There is a sure fire way to find out if your cart & arm match and that is to measure their resonant frequency. which is not difficult.
The down side obviously is that you need to obtain/borrow the cart in question or buy it. Such is the wonderful merry-go-round of this hobby.
I have had a Denon 103D playing in a high mass arm 12'' - 28 grams for several weeks. Did it sound horrible, NO it sounded pretty good, Would it sound better in an arm with the correct Eff Mass. Doubt it unless you are prepared to pay around $8,000 for one.
Don't sweet the small stuff, just enjoy the sound
Cheers
The down side obviously is that you need to obtain/borrow the cart in question or buy it. Such is the wonderful merry-go-round of this hobby.
I have had a Denon 103D playing in a high mass arm 12'' - 28 grams for several weeks. Did it sound horrible, NO it sounded pretty good, Would it sound better in an arm with the correct Eff Mass. Doubt it unless you are prepared to pay around $8,000 for one.
Don't sweet the small stuff, just enjoy the sound
Cheers
OK, but why did you increase the effective mass to 35g then?
And how do you know the effective mass is now 35g? - if the two daubs of Blue-tac have a combined mass of 7g, you're forgetting the additional counterweight.
Here, an estimate (don't know the daubs' and counterweight's mass, nor their distance from pivot/stylus tip)...let's say the daubs are 7g just above the stylus/at the effective lenght (304,8mm). Let's guess by the photo that the extra counterweight sits at 40mm from the pivot.
To counteract the increase of VTF from 2,1 to 9,1"g", the extra counterweight's mass is:
7g x 304,8mm = m x 40mm
m = (7g x 304,8mm) / 40mm
m = 53,34g
The extra counterweight's mass increases tonearm's mass moment of inertia (let's neglect its propreitary) by: 53,34g x (40mm)^2 = 85.344gmm^2
The effective mass is the mass, at the tip of the stylus (effective lenght), that exhibits the same mass moment of inertia as the whole tonearm-shebbang does.
So, the extra counterweight adds to tonearm's effective mass by: 85.344gmm^2 / (304,8mm)^2 = 0,92 gram
This is not very much, but it's still present nevertheless.
Actually...what you did is a smart and easy way to increase effective mass - lowering it, is more of a challenge. This is a principle known and implemented many moons ago, but also currently...not very common, though.
https://snvinyl.co.uk/WebRoot/Daily...ED4/0A0C/05BE/8900/9VertereSuperGrooveTA2.jpg
Hi,
Cheers
- No I did not forget about the C/W, but of course had to move it backwards & add a small additional weight that I have.
- Yes it does.
- Nice arm, uses the Hadcock design inversed.
Cheers