2. analog
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checking platter speed

Two questions:

1) How can I be sure that my platter is rotating at the correct speed?

2) If my platter is not rotating at the correct speed, how do I remedy this?

I have a Clearaudio Emotion turntable.

Thanks in advance for your help.

Danny
rosedanny

Showing 2 responses by amandarae

amandarae
512 posts
 
http://www.kabusa.com/frameset.htm?/

Look for KAB Speed Strobe under "Favorite Items" on the right.
amandarae
512 posts
 
Hello,

It runs at 300Hz and is much more accurate than the usual 60Hz type.

Will that be because you strobe at 300 Hz then divide that by 5 just like calculating the 72 degree from a 360 degree pulse?

The KAB speed strobe specifies 99.99% accuracy at display frozen. The exact figure quoted was 0.03% off from 33.3333333..nnn.... rpm. How accurate do we need to be if a speed change alters pitch barely at 6% according to KAB and if the usual/typical "broadcast accuracy" is at 0.3% off pitch?

regards,

Abe
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