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RPM of 3 inch records
Posted: Thu Jul 15, 2010 3:42 am
by lightschuh
I was just wondering the speed. I don't own a triple inchophone but would like to know.
Re: RPM of 3 inch records
Posted: Sat Jul 17, 2010 10:32 pm
by barrowc
From
http://littleroom.whitestripes.net/inde ... &p=1682272
I took a close-up photo of "The Denial Twist" 3" record and counted the grooves* (how sad am I?) There were 89.
The CD version of the song runs for 2:32 - it comes up as 2:35 on my CD player but the last 3 seconds are silence.
If we allow for 3 seconds of silence at the start and end of the 3" record then this means that the 89 grooves cover 2:38 = 158 seconds = 1.775 seconds per revolution = 33.8 RPM so the real figure is almost certainly 33 1/3 RPM
---
*not including the run-in and run-out. I know that there is actually only one groove but "grooves" is easier than "intersections of the groove with the radius of the record" which is what I actually counted
Re: RPM of 3 inch records
Posted: Sun Jul 18, 2010 1:25 am
by love_islander
barrowc wrote:From
http://littleroom.whitestripes.net/inde ... &p=1682272
I took a close-up photo of "The Denial Twist" 3" record and counted the grooves* (how sad am I?) There were 89.
The CD version of the song runs for 2:32 - it comes up as 2:35 on my CD player but the last 3 seconds are silence.
If we allow for 3 seconds of silence at the start and end of the 3" record then this means that the 89 grooves cover 2:38 = 158 seconds = 1.775 seconds per revolution = 33.8 RPM so the real figure is almost certainly 33 1/3 RPM
---
*not including the run-in and run-out. I know that there is actually only one groove but "grooves" is easier than "intersections of the groove with the radius of the record" which is what I actually counted
That's some respectable dedication
Re: RPM of 3 inch records
Posted: Sun Jul 18, 2010 2:20 am
by 7th_son
love_islander wrote:barrowc wrote:From
http://littleroom.whitestripes.net/inde ... &p=1682272
I took a close-up photo of "The Denial Twist" 3" record and counted the grooves* (how sad am I?) There were 89.
The CD version of the song runs for 2:32 - it comes up as 2:35 on my CD player but the last 3 seconds are silence.
If we allow for 3 seconds of silence at the start and end of the 3" record then this means that the 89 grooves cover 2:38 = 158 seconds = 1.775 seconds per revolution = 33.8 RPM so the real figure is almost certainly 33 1/3 RPM
---
*not including the run-in and run-out. I know that there is actually only one groove but "grooves" is easier than "intersections of the groove with the radius of the record" which is what I actually counted
That's some respectable dedication
WORD.
Re: RPM of 3 inch records
Posted: Sun Jul 18, 2010 5:56 pm
by dylnfan
barrowc wrote:From
http://littleroom.whitestripes.net/inde ... &p=1682272
I took a close-up photo of "The Denial Twist" 3" record and counted the grooves* (how sad am I?) There were 89.
The CD version of the song runs for 2:32 - it comes up as 2:35 on my CD player but the last 3 seconds are silence.
If we allow for 3 seconds of silence at the start and end of the 3" record then this means that the 89 grooves cover 2:38 = 158 seconds = 1.775 seconds per revolution = 33.8 RPM so the real figure is almost certainly 33 1/3 RPM
---
*not including the run-in and run-out. I know that there is actually only one groove but "grooves" is easier than "intersections of the groove with the radius of the record" which is what I actually counted
I'm speechless...
Re: RPM of 3 inch records
Posted: Mon Jul 19, 2010 10:15 pm
by lightschuh
thats amazing! thanks alot
Re: RPM of 3 inch records
Posted: Tue Jul 20, 2010 7:46 am
by trickster
hahahaha awesome!
Thanks for the info
I once asked elduderino to play his DT 3" and count the spins to find out the RPM but he refused to do this for me
I wonder why
Re: RPM of 3 inch records
Posted: Tue Jul 20, 2010 8:06 am
by stoutr
The person that posted that needs to be here and not on the LR.
Panos, i played mine for my youtube channel. UltraRareVinyl
Re: RPM of 3 inch records
Posted: Tue Jul 20, 2010 8:15 am
by trickster
stoutr wrote:
Panos, i played mine for my youtube channel. UltraRareVinyl
I checked them Chris.
Thanks for posting them
Re: RPM of 3 inch records
Posted: Tue Jul 20, 2010 5:45 pm
by higherlimits
Colin was the one that originally posted that on the LR..
Re: RPM of 3 inch records
Posted: Sun Sep 05, 2010 3:54 pm
by rsimms3
Re: RPM of 3 inch records
Posted: Sun Sep 05, 2010 4:07 pm
by hawke000
uh is that absolutely destroying the record?
Re: RPM of 3 inch records
Posted: Sun Sep 05, 2010 6:41 pm
by rsimms3
The tone arm was adjusted to appropriate tracking weight so I didn't see any problem with it. The way these are made, just about any play probably has some sort of negative effect on them. They weren't exactly made for Hi-fi playback.
Re: RPM of 3 inch records
Posted: Sun Sep 05, 2010 7:46 pm
by Grimtale
Dude, that's fucking uber. Nice turntable too. That's content with value, which is rare around these parts lately.
Grim
Re: RPM of 3 inch records
Posted: Mon Sep 06, 2010 4:04 am
by rsimms3
Thanks Grim!