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judicata
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TT Woes? or not?

When I spun up my Rega P2 the other day, I heard a disconcerting sound - it was like a pulsating grinding (or 'whoosh'), I'd say pulsating about 3-4 times a second, varying with the speed of the spin. I give my Rega a little turn with my hand before flipping the switch. The sound started with the manual spin and continued with the motor. I shut off the motor, removed the platter, examined everything (it was kind of like opening the hood of a car - I have no idea what I expected to see), put the platter back on, and it went away. Yesterday, I tried to reproduce the sound and was successful. Then I disconnected the belt from the motor to the subplatter, and the platter spin was dead quiet. When I reconnected the belt, I could hear a "whooshing"-like noise. I have to put my ear up to the TT to hear it. The pulsating sound has not come back, but it appears that the noise is coming from the motor spindle. The persistent whooshing noise certainly is coming from the motor assembly, but I'm not 100% sure about the pulsating noise, although I cannot reproduce the sound with the belt detached.

I never noticed the quiet "whooshing" sound before, and I believe I recall it being dead silent even with the belt attached when I inspected everything when I got the TT months ago. Does anyone have a Rega and/or know whether you can hear anything at all when you spin the platter with the belt attached?

Any other ideas? I'm going to talk to the dealer, but it is a real pain in the neck to get my TT down to them, so I want to do any troubleshooting I can to make the trip to the dealer as efficient and fruitful as possible. If the quieter sound is normal, I don't want to bother hauling it down to the dealer.

tom collins
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Re: TT Woes? or not?

i had a p2 in the recent past and do not recall any sounds like you describe. probably a good idea to let the dealer check it out. may be nothing and you have piece of mind, may be something and it doesn't get worse.
let us know what you decide.

smejias
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Re: TT Woes? or not?

When it's cold in my apartment and I power up the P3, I get a sound something like what you're describing. I just figure it's the belt loosening up, like with a car that's been sitting in the cold for awhile. It never happens when it's warm.

I'm not sure, though. I'll ask around.

judicata
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Re: TT Woes? or not?

Thanks guys. Stephen, can you hear anything when you listen closely under normal circumstances, or is it dead quiet?

smejias
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Re: TT Woes? or not?


Quote:
Thanks guys. Stephen, can you hear anything when you listen closely under normal circumstances, or is it dead quiet?

I'll try to give it a close listen tonight or this weekend and report back.

judicata
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Re: TT Woes? or not?

Thanks, man. I'd really appreciate it.

ncdrawl
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Re: TT Woes? or not?

same thing here with the p2, nothing bad i figure, just warming up. goes away in about a minute or so(only does it when cold)

judicata
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Re: TT Woes? or not?

Thanks - reassuring. I'll probably just monitor the situation and make sure it doesn't get worse.

smejias
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Re: TT Woes? or not?


Quote:
Stephen, can you hear anything when you listen closely under normal circumstances, or is it dead quiet?

After just a moment of noise -- really the briefest moment upon power-up -- it settled into dead silence.

judicata
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Re: TT Woes? or not?

Briefest moment, eh? Mine seems to continue, but it is not the "startup noise" that is really common, although I get that sometimes too (but it doesn't bother me).

Well, I guess I'll just monitor it, but I have to wonder if the motor spindle needs a little oil or something.

Jan Vigne
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Re: TT Woes? or not?

Try three things. First, remove the subplatter and make certain there is sufficient oil in the bearing. Second, clean the belt and the subplatter's outer surface with alchohol on a cotton pad. Third, drop the belt into a sandwich baggie with about a small amount of unscented talcum powder. Shake well - like you were making fried chicken - and then shake the excess powder off the belt. Make certain there is no talcum powder that gets into the bearing or on the table's plinth when you reinstall the belt.

judicata
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Re: TT Woes? or not?

Jan - thanks, that sounds like a plan. I don't have any bearing oil, so I'll order some and hold off on removing the subplatter until I get it. Also, when I remove the belt, everything is dead quiet, so I doubt it is the subplatter assembly. Then again, now that I think about it, I guess the added stress of being connected to the motor spindle might cause some friction and the sound could be coming from the subplatter?

Since I listen to 45s, and I have to manual move the belt on the Rega, it is entirely possible (nay, almost certain) that I've gotten finger oils on the belt at this point. I'll definitely do the talcum trick.

Jan Vigne
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Re: TT Woes? or not?


Quote:
I don't have any bearing oil, so I'll order some and hold off on removing the subplatter until I get it.

Rega suggests using lightweight bicycle oil/grease (available at any bicycle shop) as a simple replacement for their own bearing oil. Rega sells their oil but most dealers don't carry it in stock.

If you clean out the bearing, you can experiment with other lubricants. I've used SuperLube with Teflon in many tables to great success. It comes in a small tube for a few dollars and should be available at most hardware stores.

When cleaning the bearing you might pull out the small ball bearing at the bottom of the bearing well (if there's oil in the bearing well, you'll have to work at this a bit or let the table sit upside down until the ball drops out along with some bearing oil) and check it for any propblems. Make certain you don't loose this bearing while doing the work. There must be a ball bearing at the bottom of the Rega main bearing well.

I would pull the subplatter now. If there is sufficient oil (use the main bearing as a dipstick), then just drop the subplatter back in place. If there isn't enough oil, then you shouldn't be running the table.

Jan Vigne
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Re: TT Woes? or not?


Quote:
Then again, now that I think about it, I guess the added stress of being connected to the motor spindle might cause some friction and the sound could be coming from the subplatter?

This is one of the issues with turntables. There must be sufficient clearance for the bearing to run. When the bearing is put under load the bearing is pulled slightly to the side. Removing the belt removes the load.

JohnMichael
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Re: TT Woes? or not?

My Planar 2 began making a similar noise after I replaced the stock subplatter with a machined subplatter. The noise continued until I realized the subplatter was not fully seated. A little more pressure and the subplatter was in place. The noise stopped. I would check that the subplatter is fully seated in the shaft.

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