Decimal Gramophone

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Decimal Gramophone

Karl Palmen

Dear Calendar People

 

Some time ago, I realised the a Vinyl LP, which goes round at 33 1/3 revolutions per minute, would  in decimal time, go round exactly 48 revolutions per milliday. Also a 45 would be a 65.

 

Conversions for other speeds for gramophone records would be:

 

16 2/3 revolutions per minute = 24 revolutions per milliday

33 1/3 revolutions per minute = 48 revolutions per milliday

45 revolutions per minutes = 64.8 revolutions per milliday about 65 revolutions per milliday

78 revolutions per minute =  112.32 revolutions per milliday about 112 revolutions per milliday

 

All these speeds are approximately an integer multiple of 5 5/9 revolutions per minute = 8 revolutions per milliday:

3: 16 2/3 revolution per minute = 24 revolutions per milliday

6: 33 1/3 revolutions per minute = 48 revolutions per milliday

8: 44 4/9 revolutions per minutes = 64 revolutions per milliday

14: 77 7/9 revolutions per minute = 112 revolutions per milliday

 

 

Karl

 

15(15(15

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Re: Decimal Gramophone

Vladimir Pakhomov-2

So what?

 

Vladimir Pakhomov

http://dominorus.majestic64.com/

http://dominorus.site50.net/

 

 

 

From: East Carolina University Calendar discussion List [mailto:[hidden email]] On Behalf Of Karl Palmen
Sent: Wednesday, August 17, 2016 3:24 PM
To: [hidden email]
Subject: Decimal Gramophone

 

Dear Calendar People

 

Some time ago, I realised the a Vinyl LP, which goes round at 33 1/3 revolutions per minute, would  in decimal time, go round exactly 48 revolutions per milliday. Also a 45 would be a 65.

 

Conversions for other speeds for gramophone records would be:

 

16 2/3 revolutions per minute = 24 revolutions per milliday

33 1/3 revolutions per minute = 48 revolutions per milliday

45 revolutions per minutes = 64.8 revolutions per milliday about 65 revolutions per milliday

78 revolutions per minute =  112.32 revolutions per milliday about 112 revolutions per milliday

 

All these speeds are approximately an integer multiple of 5 5/9 revolutions per minute = 8 revolutions per milliday:

3: 16 2/3 revolution per minute = 24 revolutions per milliday

6: 33 1/3 revolutions per minute = 48 revolutions per milliday

8: 44 4/9 revolutions per minutes = 64 revolutions per milliday

14: 77 7/9 revolutions per minute = 112 revolutions per milliday

 

 

Karl

 

15(15(15