Full Manual Turntable-What to do

Obviously removing a clamp with a spinning disc is a recipe for trouble. And if your deck is designed for a clamp then sure use one. My experience is however that for decks not designed for clamps they can deaden the sound making it slow and heavy. The one thing I do do is to use thin washers to ensure the center of the label is supported as my deck has a label cut out and depending on the disc and label thickness the center may float. This makes a subtle difference

I made the comment above, assuming that all know I use a "weight", not a clamp.

folkfreak:,
 
Your observation is noted. I used a ET arm for years. This arm is more sensitive to record flatness.

During this time, I experimented with different thickness, center washers.

I had Herbies make a .08mm washer for me during this time.

It worked very well! One thing that is not very much noted.. the record label thickness. This is one other aspect that is of notable consideration when thinking about these issues.

Record flatness. This (IS) the main issue when approaching this topic.

If your dealing with a "flat lp", and using a .08mm washer on a platter that has a machined relief for the lp label thickness, (shew!) ..a center (weight) is appropriate. In this scenario, a clamp is not the best option.

I believe it was Linn (of course ;-) who first recommended leaving the platter spinning. No problem on the Sondek, as it had a felt mat. But who uses those anymore?! If the platter is acrylic, it obviously could damage the LP surface if spinning during removal. Those of us with threaded clamps have no choice, but I would turn it off anyway, just out of common sense.

I have a threaded clamp on my tnt but I still leave it spinning and use the clamp. I don't feel there is any risk to the vinyl.....