> Mark asked,
>
> >I'm assuming that you didn't have any noticeable HF roll off at 50
> feet.
> >Any theoretical ideas on the cable length before HF roll off becomes
> >noticeable?
>
> Well, if I read my Shure Reactance Slide Rule correctly, with a
> source of 2K ohms, a -3dB rolloff at 20KHz would happen with a load
> of 4000pF or .004uF.
The fact that you would use a slide rule (albeit a cardboard one made
by shure) cements your status as a giant among techies.
> The miniature coax cable I'm using is probably about 30pF/ft. So the
> rolloff calculated above would happen at 133ft. I suspect I'm getting
> a measurable but not too significant rolloff at 50ft--probably less
> than the attenuation of a windscreen.
And I suspect that I shouldn't get too hung up on it. Besides, my
age-induced high end loss probably masks the roll off!
Thanks Dan.
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