MY TT build

[3GGG]

Hi All

Thought i would post some pics of my TT build.
The base is 80mm South Australian slate. The platter is 75mm acrylic i got spun up at a near by engineers shop, $$$$!
The bearing is a teres bearing and tone arm is origin live, fully modded.

Ill post some details on the AC sync motor control later.

Now waiting on another piece of slate to house motor and speed control.

 

[Simon1972]

Nice work, buy some dusters... ;-)

 

[moray james]

Beautiful! Thanks for posting pictures of your inspiring work.

 

[eldarvanyar]

Stunning Turntable, where did you get the acrylic platter from and the motor etc?

 

[3GGG]

Thanks for the kind words. It is alond way off the final dusting and polish

The acrylic was purchased as a block then custom machined. The engineer shop spent 6 hours machining and polishing. The guy was great to deal with and gave me a good price considering the work envolved.

The slate is from Mintaro slate in South Australia. Nice quality stone with no defects in it. Motor is an AC sync motor from ebay. Ill posy some pics of the speed control when its finally built. It is going to be housed in a seperate stone housing that sits neatly along side the TT. My brother is an elec engineer and has programmed some chip to produce the two offset frequencies. Then i used two LM 3886 boards from chipamp.com to amplify the signal. With rthe push of a button i can adjust frequencuy and voltage. Sorry i dont know the fine details, all this DIy electrical is newto me.

 

[cjcc67]

nice work you must be happy with it

 

[prestonchipfryer]

A truly magnificent piece of work, well done

 

[kach22i]

Nice table you built.

I did not know that you could still get the bearing from Teres.

 

[3GGG]

I know they have stopped producing them and what is left is all there will be.

Thanks for the kind words.

 

[3GGG]

The TT is pretty much complete. I just need to finalised the wheel for the motor.
The platter spins beautifully with either a fine thread of cotton or with the rim drive using an O-ring. unfortunately it will be a little while until i can do a comparison. Whensetting it up for the first time I managed to brush my hand against the DL103R and snap the entire stylus off!!

The speed control works beautifully and is housed below the motor on the slate motor/speed control housing. The platter get up to full speed within a few seconds, then reduces its voltage output for a smooth ride.

I need to get a hurry on with the HPS 5.1, then maybe some horn speakers🙂

 

[a.wayne]

Wow beautiful 😱......... truly !!!


Question ? Why an acrylic platter , what are the advantages ?

 

[wjlamp]

Wow beautiful 😱......... truly !!!


Question ? Why an acrylic platter , what are the advantages ?

Because acrylic,has a similar sound character to the vinyl,compared to various metals used for platters.That means, that the mechanical energy generated by the stylus pressure in the grooves of a disc, is absorbed by the platter,and doesn't reflect back to the disc and the stylus. Other materials like rubber,felt,glass,cork,etc,have differing acoustic impedances to the vinyl,and are frequency selective.As you know everything has its own resonance.Acrylic seems to be more linear than the others for that use.
You can easily hear it by substituting platter mats,on a record player.
However,which is best,is in the ear of the beholder.

B.L

 

[3GGG]

And it looks cool!

 

[Salas]

There is a vinyl disc mat, which is actually a record with no grooves and a suppressed label area so the LP snuggles better when wresting on it. A mate has it, argues it was his best. Even tried drummer's 12 inch practice silencers. In my case a classic carbon anti static mat proved nicely non detectable. Our platters are dense organic but not acrylic.

 

[SGregory]

I agree it certainly looks cool. The diy tables being built are inspiring, including yours. Great work, I bet it sounds great. What are your perceptions/opinions so far in that regard.

 

[3GGG]

Thak you for the kind words SGregory. Unfortunately I dont have a cartridge or phono stage as od yet so no listening for me! I hope to have it up and running soon.

 

[SGregory]

Are you putting a 103R on it?

 

[3GGG]

Sure am. Hope it is good. I will get the broken one retipped but the time to wait was too great for now.

 

[soundofvoid]

Great work!Enjoy your work of art!What you state about the resonance of turntable platters
regarding their materials is true if you stick to one material.
Everything changes when a sandwich of different materials is used as their different
resonance characteristics counteract leading to different (and usually better)
sonic results.The best mat i have seen was (is?) made by Verdier (France) that is
from thick rubber mixed in the melting process with lead powder...
Of course Verdier uses all metal platters...

 

[vgeorge]

The speed control works beautifully and is housed below the motor on the slate motor/speed control housing. The platter get up to full speed within a few seconds, then reduces its voltage output for a smooth ride.

Could you please give us more details on the speed controler you used?