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Topic: The length of a 20:00 groove

29th Jul 2021, 1:52 AM
	Break-In Master Member since Dec 2013 251 Points	Nearest I can figure, if we can measure the width of the record from the outermost groove of the music, then get the circumference of that then do the same for the inner-most groove of music and get the circumference of that, then find the average between those two final numbers, and multiply that by 666, that SHOULD give us the number we're looking for!! As most albums start and end in about the same spot no matter how long the record is, pretty much any album will suffice to take measurerments from. I asked this at another public site two days ago and had one guy ffactor in the measurements of the labels, the playing surface of both halves of the record (he was going at it via a cross-section and I told him there's no grooves on the label, unlless we're talking about a Jack White album.), the inner and outer lead-in/out grooves, etc. Another seemed to be factoring in the speed at which the needle travels through the grooves (about 5.45" per second). Just pulling numbers out of the air for what I THINK the inner and outer measurements would be, I ASSUMED the average length of a groove would be 25.5". One of the others, who was a bit more methodical about it, came up with pretty much the same number! (GOD, I'm good!!) As I DO have a few dozen albums here (they mostly belonged to grandma, this was originally her house. All of my records that I was able to rescue from my house are still in storage.),I'll see a about taking measurements from one of them in a bit but, as I've only got standard house rulers that only go to about 1/16 of an inch, it might not be that accurate.