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Re: Shure V15VxMR Intermodulation Distortion Measurements

Posted by pickle (A) on May 24, 2004 at 16:01:35

In Reply to: Shure V15VxMR Intermodulation Distortion Measurements posted by John Elison on May 24, 2004 at 10:20:46:

John,
I did warn you that the IM distortion would require you to be sitting when you saw the results for vertical modulation. (This was a while back so I don't expect you will remember). All is not lost however. The IM is greatly affected by the dynamic tracking angle of the cartridge. Also, does your test record STR 112 tell what the effective vertical modulation angle of the record is? (The cutter VTA is only a component of that figure.)
Anyway, by my measurements the VTA of the xMR is 28 degrees, give or take. So if the record is 15 degrees (say) then gross IM is to be expected.
I am still trying hard to get my charts to appear correctly in a posting. When I do we can exchange our xMR results! And then there is the ELP LT to be explored.
Keep up the good work and good listening, IM and all!
Bill

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