tone arm with 10gr mass with 15 gram weight cartridge?

I've used carts with 12-16g mass (16+ grams for Benz LPS) on my 9.5g EM Clearaudio tracer arm.  I just had to use the additional counterweight.  It sounded great, tracked well, and the resonance frequency as measured by the HiFi News test record was a hair over 7hz.  A bit low but turned out fine.

um = micron = one millionth of a meter.

if that was the question.

You can practice on the calculation chart that @yugiboy has posted.

With a well tempered you have variable damping to play with too, the raw resonance calculated for an undamped arm using the common formula won’t be the whole story.

http:// korfaudio.com/blog70

ok thanks everyone, i'll try to do my homework.