My Systemdek IIX/Moth 1/Stilton modified ATF5 is approx 20 years old, and I have decided to press it into service once again (it has been sat, unused (for a number of reasons, not least being the lack of a phono stage), for many years). I tried it, and it sounded surprisingly OK, given the aforementioned lack of use, and the bearing seems to be running smoothly & quietly (as far as I can tell). However, I noticed some pitch instability, so bought a new belt:-
The new belt is a bit shorter than the original, and once fitted (having cleaned the sub-platter & pulley with IPA), I found some noise and judder upon start-up, followed by the belt riding off the vertical face of the pulley, onto the 'lip' between the 33.3 & 45 settings – does this suggest that it is the incorrect belt, or do I need to use some silicone wax (as mentioned in the manual), because, having been cleaned, there is too much grip? I tried the original belt again, and after the first couple of start-ups (which also had a little bit of noise, but less than the new belt), it seems to run fine i.e. quietly, and on the pulley.
Also, I noticed in the manual that the underside of the platter should be set to 5mm above the plinth, but if I do that, the platter is only just above the motor pulley, which means that you can't get much of a bounce without it hitting the top of the pulley?
Finally, any tips for getting the platter off the spindle – mine seems very reluctant coming off and going back on; in order to get the platter and sub-platter to 'meet' flush with one another, I had to take the sub-platter off and push them together, then fitting both (together) into the bearing.
And help gratefully appreciated.
P.S. what would be the best alignment protractor to use with my combination?