richardkrebs
Responses from richardkrebs
| Eminent Technology ET-2 Tonearm Owners Chris and others. I can see how our discussion has become tedious for other readers. I apologize for this and will be more considerate moving forward. On a bit of a side path. What happens when a new better piece of gear is installed, say new spea... | |
| Eminent Technology ET-2 Tonearm Owners Dover says."....on an undamped standard ET with decoupled counterweight there is a resonant peak at 3 times the fundamental resonant frequency, and that this is reduced with fluid damping on a standard ET with decoupled counterweight."I say."At 3x... | |
| Eminent Technology ET-2 Tonearm Owners Thekong.The answer to your question regarding frequencies impacted by horizontal Fr is shown in the attached graph.From memory your Horiziontal Fr was around 5hz with the A-90. So substitute 5 for 1 on the x axis and scale up from there. At 15 Hz ... | |
| Eminent Technology ET-2 Tonearm Owners Dover.- The error you repeat, is saying that my arm exhibits a rise in bass response of 6-12db. I'm pretty sure that most of the readers here would not call 5Hz bass. I can't hear that frequency and my system certainly cannot reproduce it. The arm... | |
| Eminent Technology ET-2 Tonearm Owners Chris.Brilliant test idea you used for checking the smoothness of the pump air flow. I smoked my current pump running it at a higher pressure. Will definately be trying your idea out when it's replacement arrives. | |
| Eminent Technology ET-2 Tonearm Owners DoverI do wish you would stop repeating your fundamental error ad nauseum. BT measured a rise in response of 6-12 db at the resonant frequency. Say 3 to 8 hz. I don't call these frequencies bass.Bruce measurements show that this rise in response i... | |
| Eminent Technology ET-2 Tonearm Owners Dover.Secondary resonance? You mentioned this twice in your post 05-15-13. The frequency numbers you used were 3x Fr for this. The 3x Fr figure is the multiplier used by BT where he considers the amplitiude and phase anomolies above Fr have fallen... | |
| Eminent Technology ET-2 Tonearm Owners Dover.My calculation of weight delta was based on how much weight the air bearing has to carry. Not the horizontal effective mass. You voiced concern that I had taken it outside its load carrying capability. My calculation is correct since the bea... | |
| Eminent Technology ET-2 Tonearm Owners ChrisThe statement about the ET2 bearing was in relation to it being subject to the same rules regarding resonance , load carrying capability dynamic stiffness etc. Any problems due to higher mass will manifest themselves in linear air bearing des... | |
| Eminent Technology ET-2 Tonearm Owners The horizontal effective mass for a linear air bearing arm is the sum of the mass of the bits that move sideways.The ET2 reduces this mass by decoupling the counterweight. We all clearly understand this design feature. The benefit of this approach... | |
| Eminent Technology ET-2 Tonearm Owners Thekong.It should be no surprise that the arm weighs in at that figure or even higher with the heavier counterweights. It is neccessary for it to perform well with low compliance carts. This provided that appropriate damping is applied. Lead out w... | |
| Eminent Technology ET-2 Tonearm Owners Thekong.It will be interesting to read about your findings. Do you have the horizontal effective mass figure for the 6000? Can you please post this if you have it. My experience with adding weight is that you should be targeting a horiz resonance ... | |
| Eminent Technology ET-2 Tonearm Owners My apologies in advance if this topic has already been covered in the thread. Too many posts to read thru.Twenty years ago I made a oil damping trough for the then standard ET2, mounted on a Goldmund Studio. Mixed results, which could have been as... | |
| Eminent Technology ET-2 Tonearm Owners Chris.Good to read your findings on the gooseneck. They parallel what I heard when making the change here. You can expect more of the same when we find a way to bypass the o'rings in the manifold, along with a satisfying jump in dynamic contrast a... | |
| Eminent Technology ET-2 Tonearm Owners Chris.Glad that you like the aluminium goose neck. I designed it to be as stiff as possible. The tighter fit into the wand and spindle is deliberate. Also it is made from the same grade of aluminium as the spindle, 6061 T6. This to minimise the di... |