use.  Much better
output.

Use a 750 Ohm, 25 Watt resistor in series with your RF choke, placed on the
cap size of the choke.  This will clip the harsh transients by "spoiling"
the Q factor of this part of the circuit.  Between the choke and xmfr (each
bushing to ground) use 3 pcs in series of .001 MFD, 10 kV DC ceramic disk
caps.  These caps are available from All Electronics, p/n HVD-102.

You are in good luck.  John Freau is a very knowledgeable coiler in NJ.  Top
off this small coil design with one of his 12 x 3 toroids for good output.

Happy coiling,

Dr. Resonance






----- Original Message -----
From: "Tesla list" <tesla-at-pupman-dot-com>
To: <tesla-at-pupman-dot-com>
Sent: Saturday, January 11, 2003 11:27 AM
Subject: A new beginning


 > Original poster: "Arthur Ignatz by way of Terry Fritz
<teslalist-at-qwest-dot-net>" <aignatz-at-optonline-dot-net>
 >
 >
 > Hello all, My name is Art, I am getting ready to build a coil, I have
built
 > one in the past and had ok results, but now I am striving for perfection!
 > the old coil put out only 17" streamers, but was using thin wire and a
 > bunch of alligator clips, and so on, the capacitors I built were platecaps
 > in oil, had good luck with them they never failed, until the ex-wife threw
 > them across the shop ( catastrophic capacitor failure? ). below is my
trend
 > of thought, I figured I would toss it out here to get some feed back and
or
 > answer a few questions "?" and see if I am heading in the right direction.
 > Oh yea, by the way, The "Fantastic Plastic" coil looks awesome! :-)
 >
 > 12/30 with a 4.5 x 25.25 sec:
 >
 > 1) Feet of wire on a 4.5" x 25.25" coil, with #22awg wire, is the
thickness
 > of #22awg .0253"?, 1000 turns aprox.
 >
 > (Radius*pi*(length of coil/.0253))/12 = Feet of wire?
 >
 > Set Feet = 588
 >
 > 2) .418 Mhz Frequency Secondary coil, Or .209Mhz?????? I found 2 formulas
 > and 2 answers? I am thinking .418 Mhz sounds right?
 >
 > 3) Transformer Impendence Z=V/I (12000/.03=400,000)
 >
 > Set Z = 400,000
 >
 > 4) C=1/(2 x pi x Z x .00006)
 >
 > Set C= .0066uf -at- 1- 12/30
 >
 > 5) Reactance of capacitor: XC=1/(2*pi*C*F)
 >
 > Set XC = 57.727272727272729074996825817448 -at- .418Mhz?
 >
 > Set XC = 115.37983405241071173617787688308 -at- 209 Mhz?
 >
 > 6) Inductance needed for Primary coil:
 >
 > L=XL/(2*pi*F)
 >
 > Set XL = XC
 >
 > Set L = 22 microhenries -at- .418Mhz?
 >
 > Set L = 88 microhenries -at- .209 Mhz?
 >
 > The Primary is going to be flat, placed on a round piece of wood sealed
 > with polyurethane and pvc supports, also going to be a 1" margin from the
 > inner most turn on the Primary and the Secondary coils. The diameter is
 > 22", I need 22uh for a 12/30 -at-418 Khz.
 >
 > (A) Average Radius in Inches, 7"
 >
 > (W) Width of Coil in Inches ,7.5"
 >
 > Number of Turns in the Winding 12
 >
 > I am going to use 1/4" od copper tubing spaced 3/8"
 >
 > The inductance is 50.95uh, Over kill??????? or a good margin for error?
 >
 > The Secondary will be sanded, and sealed inside and out with polyurethane,
 > before and after winding. dose the ends of the Secondary have to be
caped?,
 > or can the ends be left open?
 >
 > Is the frequency of the Secondary coil high?
 >
 > Is there a relationship between Secondary coil frequency and coil output?
 > Or is it just the relationship between the primary tank circuit being in
 > tune with the secondary or vice versa.
 >
 > For now the topload will be just regular old dryer duct 4"
 >
 > I am going to use the Geek Group bucket cap. To connect the electrodes to
 > the top terminal can I connect all the electrodes together and run one
wire
 > to the top terminal ( to much resistance? ) or connect each electrode to
 > the terminal? I have an abundance of flat ground strap 1/4" wide would
this
 > be a good choice of wire? Also I drink Bud and I noticed that The Geeks
say
 > "Corona is best", Should I change my brand of beer?
 >
 > RF Chokes I am thinking about winding #22 awg on 1-1/2 pvc 6" in length.
is
 > the wire to thin? is the choke to long or short? xxx uh?
 >
 > The Safety Gap will be placed after the RF Chokes but before the Static
 > Gap? any other NST protection circuits needed?
 >
 > I do have 3, 12/30 Xformers all from different manufacturers, is there
 > anything I need to be aware of before I hook all 3 of them up, besides
 > adding more capacitance and re tuning the primary?
 >
 > And last but not least, Is there any coilers in New Jersey?
 >
 > Thanks in advance
 >
 > Art
 >
 > PS: there is a fellow that spins torids that are really cool looking, I
 > need one for my TC how do I get in touch with him?
 >
 > --------------------------------------------------------------------------
----------------------------
 >
 > 12/60 -at- .418Mhz Secondary
 >
 > Set C = .01326
 >
 > Set XC = 28.71
 >
 > Set L = 10.93
 >
 > --------------------------------------------------------------------------
----------------------------
 >
 > 12/90 -at- .418Mhz Secondary
 >
 > Set C = .02
 >
 > Set XC = 19.037628100391961917433350025526
 >
 > Set L = 7.25
 >
 > --------------------------------------------------------------------------
----------------------------
 >
 > 15/60 -at- .418Mhz Secondary
 >
 > Set C = .01
 >
 > Set XC = 38.07
 >
 > Set L = 14.50
 >
 > --------------------------------------------------------------------------
----------------------------
 >
 > 15/90 -at- .418Mhz Secondary
 >
 > Set C = .016
 >
 > Set XC = 23.797035125489952396791687531907
 >
 > Set L = 9.06
 >
 >