Ortofon cartridge alignment protractor:
An alignment protractor is used to find the correct distance from stylus tip to tonearm pivot.
When aligning a cartridge for tangency using the alignment protractor, it is essential to remember that you are attempting to align the cantilever (and, hence, the stylus), not the cartridge body. There is no guarantee that the cantilever is perfectly aligned within the cartridge body, so simply aligning the cartridge body will not necessarily produce the desired result.
Furthermore, many cartridge bodies have non-parallel sides, making tangential alignment of the cartridge body with the lines of tangency on the gauge virtually impossible.
An alignment protractor is a plastic template onto which are printed the null point(s) and lines of tangency against which the cartridge should be aligned. The template is placed over the turntable's spindle (made possible via a spindle-sized hole drilled in the template) and placed against the platter.
Cartridge must be adjusted until the cantilever is parallel to the set of parallel lines. And this should be achieved for both the indicated points. When the cartridge's longitudinal axis is parallel with the horisontal lines, tracking error will be at a minimum.
Stylus pressure gauge/scale:
The Ortofon tracking force gauge is a simple budget tool for turntables that is used to determine the stylus tracking force.
The tracking force is the downward pressure that is applied by the weight of the tonearm through the cartridge stylus and onto the vinyl record. It is important to set the proper tracking force in order to maximize the playback performance and to reduce the risk of mistracking or causing excessive record wear.
Check for the manufacturers recommended settings for your stylus tracking force. The Ortofon tracking force gauge tool is a small plastic pivot type scale that will accurately measure tracking force between 1.25g and 4g.
The Ortofon Libelle for setting your turntable and accurate mount level measurement
Thakker phono alignment set
Ortofon cartridge alignment protractor
Ortofon stylus pressure gauge/scale