[Dick Pierce[_2_]]

Arny Krueger wrote:
Ideally, the counterweight is also suspended in such
a way that it becomes a vibration absorber tuned to
the resonance frequency of the arm.

Sorry, doesn't work. What such a sceme ends up
doing is turning a second order resonant system
into a 4th order resonant system, and unless you
get ALL of the parameters right: cantilever
compliance, arm mass, counterweight suspension
compliance, counterweight mass, canitlever and
pivot losses, counterweight suspension losses,
it's more likely you'll end up with a WORSE
performance than a better one. It's a problem
that, physically, is completely analogous to
a vented box speaker system, and your suggestion
is reminicent of people taking a sealed box speaker,
punching a hole and sticking a port in and assuming
the result can only be better. It can only be better
if you START with a proper system design to begin
with: this fact is as true for your tone arm scheme
as it is for a loudspeaker system.


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+ Dick Pierce |
+ Professional Audio Development |
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