Just another Don Smith thread

[Vortex 22]

Just charge a capacitor using voltage only?
Here
Where it came the '' grounding '' techniques

[Vortex 22]

Have you ever wanted to learn how to catch fish? Do you want to know how to catch more fish?
Basically the same thing here we are catching electrical charges !!!

[nix85]

Here is what member Gyula said here 10 years ago about Don's primary caps

"The capacitor shown in the photo you uploded in the previous page:  .1uF  +/-10% 4000WVDC was manufactured in the 2nd week of 1977... this is what the last line shows: 7702"

That clears it up.

"4000 WVDC means Working DC Voltage" not 4000 watts

[tomd]

Energy stored in a capacitor according to Don. w=1/2*C*V^2*f^2. There's no current in that formula. Charge the cap at high frequency (KHz or MHz) and discharge at low frequency (50 - 60 Hz).

[nix85]

I guess this is a good time to remind of some basic formulas

wavelength = c/f
f = 1/T
a = v/t
momentum = mv
Kinetic Energy ke = 1/2 mv²
centrifugal/centripetal force: F = mv²/r
Force = Mass * acceleration
Work = force * distance moved  unit: newton meter or joule or Work = Mass * Gravity * Height
Work = Change in Energy
Power = work / time = force * displacement / time = force * velocity
Power (hp,watt) = work(ENERGY)/time aka time rate of energy transfer
Energy = Power x Time
XL= 2πfL
I= V/XL Alternating current flowing through inductor is applied voltage / inductive reactance
XC= -1/2πfC
Z = sqrt(R² + (Xc - Xl)²)
I = (V-E)/Z current through transformer primary E = voltage drop across primary inductance
F = 1/6.2832√LC
F = 1/2π√LC
C= 1/4π²Fr²L
Fl = R/2πL cutoff frequency of RL low pass filter
Fc = 1/2πRC cutoff frequency of RC low pass filter
ohms law: V = IR
power per second:
P = IV
P = I²R copper losses
P = V²/R
P=VI*PF true power (V and I are average, RMS)
energy stored in an inductor E = LI²/2
energy stored in an cap E = 1/2 QV = Q²/2C = CV²/2
for capacitor and inductor circuit V=IZ
for capacitor circuit V=C*(dv/dt)*R
I = C dv/dt current through a cap
1 Volt = 1 Joule/Coulomb
1 Watt = 1 Joule/Second
1 Ampere = 1 Coulomb/Second
V × A = J/C × C/s = J/s = Watt
electric energy E = IVt and E = (V²/R)t
1F = 1C / 1V - amount of electric charge in coulombs that is stored per 1 volt
C = Q / V and C = kA/d
E = F / Q electric field (N/C or V/m) is force per charge
F = qE + qv x B lorentz law, em forces on a charge
R = 80*pi^2*(L/W)^2 rad. res. of antenna where L=length of antenna, and W = wavelength
t = L/R inductor time constant, after ~5t (transient time) current reaches 99.5%
t = RC for RC circuit, after 5RC cap is 99.5% charged
transformer size is proportional to B MAX =V/F
in alternator emf leads flux by 90°+
energy content of wave is proportional to the amplitude squared P = E²
Z = sqrt( L / C ) cable characteristic impedance
reactive load temporary stores energy, not waste it (unless PS cant take it back)
v = L(di/dt) BACKEMF from an inductor
Short circuit current = V / alternator internal resistance
V=--N*dΦ/dt voltage farraday's law
V = BLv farraday law for moving conductor
flux density = amper x turns x core permeability x core area / m² (T)
F = ILxB force on a conductor in a magnetic field - laplace
as load increases, current in the conductor must increase to balance the forces: I = F/BL
free space impedence 376Ohm
C = 1 / sqrt permitivity x permeability of space