richardkrebs
Responses from richardkrebs
| Eminent Technology ET-2 Tonearm Owners Hi AllI have just finished testing a precision pressure regulator in the air supply for the arm.I replaced a Norgren B07-201-A1KG reg with a Norgren 11-818-101Findings in my rig...,Was there an improvement? Yes. Things were a little clearer, more ... | |
| Vintage DD turntables. Are we living dangerously? HalcroWe have been thru the thermal expansion thing already. As I stated some months back, with an aluminium chassis, the change in spindle to arm distance due to delta temp is very small. Dover is correct, it is no where near a "few millimeters"O... | |
| Vintage DD turntables. Are we living dangerously? RaulWelcome back, we missed you!Beyond core functional test numbers, I do not put a lot of stock into equipment specifications. I prefer to use my ears. As above... We do not listen to specifications.If we did, tube equipment for example, with it... | |
| TECHNICS SP10 MK3 POWER SOURCE / SPEED CONTROLLER Gentle people.I have, had a controller with the voltage selector. I bypassed the selector which was a worthwhile improvement. But obviously, do this at your own risk and put a clear warning note on the rotary switch showing that it is no longer ac... | |
| Vintage DD turntables. Are we living dangerously? Dover.yeah yeah we have all heard ( read ) the arguments extolling the virtues of BD,TD and ID over DD.My point was that a synchronous motor in a thread drive has local error correction and under dynamic loads it is in play (correcting) all of the... | |
| Vintage DD turntables. Are we living dangerously? DoverI have listed the time line of my upgrade development on another thread. There I outlined why I persisted with the SP10. To repeat. It's "drive " is intoxicating. Halcro has used a different descriptor for his TT-101 but he and I agree on the... | |
| Vintage DD turntables. Are we living dangerously? Dover.I heard the Final enough times at Warwick's to get a fix on what it did well and what it did not so well. Hearing it at your place only served to confirm this.re the amazing comment. Under the right circumstances I find my car stereo to be "... | |
| Vintage DD turntables. Are we living dangerously? Dover.You are quite correct. I do not provide any objective proof that the number of servo error corrections have been reduced by my upgrade. However since I know what the upgrade process entails, it is reasonable to conclude that this is indeed t... | |
| TECHNICS SP10 MK3 POWER SOURCE / SPEED CONTROLLER LewGlad that you are enjoying my upgrade.Re a controller for the SP10 MK3The motor unit has all of the infrastructure in place. Commutation and speed sensors.There are a number of quality industrial PMSM controllers that could likely work well. Th... | |
| Vintage DD turntables. Are we living dangerously? Aigenga.re unipivot arms.You raise an interesting point, different arm bearings may well show a difference in the graphs. (Arm geometry may also show difference, as BT argues.) That said, have any of the rigs recently listed by Halcro had unipivot... | |
| Vintage DD turntables. Are we living dangerously? Now that Dover and Halcro seem to have made up. Can we all agree that the spikes in the sine waves from the raw data are actually showing speed changes, W&F?Secondly, as a family, TTs with tight speed correction tend to show greater aggressive... | |
| Eminent Technology ET-2 Tonearm Owners PegasusI may have missed it, but have you made twisted pairs with your naked wire runs?Cheers | |
| Vintage DD turntables. Are we living dangerously? Halcro.Perhaps you misinterpreted my last post.When I said "perfect speed" I did not mean "perfectly centered". A real world test record, which is off centre, produces the sine wave. Speed errors are superimposed on this sine wave, as Markus says... | |
| Vintage DD turntables. Are we living dangerously? Halcro.The explanation from Marcus confirms my comments re the 14 speed changes in the first revolution.Here is the relevant sentence..."That's what the spikes are coming from: it's a superposition of eccentricity and "real" WOW and flutter."The r... | |
| Vintage DD turntables. Are we living dangerously? Dover.Yes "removing the counterweight" would result in a dramatic degradation of the sound!As to increasing the horizontal mass of my arm by 300%. One needs to specify at what horizontal frequency this measurement is taken.At 0.55Hz (eccentric rec... |