From: henkweltje@wanadoo.nl   
      
   Hi all,   
      
   Maybe this topic was already addressed in this newsgroup, but anyway...here   
   you are...   
   My father (76) repaired since WWII up to now all kinds of audio and video   
   equipment, but is still puzzled if there is some logical explanation why the   
   rpm numbers of the major record sizes 16 2/3,  33 1/3, 45 and 78 relate so   
   much.   
      
   Is there an explanation why :   
   a) the sum of 33 and 45 equals 78   
   b) two times 16 2/3 equals 33 1/3   
   or is this just a big coincidence?   
      
   Today he asked his question on a dutch radio station and they didn't know.   
      
   Although you probably know, 16 2/3 was only used for recording speech and   
   later replaced by tape recorder.   
      
   Thanks for answerring this one,   
      
      
   Henk Weltje   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)