Anyone try the replica B-60 Fidelity Research VTA?

The question is ''what is the optimal B-60 adjustments and what

are the variables''? The variables are the record thickness, the

bodies and cantilevers (angle) dimensions and the length of

the trench in the inside , moving part, of the construction. The

 trench determine max up and down movement of the arm.

The ''initial conditions'' to be established are parallel position of

the arm with stylus in the grove by recommended VTF. Easy to

establish with those small ''levels'' put on the headshell. By

positioning the arm in the B-60 halfway in the trench one get

the optimal position for up and down adjustment. For ''on the fly

adjustment'' one need, in my opinion , to remove the sticky

silicon oil and substitute for grease. Much more smooth movement

of the arm. This means no force is needed to move the round

adjuster. In order to get repeatable   results one need to use

test records. I try to get at least 60 microns pure by each of

my MC carts. If possible that is. Anyway 50 microns as minimum.

For masochist who like to adjust those variables by hearing there

is sufficient ''up an down'' space for their trial.

Dear Lew, I don't agree with you assertion that B-60 will work

as any other VTA adjuster.  The reason is dynamic function

of the FR-64. This means that both dynamic function as well

VTF adjustment are function of the same spring. I am not

mechanical engineer but don't believe that this spring will

work different depending from the ''up'' or ''down'' position

of the arm in relation to the record surface.

Chakster. I did not say concern, I said curiosity. I am curious and asked for information from someone reading on this thread with a B60. Surely with a slick accessory like the B60 it’s what, a 3-4 minute exercise, to give me a number.

The change in VTF associated with the typical minute adjustments to VTA/SRA is not worth worrying about. You can calculate it as a percentage change, if you know your geometry and vector algebra, but it will be tiny and not worth your concern, at least not to the degree that you appear to be concerned. Do you change VTA (or SRA) with every LP? I cannot be bothered.