PTP6 - Lenco Permali Plinth

[wenig watt]

You've seen the Panzerholz analysis. Why do you want to relativise these properties by combining much worse materials?
If you screw through a permali block, the effect of the material is relativised by a short-circuit path.
For the tonearm block, the choice of material is a matter of taste.
Uniform damping with permali or more or less pronounced resonances of any material. You could experiment with this.

With best regards

Arndt

[wenig watt]

 
I would say mainly because of the look. If you have taken the trouble to measure the resonance behaviour of the combinations, you may come up with something useful. But if you are essentially aiming for a good result without long tests, you are on the right track with Panzerholz that is not too thick. 20-25 mm have the best effect.
That's why at some point I started using several pieces of different lengths and widths. This way I achieve better damping in the low frequencies. Strictly speaking, and if I had the time and the means, I would have to specifically combat the motor resonances.

With best regards

Arndt

[analogadikt]

, you are on the right track with Panzerholz that is not too thick. 20-25 mm have the best effect.

Arndt

He is using Permali. No Panzerholz here

Regards,

Anwesh
 

[analogadikt]

Hi Vakman,

Someone who did a lot of material testing for damping purposes suggested the 25 mm Permali / Pholz to be the optimum thickness and combination sandwiches were not required.

If you want different materials then I would suggest that you make the armboard out of corien. In fact make a bolting system that shall enable you to swap in armboards made of different materials and some sandwich construction.

Regards,

Anwesh

[wenig watt]

He is using Permali. No Panzerholz here

Regards,

Anwesh
 

Sorry Anwesh,
I always assume that this is approximately comparable in its properties. Would you recommend a different thickness?
I have just measured my Presto with the measuring mic on the component. The 25, 50, 100, 200 Hz vibration is clearly measurable on the motor, but hardly noticeable on the plinth.
Next time I have time and money I will get better equipment.

With best regards

Arndt

[analogadikt]

Sorry Anwesh,
I always assume that this is approximately comparable in its properties. Would you recommend a different thickness?

Arndt

No need to say sorry Arndt , I mentioned it to maintain the correctness. IMO 25 mm is optimum, I vaguely remember Mr. B also saying something like that. My own project also used 25 mm Permawood, a slightly less dense variety of Permali. But then I have the higest grade Permali platter ring , stacking platter and armboard.
https://www.lencoheaven.net/forum/index.php?topic=37740.msg513020#msg513020

I shall discuss the testing with you via PM. It would be very much OT here.

Regards,

Anwesh