From: John Woodgate
Subject: Re: audio line specifications
Date: Tue, 10 Dec 2002 06:36:36 +0000
Organization: JMWA Electronics Consultancy
Reply-To: John Woodgate
NNTP-Posting-Date: Tue, 10 Dec 2002 08:14:11 +0000 (UTC)
X-Newsreader: Turnpike (32) Version 4.01 <5Z8C9wtxbnpWyFnyfFzqmVF739>
I read in sci.electronics.design that Watson 'Atto Parsec' Name
wrote (in ) about 'audio line specifications', on Mon, 9 Dec 2002:
>Almost all consumer TRs used ceramic or crystal mics. And 15 or 20 feet
>of extension cable made a lot of difference on the high end of the mic's
Well, it's up to you to explain how capacitive loading on a capacitive
source can result in high-frequency attenuation.
>Later the companies started importing magnetic mics and I got
>something that sounded a lot more decent than the tinny ceramic or xtal
>mics. And I could put a longer extension cable on it without adverse
Ah, tinny! The resistive part of the load impedance was not high enough,
causing *low-frequency* loss. Cable capacitance, of course, reduces this
effect, in return for a general loss of sensitivity.
Regards, John Woodgate, OOO - Own Opinions Only. http://www.jmwa.demon.co.uk
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