Resonant Frequency

Found the download button.....got it, thanks!

I have tried a little bit of tweaking with Blu-Tac on top of the cartridge on my Ariston arm.Some possible improvement in sound-staging ocurred, but is this the right place to put it.Anyway I was only estimating the arm's effective mass at 23g giving about 9hz resonance.Is this correct? That is the figure Jelco gave me for their "curved" 250 arm and I am using the straight arm which looks very similar.Also I would like to know if you can stay with the recommended tracking-force or play it by ear to start?stefanl

I probably misinterpreted what I was aiming for in the last post,but I thought some added weight might be interesting.I think the straight Jelco arm is possibly much lighter than its "curved" cousin.I would really like to know its effective weight.The experiment failed as it was really too "bassy".What would a Graham 2.2 arm with a Koetsu Urishi mounted in a Linn Sondek sound like?Stefanl

23 g for the arm plus 2 g for the bolting plus 6 g for the cartridge makes a total effective mass of 31 g. When you plan to reach this 9 Hz, what dynamic compliance did you enter in the calculations? Can you supply some fixed points on this?

The information for this arm is sparse.I got one line from Jelco saying their new arm was 23 g.That was it.Last time they said they had no records left of the straight arm they produced 20 years ago for the Ariston Q Deck.It was the same arm on the Revolver Rebel and a couple of others about 10 years ago.Someone said they still OEM a straight arm but I haven't seen it.The cartridge is 7g with a rated compliance if 10.If it gets any heavier it is bad,but I figure the straight arm is a few g's lighter.How much? Stefanl