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In Reply to: John, I can perfectly align the Kenwood tonearm on the two grids posted by alaskahiatt on October 14, 2017 at 16:06:52:
> Two Baerwald protractors, and only one works. Doesn't make sense to me.
I guess I don't understand why you are so insistent that one protractor works when we both know that can't possibly be true. It should be obvious to you that you are incorrectly aligning the cartridge with the protractor that you believe works properly. Either that or the protractor does not have null-points of 66-mm and 120.9-mm! You can't have it both ways. It's mathematically and geometrically impossible for a tonearm with effective length of 215-mm and overhang of 9.5-mm to have null-points of 66-mm and 120.9-mm. Do you doubt the math?
This is actually a good learning experience for you. It demonstrates how easy it is to incorrectly align a phono cartridge with a so called "dumb" two-point protractor and why you need either a sight-line or an arc to do the job properly. Personally, I believe that arc protractors are the most reliable and least fallible of all types of protractors.
Good luck,
John Elison
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Follow Ups
- RE: John, I can perfectly align the Kenwood tonearm on the two grids - John Elison 10/14/1716:53:23 10/14/17 (12)
- I totally believe the math. What I have learned is that I cannot convey - alaskahiatt 20:43:53 10/14/17 (11)
- RE: I totally believe the math. What I have learned is that I cannot convey - John Elison 22:08:18 10/15/17 (10)
- John, most of the time I just use the Geo-Disc for alignment. - alaskahiatt 00:32:29 10/16/17 (9)
- John, I did make one mistake here. When I said rotate the protractor counterclockwise - alaskahiatt 14:33:43 10/20/17 (6)
- RE: John, I did make one mistake here. When I said rotate the protractor counterclockwise - John Elison 18:58:34 10/22/17 (5)
- When you say, "The same exact null-points can be used for any length tonearm," - alaskahiatt 20:40:34 10/22/17 (4)
- RE: When you say, "The same exact null-points can be used for any length tonearm," - John Elison 22:05:19 10/22/17 (3)
- I agree with your statements with restrictions. - alaskahiatt 23:00:13 10/22/17 (2)
- RE: I agree with your statements with restrictions. - John Elison 08:55:31 10/23/17 (1)
- Those null points are crazy. Since the product of the Kenwood points - alaskahiatt 11:29:26 10/23/17 (0)
- RE: John, most of the time I just use the Geo-Disc for alignment. - John Elison 09:51:42 10/16/17 (1)
- We are almost there John when you say "moving the stylus closer the - alaskahiatt 10:25:20 10/16/17 (0)