Såg din fråga, hittar inte tråden nu.
Most cartridges have a height of 17mm and if this is the case, then the base of the arm should rest approximately 31mm below the top of the platter surface. If you cartridge height is different you can work out where the base of the arm should be from the preceding figures.
taget från
http://www.nakedresource.com/originlive ... ions.shtml
Dimitri