----- Original Message ----- 
From: "Jim Lux" <jimlux@earthlink.net>
>
>
>>I wonder... if you roll (the long way) copper strap you could put it 
>>inside
>>hose.  As long as the inside circumference of the hose was greater than 
>>the
>>width of the strap you wouldn't be forming a tube with the strap.  What if
>>you slit the copper tube before using it, would that be enough to allow 
>>both
>>the inside and outside to conduct high frequency current?
>
> There's no reason why you couldn't propagate current on the inside of the
> pipe without slitting it.  That's what happens in coax.
>
Not without a center conductor. Otherwise you'd have a waveguide
beyond cutoff.
Mike W4EF............................................
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