2. analog
  3. 1254864364

Anti skate and tonearm damping query

I have read a number of threads relating to both antiskating and tonearm damping on the JMW 9" Sig.arm and find myself a bit confused.......I have been experimenting a little and have reached the conclusion that I must be deaf. I have not used the additional antiskating system, I have tried twisting and not twisting the leno wire and can hear no difference. If the Leno wire is not twisted therefore no antiskate, will this damage the stylus or the album??
I have also filled the damping well above the taper to the base of the point and still cannot hear 'the music being sucked out' or indeed, an improvement. Do I fill the well up to the point!! and then work backwards. Those that finetune using the damping seem to have some sort of epiphany when the 'sweet' spot is reached.

Can someone please shed light on how I should be going about setting the AS and finetuning the damping on the arm. The table is a scoutmaster with super platter and sds, the cartridge is the dynavector Te Kaitora Rua

Thanks
wes4390
perrew
299 posts
 
Mark, could you walk me through a real life example of Anti_Skate setup with your own arm and cart?
axelwahl
788 posts
 
Hi,
funny, talking with my 'learned friends' I find *experiment most ALWAYS precedes scientific explanation...* :-)

I just now proved to myself by simply sliding my SME V arm forward from its ~ 18mm overhang to some more without changing VTF = 1.25g and anti-skate 1 on the arm scale which keeps the arm in balance on the blank area of my test record.

Slide the arm enough forward (increase overhang) and ---- the skate force increase enough to now pull the arm to the centre.

Now let's consider a cart like my Windfeld with more then twice! the VTF (2.6g) and the result should be even more telling.

Greetings,
Axel
quiddity
119 posts
 
Perrew

Unfortunately I can't do that without revealing details of my tonearm's geometry which are not yet ready for publication.

Sorry.

Axelwahl

You have changed the offset angle (because the SME overhang adjustment works by moving the pivot not the cart)

Mark Kelly

perrew
299 posts
 
Mark, I understand you dont want to do that but could you desribe with some other tonearm?
Tks
Par
axelwahl
788 posts
 
Ok, move the SME arm forward you change the off-set angle yes.
Again, if you are running on the pin-point of the stylus, it has NO influence at all, at what angle that pin point rubs on smooth vinyl as a pin has no unequal sides --- unless that is only the case in my universe...

The change in friction force caused by a change in VTF of that pin-point is of course of MUCH greater influence and goes hand in hand higher VTF asking (all things being equal, which in the groove they are not...) for higher anti-skate compensation.

Also, the over-hang for a given arm is a ~ fixed parameter and as such it can actually be disregarded, fair enough.

There the variable is the VTF / friction force => stylus geometry.
As to the "off-set" it is the same as with the over-hang i.e. fixed also for any particular arm geometry and therefore also can be disregarded.

Axel
More to discover