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[Help] Turntable Hum Problem (Pro-ject Debut Carbon)

Morphy

Morphy

New Member
Hi there guys, I really need your help.. I don't know a better place to ask then on an audiophiles forum. I've uploaded video to YT describing my problem (it was easier like that I guess).


My knowledge about this issue is really limited unfortunately.. :(

Thanks in advance,
Morphy.
 
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Stillhouse said:
WD-40 is NOT good for electronics cleaning. Get something else, CRC contact cleaner and/or DeOxit. At the least, clean off the WD-40 with isopropyl alcohol.
Click to expand...

Damn, I didn't know that.. :c So I should first get some Isopropyl alcohol to clean the residue/leftovers from WD-40? And then use CRC contact cleaner and/or DeOxit, if I understood you correctly?

Which one of these DeOxit products do you recommend Stillhouse?
https://www.svalander.se/shoppen/deoxit-oljor/deoxit/deoxit
 
If you don't have any other cleaner available, then isopropyl alcohol can do a decent job in the meantime. I would still try to get some CRC or DeOxit spray to thoroughly clean out the WD-40.
 
Morphy,
Is the preamp, the table, and the amp all plugged into the same outlet?

When you reduce the hum by touching the ground screw, that says (to me) it's probably ground loop, not a table hum issue.
 
TudorTurtle said:
Morphy,
Is the preamp, the table, and the amp all plugged into the same outlet?

When you reduce the hum by touching the ground screw, that says (to me) it's probably ground loop, not a table hum issue.
Click to expand...

Hi there Tudor, I've just tried hooking them up onto single outlet and nothing changed. :')
 
Morphy said:
It's Ortofon's 2M Blue sir.
Click to expand...
The Blue is the best bang for buck cartridge on that table IMHO. I had a hum on my table last year. It ended up being the connections to the cartridge. The Blue, on its own, should not be the origination of the hum.
 
I'm thinking you installed the cartridge? If so, did you accidentally swap one of the cartridge wires?

Red = right +
green = right -

white = left +
blue = left -

At least a place to start.

Also the cartridge has a removable stylus, is it in all the way?
 
trinhsman said:
The Blue is the best bang for buck cartridge on that table IMHO. I had a hum on my table last year. It ended up being the connections to the cartridge. The Blue, on its own, should not be the origination of the hum.
Click to expand...
One more thing. If you suspect a ground loop, and your table has a 3 prong plug, try a cheater plug. (2 prong plug adapter)
 
trinhsman said:
I believe you are correct. Any chance there is something going on with the wart? Just a thought.
Click to expand...

Yes. The wall wart has a transformer in it and while the electrical field around it is not huge, it might penetrate a poorly shielded interconnect, if the wall wart is nearby. I would have it plugged in as far away as possible.

Hard to solve these hum problems on a forum, so start at the beginning and try to answer some questions. If it is proven to be not a problem, move on down the chain. Hopefully the turntable is grounded to the phono preamp......
 
WaynerN said:
I'm thinking you installed the cartridge? If so, did you accidentally swap one of the cartridge wires?

Red = right +
green = right -

white = left +
blue = left -

At least a place to start.

Also the cartridge has a removable stylus, is it in all the way?
Click to expand...

Here are some pic's. Cartridge was installed by the guy at the store where I've bought the turntable, it looks like it's in order to me! Also, I don't how one day it could have worked so flawlessly..

wuJWRBj.jpg


xpQCDAH.jpg
 
Morphy said:
Here are some pic's. Cartridge was installed by the guy at the store where I've bought the turntable, it looks like it's in order to me! Also, I don't how one day it could have worked so flawlessly..

wuJWRBj.jpg


xpQCDAH.jpg
Click to expand...

What is with the black wire.......looks like its going to a mounting screw. Isn't the tonearm a carbon-fiber one? If so, you can't ground that!
 
WaynerN said:
What is with the black wire.......looks like its going to a mounting screw. Isn't the tonearm a carbon-fiber one? If so, you can't ground that!
Click to expand...

"Black would = 'ground' which would run from your arm wand to the ground tab on your phonostage case." one guy said.

1395226-project-9c-carbon-fiber-toneaarm.jpg

(This is some pic from the net.)
 
But your cartridge body is made of plastic and your armtube is carbon fiber. There is your problem, your still not grounded. I think you have to add a ground wire to the metal base of the arm as it too is acting like an antenna. If you could find a piece of wire and attach it to the base of the arm and the other end to where the other black ground wire goes to (supposedly to the ground wire post on the phono preamp, that should get rid of the hum.

Right now, where does the black wire end up terminated to?
 
yJwzvRr.jpg


Am I right about this?

So, I'm gonna try now as you've said, to use a piece of wire and connect it from the base of the tonearm 'till the pre-amp.
 
You can also try jumping a wire from the "start of the black cable" to the grounded thumb screw. If the hums stops --- there's a problem of wiring within the tonearm.

The turntable is currently being connected from the grounded thumbscrew at the back of the turntable to the phono pre-amp's thumbscrew?
 
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