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So your humour is too far stretched.

Posted by cheap-Jack (M) on March 6, 2007 at 09:19:48

In Reply to: Re: You've blown things out of proportion, pal ! posted by Barney Vincelette on March 5, 2007 at 17:13:50:

Hi.

Let me set the record right on some points you mentioned.

You talked about skin effect.

What is it? Skin effect is the effective resistance of the conductor which increases with the signal frequency. It would not be an issue for the entire audio spectrum, regardless of its "higher signal voltage". An approxmate forumula (F.E Terman) for the frequency to increase the skin effect resistance by 10% is:

f = square of (200/diameter of the conductor) in mm

Take #18 26 strands of round copper hookup wire, a popular wire size for DIY projects, its diameter is 0.049"=1.2445mm. So the skin effect frequency f=25.826KHz. No signal voltage involved.

(2) You said higher signal voltage "be more immune to serie inductance". How? Inductive reactance XL=2x3.1416xinductance H x frequency F. Where comes in voltage?

(3) Teflon (TFE,PTFE,FEP) got the very low dielectric sonstant e (=2), only second to foamed PE, & third to free air. & very low signal transit time delay (propagation velocity vc=0.7) That's why it's an excellent compound to make insulation.

I can see you want to talk a lot. Please do it more precisely.

c-J

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