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Re: Phono Recording

Subject: Re: Phono Recording
From: "Michael Dalton" mdaltonarielle
Date: Tue Nov 6, 2007 4:19 am ((PST))
  Re: Phono cartridge recording 
   
  Some thoughts about phono recording: this is a clever way to employ a compact 
transducer with an extremely small contact surface to sense vibrations along a 
surface. The system has good gain provided by the phono amplifier, usually in 
the range of 40-60 dB. As a recordist, the user has a signal that can be 
employed for any number of purposes. If is used to compare A with B, that can 
be directly measured. However, if the actual vibration/sound spectrum is 
important, the output from the amplifier has to be linearized by passing in 
through an inverse RIAA network. Circuit configurations for the components for 
such circuits can be found in many audio and instrumentation handbooks.
   
  I used the inverse networks in my audio business to check the acuracy of the 
phono amplifiers in preamplifiers and receivers. Most products were fairly 
close because the RIAA standard is clearly defined.
   
  Mike
   
  Author of the forthcoming book: Another Kind of Mind: A Talking Bird Masters 
English
   








"While a picture is worth a thousand words, a 
sound is worth a thousand pictures." R. Murray Schafer via Bernie Krause


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