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Two senses of "VTA"

Posted by Helge Gundersen (A) on October 1, 2007 at 12:37:51

In Reply to: RE: Explain VTA? posted by John Elison on September 30, 2007 at 09:39:49:

Actually, this sketch illustrates the different meanings of "VTA".

What's called VTA in this sketch, is the common "cause" of the stylus rake angle (SRA) and what's called the vertical modulation arc here: Change the angle of the arm relative to the record surface, and both the angle of the stylus itself (SRA) and the angle of the movement of the stylus will change -- VTA as the name of the whole vertical-angle thing.

The vertical modulation arc is VTA as opposed to SRA.

In both horizontal alignment, azimuth alignment and vertical alignment we can distinguish between the stylus angle and some kind of movement angle, the latter apparently the most important point of horizonal and azimuth alignment, whereas both SRA and VTA (in the narrow sense) are often discussed in the vertical alignment.

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