Mike New platter, Oyaide MJ-12 mat & STB-MS stabiliser arrive at Marco Towers...

[Reid Malenfant]

Agreed Marco Once the natural resonance modes of an alloy platter such as the Techie one have been taken under control i'd agree with you

The thing is though is to damp out the standard platters resonant modes & two metals that are vastly different in stiffness appear to do this nicely. The soft copper prevents or should i say seriously reduces the ringing of the standard Techie platter (because it's so soft & has a decent mass) so you hear the music better with less of the TT being evident.

Like i say, some kind or weird sandwich - but one that does what is needed

[Spectral Morn]

Centre hole 7mm, total distance across is 286mm.

The copper mat will need to be 100% flat.


Regards D S D L

[Marco]

The thing is though is to damp out the standard platters resonant modes & two metals that are vastly different in stiffness appear to do this nicely. The soft copper prevents or should i say seriously reduces the ringing of the standard Techie platter (because it's so soft & has a decent mass) so you hear the music better with less of the TT being evident.

Like i say, some kind or weird sandwich - but one that does what is needed

Yup, Mark, that's precisely why I had Mike anneal the copper plate/mat onto my version of his platter

The same 'sandwiching' principles also apply in the design of turntable plinths, which I suspect will be the final modification to the Techie, and something I believe Mike has been working on

Marco.

[MCRU]

It won't be hard to place it under a dead weight to flatten it out. I will see what thicknesses are available tomorrow.

[MartinT]

Marco - did I miss something or did you try the Achromat on top of your bonded platter? What was the result?

[Marco]

No, mate, you didn't miss anything, as I haven't mentioned it.

Unfortunately the Achromat wasn't a good match with the bonded copper mat on the MN platter, mainly because the Achromat is rigid and somewhat slippery, and so skids around the place like a DJ slip mat, with the resulting sonic consequences!

Obviously though, you're not finding this a problem with the standard MN platter

Marco.

[markf]

I can't help thinking what would be the effect if you put a flexi disc on the Oyaide mat ,
the holes underneath the record might make certain areas under the thin disc act like a drum skin,
I would assume the effect becomes less as the record gets thicker.

[Mike_New]

I'm just wondering how a bonded sheet of lead (Pb) would work in this situation. It'd be softer than annealed copper & damping wise it'd be far better. Or maybe just a lead mat might be pretty good, just don't go trying to eat it

Maybe i'm a bit crazy so forgive me, but it's something i'd be willing to try on my deck. It's not a Techie though

The thought had occured to me, but there are not any church's in my area!!!

Mike

[Mike_New]

I can't help thinking what would be the effect if you put a flexi disc on the Oyaide mat ,
the holes underneath the record might make certain areas under the thin disc act like a drum skin,
I would assume the effect becomes less as the record gets thicker.

You are essentially on the right track in your thinking Mark.
Attempting to use a thin copper sheet is going to be an exercise in trivia, to the extent that if you are going to use a copper mat then you should be prepared to do so in a sensible way and use the excellent copper mats that are now available and which measure 3 or more mm in thickness. They do the job properly as they were designed to do.
The Standard Techi platter is somewaht dished, and a thin copper foil is just going to flutter like a diaphram if it is put ander the Oyeida.
Secondly this thin sheet cannot be anealed easily, so what are we gaining here??

[markf]

I was literally thinking of a flexi disc record, actually playing one directly on top of the Oyaide mat