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In Reply to: Re: Stylus Shape: Spherical vs Elliptical? posted by John Elison on September 16, 2006 at 16:28:57:
SirAnthony,Rake angle applies when the contact area is taller than wide, and therefore represents a sort of line on the wall. The contact area runs up and down each 45 degree wall, but will appear almost vertical when viewed from the side. The deviation from vertical is the rake angle. Records must be cut with the stylus at an angle, so the SRA is usually around 18-22 degrees.
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As per IEC98-1987(11.3.3 Stylus Rake for non-spherical tips):The stylus rake in the direction of groove travel shall lie between +4 and -8degrees when playing at the tracking force recommended by the manufacturer. (Ideally -2 degrees.)
No, SRA is between 3-degrees and 6-degrees from vertical. It is raked back so as to eject the lacquer cuttings during the recording process.
Ah, then I'll look into this further. There's so much conflicting information out there.
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