Groove Tracer Black Delrin Platter

[watercourse]

Wow, lots of variables there: different tables, different arms. But I respect your opinion. Would like Frank to opine, given that he is using it on the same table as mine.
Also, would white Delrin be an option? That would look sharp against my all-black P5. But black on black would be super stealth, just better have some lights on the TT when I'm changing records.

[dakkon]

Why not make the main platter out of a piece of machined steel?

It would be easy to machine, and get to a perfect balance. While i am familiar with Delrin, as this is the choice material for many of the A arm suspension joints on race cars. Wouldn't you want something with a maximum amount of mass as the main table for speed stability, i am assuming this is at least part of the theory behind the value of the grovetracer subplatter? Or is there a fine line between "just enough" and "too much" as far as mass goes? The way the grovetracer sub-platter is designed, it looks like it is designed to provide a maximum amount of contact with the ball bearing, from the photos i have seen. It does not have a point but rather a concave tip that mates to the ball to increase surface contact and stability?, so the weight distribution to the bearing shouldn't be an issue, no?

Just wondering why carbon steel, or some other alloy isn't the more desirable solution, not trying to start anything, just wanting some knowledge.

Derlin is available in white, actually white is the color that is widely used on race cars, I would assume Frank could get some raw material in white?

[bacobits]

AudioSoul, please do report back on your Delrin Platter when it arrives.

[Alec124c41]

@ dakkon: Most steel is magnetic, and cartridges have magnets in them. These are small in MM cartridges, but the magnets in MC cartridges can be enough to flatten the suspension. This has been a problem with some older turntables, but I think there are a very few non-magnetic SS platters being made. Not cheap.

Cheers,
Alec

[Schu]

how about solid copper...

[dakkon]

alec, thank's for the explination... i guess as you can tell i didnt make the connection between the magnets in the cartrage and any residual magnatism in a plate of steel... high grade stainless would be the only option... and as you said, would be quite expensive...


Thank's again for the explination.

[Alec124c41]

how about solid copper...

That would be expensive, too. Have you seen the prices for copper mats?

Cheers,
Alec

[Torero]

This is very interesting. I would like to know if the Delrin platter is better than the Acrylic platter. I think that the Acrylic was a great upgrade over the glass platter although maybe would lost some PRAT .

Why nobody make a ceramic platter? Like a Rega P7 and P9 .

[AudioSoul]

This is very interesting. I would like to know if the Delrin platter is better than the Acrylic platter. I think that the Acrylic was a great upgrade over the glass platter although maybe would lost some PRAT .

Why nobody make a ceramic platter? Like a Rega P7 and P9 .

I have read that the cost of the ceramic platters for the Rega TT's are 3/4 the cost of the TT. It would be hard to make a aftermarket ceramic platter that would be cost effective.........

[bacobits]

I didn't know all this was available.
Ya wanna play ya gotta pay. $$$$$$
http://www.analogueseduction.net/produc ... er_rp7plat

Wood surrounds for the P5 also.

[Torero]

I don't think these platters can be used with Rega P3-24 o P5 because the P9/P7 subplatter is different.


I would like.

[bacobits]

Correct, I just didn't know all these parts can be purchased.
I think the P7-9 has a different bearing setup too. The height of that Sub-platter is larger too.

[AudioSoul]

I recieved my GT Delrin platter today. Frank sent it on Sat. and it arrived today Mon. It looks great, I have it mounted and one thing I didn't realize from the pictures is that it's a bit larger than a LP. I concider that good. I won't post any pictures as it looks just like the picture Frank posted. I am sick today so a musical evaluation will have to wait. I will post my impressions after I have some listening hours on it. I am excited.........

[AudioSoul]

I've been listening to my Groove Tracer reference sub-platter and Delrin platter on my P25 the last couple of days. My electronics are all Rogue Audio tube amps and preamps, my speakers are Decware DM945 monitors with a 8" bass driver running full range and a ribbon tweeter that is crossed over with a single capacitor. All I can say is WOW. It has been written that Delrin has simular impedence characteristics of vinyl that Acrylic doesn't have. I had the chance to play Ray Browns Soular Energy in std. thicknes vinyl and 180 gm. There was no difference in sound. The platter is an extension to the record so thickness doesn't matter. Wait a minuet, have I heard that before? One thing I noticed right off is that there was a certain sharpness to music using the stock platter I think that some mite think is dynamics. I dont think so! The music still has a lot of drive with out that sharpness. Music is pretty well balanced top to bottom. All instruments are in there naturall place and sound natural without any glare. If anyone has any questions about this combo I will be glad to answer......