those who are experiencing speed flutter may need to check and adjust for accurate spindle to platter plumb. Observe the clearance space between the bottom of the platter and the plinth; place a an index card on the plinth and mark it where the platter-bottom aligns. Turn the platter manually or run the motor, while observing for any clearance variations at the mark on the card. If any rotational wobble is observed then you must adjust one or more of the 3 allen screws around the platter's center to correct the alignment. Rotate one of the screws about 1/4 turn, keeping track of which screw is turned, in which direction, & how far it was turned. It's a short process of elimination to determine what adjustments are required to level out the platter.
VPI HW19 Mk IV platter upgrade, speed variations?
Hello,
I recently purchased an upgraded HW19 Mk IV with a VPI upgraded platter. The upgraded platter is so thick that it keeps the dustcover from closing when the record clamp is on. The cover also presses against the tonearm when the clamp is not in place. I have an overhang above my turntable, so leaving the dust cover open is not an option.
In lieu of buying a taller cover, I have reinstalled the old platter, which was included. Aesthetically, it's much improved, and the cover is functional again.
However it seems as though I detect some platter speed variation with the original platter.
I wonder several things:
- First, I'm not sure the variations are real - I'm just beginning to get back into vinyl after a 15-year haitus. So, my ear and my benchmarks may be off. I would think the VPI would be good enough that speed fluctuations would be nearly inaudible???
- Would the significantly greater mass of the upgraded turntable smooth out platter speed variations, to the extent that they're audible?
- Might there be a problem with either the belt or motor, due to wear/age, and this is the root problem that the previous owner tried to overcome w/ the upgrade?
- How does one measure platter speed variation, to be sure?
- I'd like to just sell the upgraded platter and bearing, since this solves my dustcover problem, but not if the upgrade gives a real and significant improvement.
Any thoughts/observations/guidance would be appreciated.
I recently purchased an upgraded HW19 Mk IV with a VPI upgraded platter. The upgraded platter is so thick that it keeps the dustcover from closing when the record clamp is on. The cover also presses against the tonearm when the clamp is not in place. I have an overhang above my turntable, so leaving the dust cover open is not an option.
In lieu of buying a taller cover, I have reinstalled the old platter, which was included. Aesthetically, it's much improved, and the cover is functional again.
However it seems as though I detect some platter speed variation with the original platter.
I wonder several things:
- First, I'm not sure the variations are real - I'm just beginning to get back into vinyl after a 15-year haitus. So, my ear and my benchmarks may be off. I would think the VPI would be good enough that speed fluctuations would be nearly inaudible???
- Would the significantly greater mass of the upgraded turntable smooth out platter speed variations, to the extent that they're audible?
- Might there be a problem with either the belt or motor, due to wear/age, and this is the root problem that the previous owner tried to overcome w/ the upgrade?
- How does one measure platter speed variation, to be sure?
- I'd like to just sell the upgraded platter and bearing, since this solves my dustcover problem, but not if the upgrade gives a real and significant improvement.
Any thoughts/observations/guidance would be appreciated.