DIY Turntable.....is....finished?

[vinyldavid]

No. It will probably never be finished.

but it does most of the things that a turntable is supposed to do. :banana::banana::banana:

It will play a record, but the arm is only working in one channel-will have to address that ASAP- and the lack of a bearing makes it skip every revolution when the arm's near the outside of a record.


But the sound is good. VERY good, IMO. :music::thmbsp:


However, the speed is off. Little fast at about 4v. So I'll have to work on that being more stable. Also, the motor is just not powerful enough to drive that big platter, so the wow and flutter is insane.


All of this was achieved using found parts, and a total cost of $0.


I think that the project suceeded beyond my wildest expectations, as it actually works, and if the motor was stronger, it would actually be a fully working turntable with a low wow and flutter spec.

Next motor: Dual 1218, soon as I get a power supply worked up for it where I an change the AC freq to match the platter.

Parts used:

Motor from a Marantz TT (BPC, 1989 or so)
Shure M232 arm from a Russco CueMaster that I was given
platter/mat/bearing assmebly from a Elac XS-200 that I was given
Shure M93 with original stylus that came with the XS-200
Barrier strip that I have no idea where is came from
RadioShack semi-variable power supply, no idea where IT came from, either
Assorted wires that were laying around.

The wiring going in:
http://i267.photobucket.com/albums/ii298/vinyldavid/1220210971.jpg


The (semi)finished project:
http://i267.photobucket.com/albums/ii298/vinyldavid/1220210975.jpg


The lovely and talented Alexis (my lovely girlfriend) with the turntable:
http://i267.photobucket.com/albums/ii298/vinyldavid/1220210979.jpg

The first record played, Simon and Garfunkel's Concert at Central Park:
http://i267.photobucket.com/albums/ii298/vinyldavid/1220210982.jpg

Alexis cuing a record:
http://i267.photobucket.com/albums/ii298/vinyldavid/1220210988.jpg

[stuartypoorty]

David,

This might spark your imagination; search the archive on the Audio Origami site for the "Floppy Project"

www.audioorigami.co.uk

[vinyldavid]

Just got the motor system out of the base of the Elac that this all started with. This time, I was smart enough to take the entire wiring set out of the turntable, and bypass the on/off switch.

I wired it up to the 70v output of my Realistic MPA-35 (or 40, I forget which), and turned up a 60hz signal fed from my iPod, and it turns with nice torque.

Just gotta get the stepped pulley (I guess that's what it's called...) off so that the motor shaft is driving the belt. I would think that doing that would give a better ratio to the platter speed.

Or do you think that the original 33RPM diameter would be better?
I'd have to make a baffle so that the belt does not come off, but I think that it would be workable. It's about the correct size, height wise for the belt.