richardkrebs
Responses from richardkrebs
| Vintage DD turntables. Are we living dangerously? Jmowbray.More information on the upgrade is available on my web site. The procedure is now available for the SL-1200 series. Please PM me or contact me via my Krebsupgrade web site for a detailed description. cheers. | |
| Vintage DD turntables. Are we living dangerously? Dover.The essence of an I beam and ply is the separation of the two outer layers (sheets). Any bending causes compression of one sheet and tension in the other. This increases the stiffness of the structure. As I said earlier. It is a 25 year old ... | |
| Vintage DD turntables. Are we living dangerously? Dover.The figure I used for Aluminium is a generic number we use for calcs here. If we want to be more precise we take into account the method of forming the material and of course the specific alloy. I did say "around 0.04mm" The point I was maki... | |
| Vintage DD turntables. Are we living dangerously? Fleib.I think that we have done this subject to death. Let's agree to differ and move on to some other topic?BTW, apologies for misspelling your moniker. Big fingers, small keyboard. Cheers. | |
| Vintage DD turntables. Are we living dangerously? Fkeib. I agree, 100% torque conversion is not possible.That is why I listed this assumption..."TDs motor only provides enough torque to maintain original speed before stylus is lowered, after it is lowered." I have assumed that the motor plays no ... | |
| Vintage DD turntables. Are we living dangerously? Halcro.Lighten up, this is just a friendly discussion.Cheers. | |
| Vintage DD turntables. Are we living dangerously? Fleib.The TT in question has a very powerful motor, capable of rapidly accelerating the platter.I agree, 8 microns is tiny and this subject is tired.cheers. | |
| Vintage DD turntables. Are we living dangerously? Halcro.You accept without question that a stylus can slow a 22kg platter. This, while said platter is being driven by a substantial motor. Why can't you accept that a lighter structure can be rocked on its feet by the SAME applied force, which now... | |
| Vintage DD turntables. Are we living dangerously? Totem.I first posted this on another thread.Here updated for relevance.... To me it is obvious that a pod will move due to Stylus drag. The question is how much.In order to calculate this I needed a figure for stylus drag. A search on the web prov... | |
| Vintage DD turntables. Are we living dangerously? The linear temperature coefficient of expansion of Aluminium is 0.000023m/m degrees C and is indeed approx. double that of steel.Using this figure on a LO7D and assuming a 5 degree C delta, we get a change in distance to spindle of around 0.04mm. ... | |
| Vintage DD turntables. Are we living dangerously? PrysoMy upgrade concentrates on making the motor and speed sensor do what the designer intended them to do. As designed and as built are two entirely different things. All the Kings horses cannot put back together what is broken in the drive. The ... | |
| Skeletal vs Plinth style turntables Parrotbee.Really look forward to seeing pics of your TT creation.There are so many ways to build a TT, all with virtues and compromises. The art, I guess, is maximising the virtues and minimising the compromises. | |
| Skeletal vs Plinth style turntables While waiting for Halcro to answer Lew's question in his post of 02-13-15, I thought it might to be interesting to look at the pod movement thing from another angle. To me it is obvious that it will move due to Stylus drag. The question is how muc... | |
| Vintage DD turntables. Are we living dangerously? Schubert.Ah yes. For me it was the SR-929.A work of visual art. | |
| Skeletal vs Plinth style turntables Chris.We all have songs lurking in our past that in some way stay with us.Re the number crunching. The figure given was for a perfectly inelastic collision. If the collision was perfectly elastic the new train speed would be around 99.99996 KPH. 0... |