Ok so I've been thinking up a DIY turntable design to build for my self. Some of the design idea's are questionable and lots of people have said they don't think it will work. The parts that I would have to replace are relatively cheap so I'd like to give it a try. Here are a couple pictures of my rendering so far.
[IMGDEAD]https://i24.photobucket.com/albums/c30/Dougie085/TTbase.jpg[/IMGDEAD]
Just a note the blue line represents where the platter's edge will be in association to the base. Also for some reason Sketchup kind of squares the edges but its actually a circle.
[IMGDEAD]https://i24.photobucket.com/albums/c30/Dougie085/Platterbottom.jpg[/IMGDEAD]
This is the top of the base plate and bottom of the platter. The small holes are for magnets. I understand some people think that this may cause issues with the needle and cause noise issues. I'm aware of this but the magnets I'm going to use aren't extremely strong and the platter is 4" thick. So there is 4" of hardwood between the needle and the magnets. In the center of the base plate there is a pole piece that will hold the platter in place. The platter will have a bearing that will go in the middle that will help reduce friction between the pole and the platter. The pole will extend up and will actually be the center pin for the vinyl it self. Some have expressed concern that there may be ruts between the magnets where it would sort of hang a bit and cause bobbing. I think that the way I have it planned right now it shouldn't be a problem because they are relatively close together. If this does prove to be a problem my idea to fix it is to have a second row of magnets that would be in between the magnets on the first row but further back so there would be no space where there wasn't a magnet. As for the tonearm I'm still undecided, one idea is to buy a Jelco SA-750D (http://www.jelco-ichikawa.co.jp/e_tone_arm.htm). I haven't decided if I want to try and build a tonearm as I'm not sure I can match the quality of something like the Jelco. I'm still looking for ideas for the motor and speed control. I've thought of maybe just gearing it only for 33 1/3 rpm as thats more then likely the only thing I'll ever play on it. So anyone that can offer advice or what not greatly appreciated. If you want to offer criticism I don't mind I've heard a lot of people say they don't think it will work but I'm still willing to try this out. If in fact the magnets don't work I can easily pull them out and add a bearing.
[IMGDEAD]https://i24.photobucket.com/albums/c30/Dougie085/TTbase.jpg[/IMGDEAD]
Just a note the blue line represents where the platter's edge will be in association to the base. Also for some reason Sketchup kind of squares the edges but its actually a circle.
[IMGDEAD]https://i24.photobucket.com/albums/c30/Dougie085/Platterbottom.jpg[/IMGDEAD]
This is the top of the base plate and bottom of the platter. The small holes are for magnets. I understand some people think that this may cause issues with the needle and cause noise issues. I'm aware of this but the magnets I'm going to use aren't extremely strong and the platter is 4" thick. So there is 4" of hardwood between the needle and the magnets. In the center of the base plate there is a pole piece that will hold the platter in place. The platter will have a bearing that will go in the middle that will help reduce friction between the pole and the platter. The pole will extend up and will actually be the center pin for the vinyl it self. Some have expressed concern that there may be ruts between the magnets where it would sort of hang a bit and cause bobbing. I think that the way I have it planned right now it shouldn't be a problem because they are relatively close together. If this does prove to be a problem my idea to fix it is to have a second row of magnets that would be in between the magnets on the first row but further back so there would be no space where there wasn't a magnet. As for the tonearm I'm still undecided, one idea is to buy a Jelco SA-750D (http://www.jelco-ichikawa.co.jp/e_tone_arm.htm). I haven't decided if I want to try and build a tonearm as I'm not sure I can match the quality of something like the Jelco. I'm still looking for ideas for the motor and speed control. I've thought of maybe just gearing it only for 33 1/3 rpm as thats more then likely the only thing I'll ever play on it. So anyone that can offer advice or what not greatly appreciated. If you want to offer criticism I don't mind I've heard a lot of people say they don't think it will work but I'm still willing to try this out. If in fact the magnets don't work I can easily pull them out and add a bearing.