From: Watson 'Atto Parsec' Name
Subject: Re: audio line specifications
References: <3DEE2757.EE79B063@crf.canon.fr> <3DEFD744.3A2D8C8D@gv.net>
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Date: Mon, 9 Dec 2002 19:29:40 -0800
NNTP-Posting-Date: Mon, 09 Dec 2002 20:35:25 PST
Organization: InReach Internet
In article ,
> In article ,
> email@example.com mentioned...
> > I read in sci.electronics.design that Watson 'Atto Parsec' Name
> > wrote (in > ach.net>) about 'audio line specifications', on Fri, 6 Dec 2002:
> > >Well, I said high impedane, which is the vector sum of the resistance
> > >and reactance. If it's high impedance then the capacitance must be very
> > >low.
> > 200 to 1000 pF typically.
> > >In any case, I could hear the diff between a short cable and a
> > >long cable as far as high end rolloff goes, with the cheap crystal
> > >mikes, or were they ceramic, I forget which.
> > Ceramics tended to be nearer 1000 pF. What you heard might be loss due
> > to the *loss resistance*, not capacitance, of the PVC insulated cable.
> > For crystal microphones, use polythene-insulated cable.
> Hey, look. This was back in the toob (aka valve) days, when the tape
> recorder's microphone was a box the size of a carton of cigarettes, and
Correction. I should have said pack of cigarettes.
> the microphone cables were covered with cloth braid. I don't even think
> they had an idea of using PVC, the dielectric was probably rubber.
> Back in those days, every budding audiophile like myself had their heart
> set on getting a Shure or ElectroVoice cardioid microphone, so they
> could make a decent sounding recording. But those were way out of my
> budget. I couldn'e even afford the matching transformer.
My email address is whitelisted. *All* email sent to it
goes directly to the trash unless you put NOSPAM in the
Subject: line. alondra101 hotmail.com
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