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Re: Basic Electricity

Subject: Re: Basic Electricity
From: Walter Knapp <>
Date: Fri, 21 Jan 2005 13:50:12 -0500
From: "Rich Peet" <>

> 
> 
> Clearly I am having trouble understanding and belief of why star would
> have a ten fold reduction or 20db over an equiv. shielded 2 wire.  And
> I appreciate your attempt as well as Walts in explaining it to me.

I think you are too wrapped up in the number. Think about Rycote 
windscreens, they give numbers for how much they will reduce wind noise. 
I doubt many pay attention to the exact numbers, but what they do know 
is those windscreens are very good at wind noise reduction. So they use 
them.

Same thing with star quad, I'm sure the number varies somewhat with the 
situation and just which brand of star quad. But the one thing it always 
does is give a very significant audible improvement in noise over 
twisted pair. Whatever the number, it's a great improvement. And in the 
case of star quad there is nothing else that is portable and practical 
and comes close. Easy choice to make.

> In further thought it makes no sense for me to buy the 2 wire version
> when I like the 4 wire because of possible breaks, and maybe even the
> "magic" that accounts for a noise reduction.

It's not magic, just some carefully thought out cable engineering.

Remember what I said about a broken wire in the cable. The impedance 
shift is more than enough to damage the sound you want. Always repair or 
replace a cable with a broken wire.

I've thought at times about buying a length of the Canare twin wire to 
compare, but it is money I'm sure would be wasted. I just ordered some 
more of the small diameter star quad in the "magic" blue color.

> Right now I am preparing a parabolic presentation for a large group of
> K to 12 science students.  I am sure they all will have fun and
> education with a group of 32" dishes and Randys math for a hands on
> learning experience.

Are you making these dishes? Do you have a mold?

Walt





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