I have a spreadsheet - originally developed by "luckydog" (who I have not seen online for some years) - into which you can plug the figures and extract an accurate effective mass calculation. - I have uploaded it within a ZIP...
It is a very useful tool.
You measure the mass of the end of the arm - without counterweight and with headshell removed, you then measure the weight of the headshell and of the counterweight - each seperately.
If you are seeking flexibility, you will build up a library of headshells (mass from 5.5g to over 20g) and counterweights (the counterweights are trickier to get / find, as you need to get "spares" designed for different arms/TT's where the tonearm tube diameter is the same as yours... I have about 3 counterweights that I use for such purposes...
It is a very useful tool.
You measure the mass of the end of the arm - without counterweight and with headshell removed, you then measure the weight of the headshell and of the counterweight - each seperately.
If you are seeking flexibility, you will build up a library of headshells (mass from 5.5g to over 20g) and counterweights (the counterweights are trickier to get / find, as you need to get "spares" designed for different arms/TT's where the tonearm tube diameter is the same as yours... I have about 3 counterweights that I use for such purposes...
