VinylRecorder Groove speed motor noise through record

[David34]

Hey guys n gals../

The power supply we have rigged up is a CODEGEN 400W ATX 2.03 MODEL: 400X

It has a variety of voltages that you can simply have the wire coming out of the box as, we have it as 12v and the wires straight into the RIAA/EQ

Being indépendant of the groove speed motor means there is no chance of any of that whining come through into the cuts.

I would attach a photo but it's not easy through this forum so PM me and Ill email it to you.

Hope this helps some of you guys out. l.

[torykay]

Hi,
does anyone have a photo of this modification? I yes, please mail it to me.
Thanks

[David34]

Sorry mate no, it is all installed now and an absolute pain to open. If you know an electrician then it's a simple fix for them!

[blackmoondivision]

At the risk of repeating myself, could you let me know what current (Amps) your new PSU is rated for please?
i.e. the one which now feeds power to your main unit's iRIAA/EQ circuits.

Thanks in advance

Hi,

Have you find out the answer?

Thanks
Tomas

[David34]

please PM me your email addresses and I’ll send a photo..

Can’t do it on here for some reason?!

[Discomo]

please PM me your email addresses and I’ll send a photo..

Can’t do it on here for some reason?!

There's a button 'upload attachment'. press this. Than a subbox opens. Press 'browse'. Now you can find your file on your computer. Then: press 'add the file'. Press 'Submit'.
See attachment!!

[Xtrica]

there's a small cable that connects the two boards, do you just feed 12v directly in that cable?

PicsArt_07-22-02.19.13.jpg

[David34]

Correct!! Supply the PSU as above!

Whine gone!!

Why did Souri not do this!?

[Xtrica]

I did this today, it removed the noise that changes with the speed of the motor but there's still something that sounds like an electrical noise.

[PMST]

Can you post a audio sample of the noise?

[David34]

Try a power filter or a behringer hum destroyer..

[Xtrica]

After many months of testing and headaches I've finally fixed all noises of the vr.

My recommendations in order

Split the power supply of the main unit ( check this thread for how to, although stressful it's quite a cheap and easy fix)

Replace all of souri's RCA cables, keeping lengths as short as possible.

Do not rack all the gear together (unless each rack is isolated from each other, if you don't understand it just keep them stacked and avoid problems)

Remove all lights from the the same power of the machine

Check all digital devices connected to the system for noise (oscilloscope is your friend)

Finally enjoy noiseless cuts!!!

[Vinylfan]

Going back to the original post where the question was, why there is a noise coming from the groove speed motor and if this noise might be due to a «earth loop»:

Yes, this noise is due to a ground loop, mostly between the cutter amp and the main unit.

There are 3 ways to solve this:
1. Split the power supply of the main unit as discussed in this thread
2. Use exclusively (and only) the power accessories that came with the VR
3. Disconnect the Ground Pin of the 12V Power supply of the main unit.

Be aware that the 3rd solution might be dangerous in case of an electrical malfunction.

[Discomo]

This is a very interesting topic and the idea to split the psu to two separate psu’s is marvelous!
But I do wonder how this relates to warranty of the VR. Does anyone know if this mod is agreed upon by Souri?

[goawayevil]

love this thread!