Coffee Phil wrote:If that file doesn't work out for you, I have an AT 770 which is the same machine with in my view a bit less silly name: Mister Disc. We have to find someone who can do a sutiable scan, then send you the file.
I was being a bit silly / trying to be funny, but I know the person who uploaded the model to thingiverse, and the pictures actually are
from my unit
It does work just fine. There's room for some improvement (also depending on the printer and type of plastic used): the sloped part tends to droop. That's why supports are needed for the model and / or tinkering with the settings of the 3D printer in use. I think the person printed the cover for me put some comments in the file (I never actually opened the file posted, but he said he would). He took this as just a nice project to test his printer!
Coffee Phil wrote:
The motor in my Mister Disc does not make noise which is noticable to me. You might open the unit to see if the capstan is rubbing on anything. Also the motor is mounted to a plate which in turn is mounted to the case via grommets which are refered to as dampers in the parts list. You might check the condition of the "dampers".https://www.vinylengine.com/library/audio-technica/at-727-sound-burger.shtml
Thanks, I suspected there's something wrong and I will open it up (when I have the time; this is not my primary turntable, just a nice collectible to own!). I was just wondering since I've checked with a strobodisc (or whatever you call that thing with the pattern for 50 and 60Hz), and I presumed if there was something wrong the rotation speed would be off, which it isn't. I suppose the dampers could cause this or something brushing against something that shouldn't, or perhaps dried out grease in the axle (?); in any case it isn't impeding rotation much, or the unit can compensate for it (since speed is OK).
It also has another issue: the aplification circuit takes some time to "warm up"; it takes 90+ seconds for both channels to give output (the other one is totally silent in the beginning, forgot which one). After this it seems quite OK to my ears, however! I suspect some electrolytic capacitors have dried out or something.EDIT:
Some typos and clarification of my thoughtsEDIT:
It is also worth to mention, that the model was made by measuring the battery compartment hole. We had no original part to measure. The result is quite functional, however! At least the batteries are not falling out