Uni-Protractor Set tonearm alignment

Dear John,

Thanks for your response, I appreciates.

Hi John_Gordon, like it what you you said: we can`t just sweep it under the mat... this is also the case regarding precision! we don`t like to listen under the mat and you don`t do it too.

Best & Fun Only - Thuchan

Dear Mesal, John stated (04-11-11) 'It would be possible to
to design a cam system given different leverages so as better to follow the average variation...' Well this was
the Sony solution as I mentioned before. One get the impression that the issue is rather avoided then solved by
adding more(confusing) variables. But looking to the actual constructions of the antiskate mechanism one can conclude that not much thought is implemented. And those are all mechanical issues that can be measured as well as covered by Newton. Or so I thought.
Regards,
Regards,

Jazzgene
you said

The thing is if the anti-skate force differs from the beginning to the end of an LP, how can a constant weight compensation like the VPI weight on a string work correctly on the entire LP? It can't, I would think.

If your antiskate is the JMW 9 then the force will increase as the arm moves towards the centre if the little arm with the weight is horizontal when the arm reaches the run out. if it is literally a weight on a string, like the old SME, it can aso be set to apply an increasing or reducing force depending on the angle it makes with the arm, though this doesn't apply if the string run round the diameter of the pillar and the radius it is acting at doesn't change.

Check the output wire and make sure it is not counteracting or adding to the antiskate. You can use headphones and a test record to check for distortion on one channel more than the other. If it distorts on the right, you need more antiskate.If the left, less. If it still distorts on the left with no antiskate, the wire is pulling outwards.

Using a greater VTF stops the distortion by nailing the stylus in the groove, but it also increases the skating force because friction is proportional to VTF. If this was not so, our cars would go faster as the braking force increased...

Thuchan

I often sweep things under the mat.... Most people probably do too. Especially the hard things, like precision in areas where it is hard to be accurate or measure reliably - antiskate is one, and, for me, setting cartridge offset is another.

I was playing with an angle protractor this evening and trying to see how repeatably I could measure an angle. Where it was possible to physically set the protractor against both objects it was easy, but by eye maybe within 0.5 degrees.... that is one place we need precision.