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I0OJJ > ANTENN 03.07.10 19:33l 32 Lines 1032 Bytes #-5794 (0) @ WW
BID : 44204I0OJJ
Read: GUEST
Subj: Re: coax short supply
Path: DB0FHN<DB0MRW<DB0ERF<OK0NHD<SR1BSZ<ON4HU<DB0RES<IK2XDE<IR2UBX<IW2OHX<
I4UKI<I0OJJ
Sent: 100703/1606z @:I0OJJ.ILAZ.ITA.EU #:6740 $:44204i0ojj
On Jul 3, 10:11=A0am, "Ralph Mowery" <rmowery28...@earthlink.net> wrote:
> "Ian Jackson" <ianREMOVETHISjack...@g3ohx.demon.co.uk> wrote in message
>
> news:qJc2oaSYvwLMFw3u@g3ohx.demon.co.uk...
>
> >> But, when the coax is stretched, what happens to the characteristic
> > impedance and the loss? [This is a (sort of) serious question!]
> > --
> > Ian
>
> If the ratio of the conductors stay the same, there should not be a chang=
e
> except the losses go up. =A0As you streach the coax, the shield and the c=
enter
> conductor will get smaller. =A0Also the dialectric will have to get small=
er.
> If they do not srink at the same ratio, the impedance will change dependi=
ng
> on which conductor gets smaller the fastest.
>
> The losses will go up because the center conductor and the outer conducto=
r
> are smaller. =A0This is the simple IR loss of the conductors. =A0It is th=
e same
> as going from a rg-8 to a rg-58 type coax.
I'd be pleased to trade two buckets of prop wash for a coax stretcher.
Any takers?
Walt, W2DU
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