"Richard Clark" wrote in message
...
On Sun, 29 Apr 2007 18:51:52 -0500, "amdx" wrote:

I gave you a little bit of a trick question when I ask,

The loss in a capacitor would be dielectric and loss in the plates
right?

In my inductor the interwinding capacitance is made of a dielectric
(some type of insulation and air) and the plates (made by the wire).
The wire has more current because of that interwinding capacitance,
and as you say "loss is by the square".
Is my argument moving you at all?

Hi Mike,

I'm afraid that if you have expressed an argument, it was lost on me.

Why does the resistance go up near resonance?

I haven't seen that happen.
Try measureing the Q of an aircore coil close to it's self resonance
(or worse, at self resonance without an additional capacitor)
and then at half that frequency.

You have a moving target. Skin effect is shifting as you double/halve
the frequency. What does it mean to compare Q at so disparate
frequencies?

I agree that skin effect is just one more charactistic that needs to be
added to the mix.

Are you exploring an intellectual curiosity or trying to
remedy a defect in application?

No, I just have experienced the effect that Bill ask about and
gave my own pet theory about why it happens.
Now I'm looking for a little confirmation or where I went wrong.



However, for the same resistance, as you
approach resonance, the circulating currents climb, and loss is by the
square.

I'm defining circulating currents as those that circulate between
turns
and don't necessarily go through the capacitor used to resonate the coil.
Does that fit your definition as used in your paragraph above?

Going between turns can be through a turn-to-turn capacitive coupling,
the magnetic coupling has already been discussed in regard to
increased skin effect due to proximity.

Loss still remains the province of resistance.

Richard, That's like saying rain has water in it. No matter how many times
you say it,
I'm still going to agree with you.


Your best argument is that Capacitance exacerbates loss.

I would rephrase that as "interwinding capacitance exacerbates loss".

And with that, you have summed up my argument perfectly.

You have helped reduce my argument to 4 words.

Now, do you agree that interwinding capacitance will reduce Q?
(yes, I know it's the province of resistance)

Thanks, Mike