Just another Don Smith thread

[Vortex 22]

In my no professional terminology

We are trying to combine from 2 different input source

Combien voltage and current?
Or
Voltage and voltage?
Or
Current and current?

But
We pay for one input only!!!

[nix85]

Real cap has internal resistance and does dissipate heat,

and boi does it dissipate it, often they need special cooling.

Where there is current there is a magnetic field (unless it's bucking).

It also has inductance, all this is well known.

Short a cap and it will ring and dissipate heat.

I don't know which calorimeter you used but pass few amps "through"

that cap for bit longer and you will see it does warm up.

That's why electrolytic caps literally have vents, not to blow up.

I wouldn't call a bucking coil a cap, rather a bifilar is a real cap,

as they say it increases capacitance and energy 250,000 times.

(of course this varies with each coil)

Energy in the RLC tank is equal to energy that is first stored

in the cap. Well, that is at least the convention. They do not

admit power ampification, only current or voltage amplification

at the expense of the other which is of course not true.

[Vortex 22]

The resonance thingy is not the secret !!!

[nix85]

Don't make silly claims. Of course i don't think all caps are the same
i know well there are polarized and non polarized and those in which
inductance is reduced to minimum for very high freq. applications
where cap can become an inductor otherwise....
and i know well electrolytic are polarized and can explode
like i said if used with AC or high ripple DC...BUT they also heat up
with DC at higher power and can overheat cause, like i said, they
have internal resistance.

All capacitors have some internal resistance called Equivalent series
resistance ESR which in ceramic caps varies from 0.01 to 0.1 Ohms
while for electrolytic it is UP TO SEVERAL OHMS + it increases over
time with use so can lead to failure.

In short, caps usually don't heat up much, but at higher power
applications, especially if they are electrolytic, they do.

Oh yea, just to add, just recently i was discharging 5 10nF 20kV
caps in parallel and i taped them together not allowing them to
cool. They literally almost melted, they were SO hot you could
not touch em. Tape literally melted. And they are ceramic.

[tomd]

The resonance thingy is not the secret !!!

How about the trumpet waveform coming as a result of  an earth grounding?

https://youtu.be/dICbnzfY464