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In Reply to: RE: Help with a tone arm problem posted by MylesJ on February 16, 2021 at 13:22:12
I wonder if the arm lifting mechanism is touching the tonearm as it plays. Cut a strip of paper and try to slip in in-between the arm and the lift to make sure they aren't touching when a record is playing. This problem can sometimes result from raising the arm height to change VTA.
Good luck,
John Elison
Follow Ups:
MylesJ, John Elison is almost certainly correct. If trying to slip paper in between does not work for you then just get your eye level with the gap (or what should be a gap) between the arm tube and the arm lowering platform as it traverses the disc. I expect that at some point the two will meet causing a jump.
The obvious solution is to lower the arm lifting platform by a small amount so that it does not touch the arm tube when lowered but still provides a suitable amount of elevation to allow cueing.
"We need less, but better" - Dieter Rams
John - I can see light between the arm and the lift. If I hold the arm up a bit higher there is still some resistance. If I set the counterbalance so the arm floats freely and give it a horizontal tap it only goes a little bit
instead of a couple of inches.
MylesJ, thanks for the further information. Can you reverse the change that you made and see if the problem remains? It is starting to sound like a bearing issue, either the bearing itself or the lead out wires binding.
As far as I can tell from the user manual there is no automation of the arm.
"We need less, but better" - Dieter Rams
PAR - I put on a different headshell that sat too low. I had to raise VTA to the maximum to clear the record. It wasn't high enough to sound good so I put back the other headshell and dropped the adjuster to the height it was before I made the change. I think I may have raised it too high which caused the problem.
Some of those arms have a manual lever for raising the arm and some have a sensor like the 770D that kills the power to the magnet that pushes up on the lift bar from under the plinth. It is spring loaded in the up position. You can't lower the tone arm if the power is not on. That raise/lower function still works properly.
" PAR - I put on a different headshell that sat too low. I had to raise VTA to the maximum to clear the record. It wasn't high enough to sound good so I put back the other headshell and dropped the adjuster to the height it was before I made the change. I think I may have raised it too high which caused the problem."
So I understand from this that the problem was a physically incompatible headshell and therefore assume that the issue has now been fixed.
"We need less, but better" - Dieter Rams
PAR - no, the horizontal resistance still happens with the original head shell. Not much horizontal resistance to moving the arm manually but enough that the arm cannot move it before it skips backward.
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