upster Posted July 11, 2024 Author Posted July 11, 2024 18 hours ago, e83cc said: Firstly he has never said that it ever ran on speed - he said the belt disintegrated. So I checked the net and indeed the thickness of the belt can affect speed - bit of a surprise - effectively I presume the "apparent pulley platter sizes" are increased slightly. Personally I run silk thread on my main TT - no stretch - 26kg platter and can adjust speed from 0-85 on both "33" and "45". I see that the original belt was 1.5mm round. So he should find a belt that meets that spec - there are plenty around - JH Silicon. Decibel/LP Gear and many others. He could try a thread belt ( thin ) and see where that gets him. Wow - no kidding. You are sure the original belt was 1.5mm. then I've probably got a 2-2.5 mm one. I'll see if I can purchase a 1.5 mm belt. That is great news. Thanks
aussievintage Posted July 11, 2024 Posted July 11, 2024 18 minutes ago, upster said: Wow - no kidding. You are sure the original belt was 1.5mm. then I've probably got a 2-2.5 mm one. I'll see if I can purchase a 1.5 mm belt. That is great news. Thanks The belt on one I had was white, and as thin or thinner than that round hat band elastic cord (like this https://www.amazon.com.au/Weddecor-Elastic-Bracelets-Necklaces-Jewellery/dp/B08GHM825D) Maybe you could buy some of this for testing. You'd have to tie a neat knot in it
e83cc Posted July 11, 2024 Posted July 11, 2024 @upster decibel hifi in oz has the 1.5mm belts $45 LP Gear in. the US US$30 plus shipping Both 1.5mm 2
Grant Slack Posted July 11, 2024 Posted July 11, 2024 4 hours ago, upster said: guess I'll try to find a way to measure the thickness of the new belt and see if I can order something a little thinner. At $50 a pop it would be quite an expensive trial-and-error Upster, before spending you could try a cotton thread test, just to see what the speed looks like with something *really* thin... cheers Grant
upster Posted July 11, 2024 Author Posted July 11, 2024 3 hours ago, Grant Slack said: Upster, before spending you could try a cotton thread test, just to see what the speed looks like with something *really* thin... cheers Grant Great idea Grant. I'll give that a go first 1
southern_tango Posted July 11, 2024 Posted July 11, 2024 If you want to try with different diameters of belts, you can try with silicone rubber, that you can buy from specialist seals and gaskets stores. ( I did one for a Connoisseur BD1 ) It is a bit complicated to stick together, I used an old razor blade and did like jig to try to get the ends as clean and perpendicular as possible ( tried to do it about 60 degree but couldn't get both cuts the same. As an example the place I got it is called RENSEAL in Dandenong ,Vic. , you can search for it and will give you and idea to search in your proximity. Clark rubber have some rubber strings that you can try but I prefer silicone rubber as it doesn't dry out as quick as normal rubber ( also a nice touch ,it comes in red)
upster Posted July 13, 2024 Author Posted July 13, 2024 On 9/7/2024 at 9:00 AM, Grant Slack said: One could put several #64 or #109 rubber bands from Officeworks around the platter to experiment with slowing it down. cheers Grant Thanks Grant, though I'm pretty confident that increasing the circumference of the spindle (say with a rubber band) will increase the speed whereas I am trying to decrease the speed. If you take it that one turn of the spindle with circumference c will draw c amount of the drive band past it. So if c is larger, it will mean that more band is drawn through with a turn moving more of the platter around in that same time.
Grant Slack Posted July 13, 2024 Posted July 13, 2024 Agreed. That’s why I said to put some rubber bands on the platter, not the drive pulley. Cheers
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