How to measure tonearm effective mass

Dgarretson

Thanks for the clarification. Now that you mention it I saw a phot of your mod to the Terminator (on VA?) and thought it was a very clever solution.

Mark Kelly

Dan_ed, Good point about the tonearms that can accommodate two counter-wts, but as Dave mentioned, the range of adjustment of effective mass afforded by that arrangement would seem to be quite limited.

Mark, Despite the setback you described, do you continue to pursue a Dynavector-like tonearm design where the vertical effective mass could be adjusted? I wonder whether your final solution to that problem would be retro-fittable to my DV505, eventually. Actually, what I do now is just change headshells as and when needed to change EM. That obvious ploy does not allow "on the fly" adjustment to max out the performance of a given cartridge, however.

Lewm

I have no intention of making any of this available commercially. It's slowly dawning on me that whatever ability I have as a designer, it's more than compensated by my lack of ability as a business person.

Yes, thanks Lewm. I should have added, "adjusted to some degree", or some such. ;-)

Hi Mark,

I've been following this topic (motor controller) for a while now. There's obviously a great deal of interest from a growing number of turntable owners in finding a better way to extract the most music from their equipment. Is there any plan to share your design with a wider community by making it available to the DIYers in some fashion?
Cheers,
~james