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Turntable not spinning fast enough on 45
powerstone05
post Jan 5 2013, 01:48
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I have (now) a GemSound BJL-1150. The problem I'm having is that the 45 rotation is quite slow and is noticeable in playing. The 33 seems to be fine though. I checked the belt and it's still in working order. Any ideas?
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Glenn Gundlach
post Jan 5 2013, 04:36
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QUOTE (powerstone05 @ Jan 4 2013, 16:48) *
I have (now) a GemSound BJL-1150. The problem I'm having is that the 45 rotation is quite slow and is noticeable in playing. The 33 seems to be fine though. I checked the belt and it's still in working order. Any ideas?


So you get a strobe disc and measure it. It's not at all difficult or costly. You print this sheet and put it on the turntable and use an OLD STYLE fluorescent light. Rapid start or really old with a starter. This will NOT work with electronic ballast lights. Alternatively one of those neon tester lights would work fine. If the pattern appears to be standing still, it's dead on. These folks also have a 50Hz version if you're not in North America.

http://extremephono.com/ftp/60Hz.PDF

G
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powerstone05
post Jan 5 2013, 06:11
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QUOTE (Glenn Gundlach @ Jan 4 2013, 23:36) *
QUOTE (powerstone05 @ Jan 4 2013, 16:48) *
I have (now) a GemSound BJL-1150. The problem I'm having is that the 45 rotation is quite slow and is noticeable in playing. The 33 seems to be fine though. I checked the belt and it's still in working order. Any ideas?


So you get a strobe disc and measure it. It's not at all difficult or costly. You print this sheet and put it on the turntable and use an OLD STYLE fluorescent light. Rapid start or really old with a starter. This will NOT work with electronic ballast lights. Alternatively one of those neon tester lights would work fine. If the pattern appears to be standing still, it's dead on. These folks also have a 50Hz version if you're not in North America.

http://extremephono.com/ftp/60Hz.PDF

G


Funny you mention this, I tried this exact disc (along with the strobe system built into the platter itself) and it proves my point again, it's too slow. Even with the pitch adjustment all the way to max (+10%), its still not enough.
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mzil
post Jan 5 2013, 06:57
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Short of getting it fixed or buying a new turntable, what about recording the music to your computer and correcting the speed (and therefore pitch) in software? Just a thought. If the optical disc shows the speed error is constant and non-wavering I'd think this would work well.

This post has been edited by mzil: Jan 5 2013, 07:00
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