richardkrebs
Responses from richardkrebs
| 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... | |
| Vintage DD turntables. Are we living dangerously? Fleib.The error resulting from record eccentricity is surprising.Take a small 0.5mm eccentricity on a 100mm radius and we get around a 1% error. (The tracking radius makes a difference)Nakamichi were on to something way back then. | |
| Vintage DD turntables. Are we living dangerously? Halcro.The TT-101 is a machine, a thing, nothing more. It, like all machines, is far from perfection. My objective comments, made as a result of properly interrogating all of the Feikert test data you provided, are in no way a reflection on its ow... | |
| Vintage DD turntables. Are we living dangerously? HalcroLook at the raw trace for the WE8000.Start at the first lower min freq, just above 3130 hz. Other than the max at around 3164hz, count every sharp change in direction until immediately before the next min of around 3130 hz again.I count 14. ... | |
| Vintage DD turntables. Are we living dangerously? HalcroThe Wilson does have speed feedback, don't know about the George.If you look at the George's raw trace, even though it is all over the place, it is quite smooth in comparison to the others and approximates a sine wave. This would imply a dif... | |
| Vintage DD turntables. Are we living dangerously? Halcro.Thanks for the tests. Do you have the companion numbers for each arm?I was interested in any consistent differences between the arms/carts, which could go some way to validating BT's ideas. There was nothing else in my request. As for Dover... | |
| Vintage DD turntables. Are we living dangerously? Fleib.Copied here the reference to wow and flutter from the ET2 Dampening trough owners manual.Food for thought. "WOW AND FLUTTERWow and flutter, FM distortion and surface irregularities in the LP should all be groupedtogether because, as we will ... | |
| Vintage DD turntables. Are we living dangerously? Halcro.I re-read my last post and realise that it could be misinterpreted. Clarification here...BT suggests that when accessing speed accuracy with a pivoted arm, the measured performance is inferior to the actual performance. This due to the geom... | |
| Vintage DD turntables. Are we living dangerously? Halcro.In the manual of the ET2 Bruce Thigpen claims that a pivoted arm contributes to wow and flutter due to its geometry. The TT-101 has exceptional figures in this area.Since you have a rig with 3 arms, it would be interesting to run 3 consecut... | |
| Nude Turntable Project HalcroHave you tried testing the resonance characteristics of the granite pipe?The material does have a tendancy to ring like a bell.Also by "identically situated" do you mean that you placed the Raven at the same place on the shelf as previously ... | |
| Nude Turntable Project HalcroIs there a secondary issue here?" ..a low frequency drone begins and then increases in volume.."Could there be acoustic feedback following the initial EMR problem?Cheers |