Re: What the QTC spreadsheet is

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

Original poster: "Malcolm Watts" <m.j.watts-at-massey.ac.nz> 

Hi Carl,

On 5 Oct 2004, at 23:28, Tesla list wrote:

 > Original poster: "Carl Litton" <Carl_Litton-at-hilton-dot-com>
 >
 > Thank you, Malcom.  That helps (although I'm not exactly sure which
 > 'C' to plug into your equation).

My equation?  In all cases, the C I mentioned was the primary
capacitor. Thanks for spelling out what QTC is.

Malcolm

 > BTW, the QTC spreadsheet is apparently a revision of the original by
 > Ed Sonderman (TCML website homepage).  It contains some excellent
 > built in explanatory notes as 'drop downs' that the original did not
 > have among other things.  I found my copy at the website of the
 > redoubtable David Trimmell (www.chaoticuniverse-dot-com) as follows:
 >
 > http://209.210.231.220/webdoc2.htg/qtc.zip
 >
 >
 > Disregard attempt to paste it below (doesn't copy well in plain text)
 >
 >
 > Carl Litton
 > Hilton Hotels Corporation
 > 901-374-5747
 >
 >  >
 > DISCHARGE TERMINAL
 >
 >
 >
 >   TOROID - Pool Eqn				SPHERE
 >
 >
 >
 >   D (maj) =	18	in		Radius =
 > 22	in
 >
 >   D (min) =	3.5			C =	62.1
 > pF
 >
 >   C = 	22.0	pF
 >
 >
 >
 >   input == 	yellow cell			result
 > == 	blue cell
 >
 >
 >
 > SECONDARY CIRCUIT
 >
 >
 >
 > PHYSICAL PROPERTIES
 >
 >
 >
 > Form OD	6.250	in	Turns/in.		37.0		Wire
 > Gauge Calculator
 >
 > Winding Len	25.0	in	Num turns		926
 > Gauge	22	Gauge	24
 >
 > Wire Dia used	0.027	in	Feet of wire		1515
 > Wire Dia	0.025	Wire Dia	0.021
 >
 >    H/D =		4.0		(enter dia in
 > inches in cell B17)
 >
 >
 >
 > ELECTRICAL PROPERTIES
 >
 >
 >
 > Inductance from Wheeler Equation:
 > Secondary Self C from Medhurst Formula:
 >
 > L=	30.1	mH			C = 	11.4	pF  w/  K=
 > 0.720
 >
 >  1.2	mH / inch
 >
 >
 >
 > Self resonant frequency of secondary:
 > Assumed total capacitance:
 >
 > f =	271.3	kHz	Unloaded		topload capacitance>
 > 22.0	pF	<= from D7 or other source
 >
 > f =	158.7	kHz	Loaded		+  secondary self c>
 > 11.4	pF
 >
 >      C total =		33.4
 > pF
 >
 >
 >
 > PRIMARY CIRCUIT
 >
 >
 >
 > CAPACITOR / PSU IMPEDANCE MATCHING
 >
 >
 > V= Transformer Voltage (volts)			V=	60,000	volts
 >
 > I = Transformer Amperage (mA)			I=	200	mA
 >
 > Hz = Line Frequency (Hz)			Hz=	60	Hz
 >
 > Z-matched Capacitance (uF)			C=	0.009	uF
 > Energy 	22.28	Joules	
 >
 > PRIMARY L NEEDED TO FORCE PRIMARY RESONANT FREQ TO EQUAL LOADED SEC
 > RESONANT FREQ
 >
 >
 > Primary Capacitance Chosen =			C=	0.036	uF
 >
 > Primary Inductance Needed =			L(p)=	27.95	uH
 >
 >
 > PHYSICAL PROPERTIES
 >
 >
 > R = minor (small) radius (in.)			R =	4.875	in
 > RESONANCE CHECKER - SEE COMMENTS			
 > N = number of turns			N =	10	turns	Sec
 > F(res) using values chosen = 			159
 > O = angle in degrees (flat = 0)			O=	0	degrees
 > Pri F(res) using values chosen =			121.5
 > D = Diameter of tube or wire			D=	0.250	in
 >
 > S = Spacing between turns			S=	0.25	in
 >
 > H = height of all coils (in.)			H =	0.25	in
 >
 > W= width of all coils (in.)			W=	4.75	in
 >
 > Hy = hypotenuse of coils (in.)			Hy = 	4.76	in
 >
 >
 > L = inductance in microheneries			L =	47.68	uH
 >
 >
 >