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33 rpm to bpm pro#
When I was working part time at Pro Electronics, back in 1979-1983, I took the position that anything that was less than 2% fast was "OK," based on that strobe disc.
33 rpm to bpm plus#
Not meaning to hijack the thread, but since we were talking about turntable Phil: First, how did you come to that 4.5% fast measurement? Did you use a calibrated strobe disc? I have an 8 inch calibrated diagnostic strobe that measures all 4 speeds and has bands for plus 2% and plus 4% and minus 2% and minus 4% for each speed, made by Audiotex. Don't expect that you will have exact tempo or tune, even if your turntable is running correctly.Īnd good luck from that out of tune old guy, Most of the turntables that I have owned and measured over 50 years in the hobby, including Thorens and Garrard and Dual players that do not have exact vernier speed adjustment all run a little fast.Īlso, you will find often that you will not be able to tune a record to the exact pitch of an instrument a that you are playing because of speed irregularities that are a part of the recording process. This is so that as they slow down over time, they will not become too slow. You will find that most turntables that do not have vernier speed adjustment run about 1-1 1/2 percent fast. If speed measures correctly and music still sounds slow, then you may have a defenct in pressing, or you could be deceived by fact that a lot of turntables run a little fast. If more or less, turntabel is fast or slow. The second way is to put a piece of tape on the turntable and count te number of times it spins to the exact same spot in 3 minutes. If they move counterclockwise, turntable is slow. If they move clockwise, turntable is fast. If dots stand stlii, turntable is on speed. click on "Strobe discs." Then just print one for 33 1/3 RPM use a neon or incandescent bulb and hold bulb near dusc as it spins. Click on "Tools" and when you get the "Tools" page.
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The discs can be found and printed on this website, up at top of this page. You can get a strobe disc and measure the turntable speed with the strobe disc. There are a couple of ways to find out if turntable is running slow. The first possible answer is that there is something wrong with your turntable that is causing it to run slow. The second question is why do some records sound slow to you? The answer to that is somewhat more complicated, with several possible answers. Yoy really have 2 questions: The first is what is what does the mark on your recoird player that says "33" mean? The answer to that is that the marking refers to an actual exact speed of 33 1/3 RPM.
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