Hi JohnBrown,
I have had great experiences with a well implemented Baerwaald alignment as well. The distortion profile of the JMW did however catch my attention.
A note to owners of DV-507's and other unconventional mounts when implemented on a fixed mount plinth. Even though you may have a fixed mount, you can likely still achieve a Baerwaald alignment.
Your protractor of choice will guide you. In the case of an arc protractor, it will take some messing with the Ellison spreadsheet, because you need to derive a new effective length that is consistent with your pivot to spindle distance.
First, verify your pivot to spindle distance. Then, iteratively work through the Ellison spreadsheet to find an effective length that yields your (non-moveable) pivot to spindle distance.
Finally, verify that you can achieve this effective length - that you don't run out of fore/aft adjustability in your headshell slots. Use the method I propose above to determine the effective length.
Note that a difference of .5mm pivot to spindle distance will drive you nuts. As long as you can verify your pivot to spindle distance (or there's a enough play in the mount to compensate), you'll be fine.
Fun with geometry ;-)
Cheers,
Thom @ Galibier
I have had great experiences with a well implemented Baerwaald alignment as well. The distortion profile of the JMW did however catch my attention.
A note to owners of DV-507's and other unconventional mounts when implemented on a fixed mount plinth. Even though you may have a fixed mount, you can likely still achieve a Baerwaald alignment.
Your protractor of choice will guide you. In the case of an arc protractor, it will take some messing with the Ellison spreadsheet, because you need to derive a new effective length that is consistent with your pivot to spindle distance.
First, verify your pivot to spindle distance. Then, iteratively work through the Ellison spreadsheet to find an effective length that yields your (non-moveable) pivot to spindle distance.
Finally, verify that you can achieve this effective length - that you don't run out of fore/aft adjustability in your headshell slots. Use the method I propose above to determine the effective length.
Note that a difference of .5mm pivot to spindle distance will drive you nuts. As long as you can verify your pivot to spindle distance (or there's a enough play in the mount to compensate), you'll be fine.
Fun with geometry ;-)
Cheers,
Thom @ Galibier