Conference hips::uk_audioo

BTW, should have added that if your cartridge is heavy, or your mounting
bolts are heavy, you may not be able to move the lighter weight far enough
back to balance.

Consider using alloy bolts/nuts or a lighter cartridge if you have this
problem.

    An even better tweek...
    
    The Ittok counterweight should be as close to the pivot as possible�
    Howerver, as you say, the _early_ two piece counterweight sounds better
    with the 2nd ring removed. Linn realised this and brought out a new
    counterweight� just prior to the LV III. There are available from our
    Glaswegian (?sp) friends for a nominal fee...
    
    	Rik -owner-of-2-Ittik's-in-his-time Watson
    
    
    �There is a good mechanical reason for this related to moments on
    inertia which I can't remember for the life of me.
    
    �Can't remember if it's a single piece or an improved 2 peice design.

As the current owner of Rik's last Ittock (LV II), I can say that the 
counterweight is a single piece 

Dave

    Another couple of Ittok tweeks given to me were to remove the arm rest
    from the armboard, and to remove the cueing mechanism. I was told the
    results would be amazing. Unfortunately the arm then has to parked
    dangling over the rh side of the lidless plinth; as I was using an
    Asaka at the time, I decided my nerves wouldn't stand it and never did 
    the tweeks.
    
    Another is to set the tracking weight to zero, on the rotating scale,
    then set to the correct pressure with a set of scales by moving the
    counterweight closer. The theory is that the counterweight then exerts
    a smaller moment on the system, which means the stylus has to exert
    less moment at the other end to track the arm.
    
    None of these makes an Ittok an Ekos, though, the first ones falling
    into the range of "stupid and dangerous things to do with your LP12".
    
    Dave 

    
>    Another is to set the tracking weight to zero, on the rotating scale,
>    then set to the correct pressure with a set of scales by moving the
>    counterweight closer. The theory is that the counterweight then exerts
>    a smaller moment on the system, which means the stylus has to exert
>    less moment at the other end to track the arm.
    
I've done this (great minds run along the same grooves?) but can't say it
was successful.

I don't know about this "smaller momement of inertia thing".  I would have
thought the further the counterweight was from the pivot point, the
more "immovable" the arm would be (assuming infinite rigidity), but then
I don't claim to know a thing about physics or mechanical engineering.

re my .5

My belief that the weight should be as far away from the pivot as possible
leads me to set my Ittok LVII like this:

1) Set spring tracking weight to 1 gram.
2) Balance the tonearm moving the weight back/forth
3) Turn on the spring to, e.g., 2.5 grams to get 1.5 real grams

I like it!

Now, what's wrong with my reasoning here?  I've never really understood
this moment of inertia stuff.  Can someone explain it simply/directly??

Thanks.  Brent.

    Moment of interia for laymen.
    
    Tak a broom by the handle and swing it about by the handle - notice how
    difficult it is to stop it moving - it has a high moment of inertia
    because the main weigh of the broom (the head) is relativly far away
    from the pivot point (you hand).
    
    Now repeat the above excercise whilst holding the broom by the head and
    swinging the handle about.
    
    Next -and don't try this at home- replace the whole lot by your Ittok
    and see why you poor old Asak is having such a hard time of it.
    
                                            |E
    	=M===x==============================|E
         |                                  |E
    
         ^   ^                              ^
       Hand  Pivot point (imaginary)       Broom head
    
    
                                            N
       ======================x==============N==
       V                                    N
    	
       ^                     ^              ^
       Asak               bearing       counter weight
    
    The closer 'N' is the 'x' the easier the Asak can move the whole
    assembly.
             

|                                            N
|       ======================x==============N==
|       V                                    N
|    	
|       ^                     ^              ^
|       Asak               bearing       counter weight
|    
|    The closer 'N' is the 'x' the easier the Asak can move the whole
|    assembly.
             
I think I follow what you've said, but I thought the whole point of the
exercise was for the cartridge NOT to move the "whole assembly".  ??
(Except at very low frequencies to comply with record warp...)

Still puzzled...