Inner Platter Damping - TD160S

[clubsport911]

Got an idea...

I'm considering filling the inner platter / hub up with wax to add damping.

So, armed withy a few coppers, I bought a load of old candles and was considering to simply cover the keyhole slots, melt the wax, and then pour into the up-ended inner hub until it reaches a level.

Of course, I would make sure that the hub is level first, to avoid any out of balance situation once the wax is in.

Once it has cooled, the material would certainly add stability and mass (in case I moved to a lighter TT mat) and also kill of any resonance.

Anyone see any holes in my sunday afternoon theory ?

Thanks !

[bogle111]

Hi clubsport911

What mat do you use?

Personally I would damp the plinth more with bitumen layers before attacking the platter.

Regards
Pete

[cats squirrel]

although candle wax has a resonable damping fector, about 0.27, you would have to add 8-10 times the mass of the inner platter to approach this figure.

Why do you want to do it? Has any person (who lives on this planet) says its necessary?

[clubsport911]

@ bogle111

I use 515gm Nad Mat which dates from the early 90's. I've put a post elsewhere to look at newer options to ensure I get the best from my TT... The Plinth is already heavily damped, but the only reason I'd fill the hub with anything is because it sings like a bell (without the outer platter of course).

Just experimenting !

[clubsport911]

@ cats squirrel

"Has any person (who lives on this planet) says its necessary?"

Nice one.

No... just experimentation sunday... I'm sure however that someone I read about an owner who filled the hub with white decorators caulk. I thought of that as well, but couldn't think of a way to get it nice and smooth / level.

Also, I have definately seen a piccie on a forum of the inner platter filled with cork. Now to my mind, that cannot be as good as wax - it's density is far lower.

Let's put it this way. Why would you design an inner platter that sung like a bell and is hollow, apart from manufacturing and cost reasons. You wouldn't.

I'm still tempted and indeed as I might be the first on the planet to do so, could even be a trend setter !

[voxbox33]

Hello , here's my two cents worth ... Go to a CAR AUTO SHOP or on Ebay and look for this spray :

050220 Boom Mat Spray-On Sound Deadening Vibration Damping 18oz Undercoating

Boom Mat Spray-On is perfect for those hard to reach places such as trunk interiors, fender wells, undercarriage, body panels, rear quarters and inside door panels to name a few. In addition to reducing noise, vibration and serving as an undercoating, Boom Mat Spray-On also serves as a thermal barrier insulating against heat.

Hope this help .

[Alec124c41]

Joel/Violette made a hardboard disc that was a tight fit in the inner platter for this purpose.

Cheers,
Alec

[rkay5]

Joel/Violette made a hardboard disc that was a tight fit in the inner platter for this purpose.

Cheers,
Alec

Hi,
I used this in both my TD150 and TD166mkII and I feel that hardboard(MDF) disc work well and add to the SQ

[G Doggett]

I cut a circle from Dynamat to fit inside the sub platter on my TD160. This seems to work fine. However the mat does a fine job of damping both the sub and main platter.
Graham.

[vincitsemper]

Getting the wax to be level will be a pain, it will dry as you are trying to level it.

Also, how much will it weigh and how stable will it be? With the addition of a heavy mat you may end up having issues with the suspension.

I have a Plattermatter on my TD160 Super, that is enough to mess up the speed change. Without adjustment it now refuses to play 45s.

Dynamat is easier and definitely less messy, a CNCd plywood or acrylic disc stuck on the underside of both platters could also be an idea.

Sundays strokes of genius are dangerous!

Cheers,

Victor.

[Bob in STL]

I recently sent a note to Joel/Violette inquiring about the hardboard insert. He no longer makes the hardboard insert and it appears that he does not recommend them.

At some point I will try dynamat since it is also recommended for damping the underside of the chassis and the sub chassis.

To my ears, a better alternative to the original platter mat is a DIY cork mat.

Even more sound improvement can be realized by replacing the bottom board with a nice snug board made with 1/2 plywood or MDF. I used cabinet grade birch plywood for mine.

Cheers, Bob