TurnTable Servicing: Toshiba SR-300C

[RCruz]

Maybe the rubber belt is too small.

As for the hum, you must verify the GND connections of the tonearm.

Try to oil the motor bearings and verify if it reduces noise.

PS:
TT do not fly at all.

Ricardo

[Malefoda]

We can bring a CD-53 in outerspace, why not this TT in my garden?

Noise was the motor metal idler too close to motor cage. Screwed it a bit higher and it's smooth as silk and silent as a diesel submarine.
But when belt is on the story changes : the motor starts to hum a bit, too much for me (more than CD mech or the Denon... can hear it from meters away).
Anyway you can check this new video and the belt wich I feel a bit tight (and may pull the motor shaft at the top only and make it noisy...).
And it's too slow. I don't know if I would have noticed it if I did not used a speed probe but I did and as I know it I can't cope with.
So it's the belt or the metal shape on the motor wich may have lost some thickness, or both... Where may I find the REAL specifications of my TT? Many website are selling belt but who telle me they do it with a small margin in spec and therefore play at the limits?
I've checked with a simple string wich... is 677 mm when the sold one is 635 but soft and they can sell 654 ones...

Don't know!

http://www.youtube.com/watch?v=lD3YEKCGrv0

[RCruz]

The belt looks too tight.

Also klean the motor puley with some alcool.

Use chalk or talk power in the belt on both sides to minimize sticking.

As for the speed, verify the voltage stettings...
Your motor is frequency locked so it is independent from the voltage fluctuations.

Also I believe your belt is touching the speed selector arm.

Otherwise it looks fine from here.

[Malefoda]

I'm in touch with a Thorens Master. Seems the belt too tight is something to be real...
For the arm the clearance is ok don't worry.

Thanks Ricardo

[Malefoda]

So,
belt made loose by days on a bigger round cylinder : just works fine. Sound is far better on that Toshiba (even if all the world said nothing can beat a Thorens) than on the Denon. Smooth, fluid and well balanced. The simple arm may be a good point.

Enough for now, let's see if I'm taken by a Thorens fever or not...

[Malefoda]

I've to learn how to adjust it but seems fine already.

[RCruz]

Way cool.

What do you need to know about adjusting ?

[Malefoda]

Hi Ricardo,
I wanna know how and if possible to change the bushing in bottom (what's the word?), the single ball/bearing has made a trace on Nylon bottom, also how to make it... slower (belt too loose?) and how/with what to clean the suspensions, there is an "ideal-15-sec-boucing" wich it does not achieve even if it bounces quite well. That's for fine tuning as it works like clockwork already, I'm amazed how dead silent it is!

[RCruz]

I will look for the bushing issue.

To make it slower, you must use some tape over the inner platter and run the belt over it.

The tape will increase inner platter diameter, so it will run slower.

Thorens are really silent.

[Malefoda]

Nice! I have some nice aluminium tape I may stick on it, strong, flat, cool.
In fact I may get a TD318 for cheap soon, I'll have to choose and go on deep tuning with the chosen one. It may be the TD318 as it's said to be underestimated and better suited for my occasional use. Will see...