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BSS
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Joined: May 12 2010 - 7:33pm
wobbly pitch

I posted about this in the other thread but it seems to be getting worse. Plus, my fiance notices too.

I've been noticing a wobbly pitch with a older Technics TT that I just got. The pitch control isn't a slider. It's a vertical dial that has no real "centre".

When you look straight DOWN over the platter, you can see the needle from back and for from left to right...I'm pretty sure it's not the record being warped?

Given that I don't know really how these things yet (but want to learn) any tips on how I might fix this?

Also, when I take the record off the platter, and look down over the platter, I can see it moving from side to side.

Thanks everyone...p.s. - you've all been really helpful so far. I quite like these forums and this magazine!

mrlowry
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Re: wobbly pitch

Do you know if the turntable is a direct drive or a belt drive? If it's a belt drive it might need a new belt.

BSS
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Re: wobbly pitch

well...it has a belt! I took it off and put it on again. Not sure what wear looks like on a TT belt, but it didn't seem to have any marks. Only thing - it seemed kind of loose. I'm not sure how snug these things are, but it was hard to get back on, but it kept falling off the bottom of the platter...

Remarkably, when I put it back together, it seemed a little better. Not sure what I did.

tomjtx
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Re: wobbly pitch


Quote:
well...it has a belt! I took it off and put it on again. Not sure what wear looks like on a TT belt, but it didn't seem to have any marks. Only thing - it seemed kind of loose. I'm not sure how snug these things are, but it was hard to get back on, but it kept falling off the bottom of the platter...

Remarkably, when I put it back together, it seemed a little better. Not sure what I did.

turn the the belt inside out and put it back on. That might improve it more.
A new belt should be cheap.

mrlowry
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Re: wobbly pitch

New belts are usually $7-30 dollars. Write the name and model number of the turntable down and take the old belt into the audio store. Call ahead to see if they even have belts, many don't anymore.

JoeE SP9
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Re: wobbly pitch

In emergency situations I've had some success with first boiling rubber belts then wiping them thoroughly with undiluted dish detergent. It's a trick I learned from an HP printer repair tech.

absolutepitch
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Re: wobbly pitch

If the platter is moving side to side but not going up and down like a tilted platter, it could also be an unbalanced platter. How that came about I can't imagine, unless it was a defect in the first place.

A belt that falls off has stretched from age. Get a new belt is recommended.

Freako
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Re: wobbly pitch

A thought just popped into my mind: I might suspect that the TT have had a serious fall from a shelf or the like. A out-of-centre platter isn't that normal...

Jim Tavegia
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Re: wobbly pitch
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