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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