Welcome to the thread Ha_ha_he_man.
Not a bad moniker :^)
Not a bad moniker :^)
Eminent Technology ET-2 Tonearm Owners
CT0517 I modify my recommendation. It applies to Dover only. RK you have come down too far a path with your Krebs arm. You are truly enjoying it. I would never ask you to do something unless you are curious yourself. If you did pursue it you would need to implement a wiring scheme similar to Frogmans - to be the least intrusive on the ET2 based on your plinth design. Dover is about to reacquaint himself with an ET2 and a sound that is very .. well I really like the word that Spock15 used alot ....persuasive. I am sure his system must have changed in the years that have passed. Cheers |
Richard/John47 thanks for making me curious about the damping trough again. Arrived the in mail one kit from Bruce. This kit reminds me of my flu shot ? I don’t like needles and syringes. But it went on real smooth I think Frogman still has his paddle lifted not touching ? I think SLAW is however still liquified ? Added 1 CC per Bruce’ instructions – paddle just touching. Its been over 8 years for me in using one. Will report back later ... so far pretty good ! Cheers |
Thekong – The answer to your question regarding frequencies impacted by horizontal Fr from Richardkrebs are mostly wrong. It is important that they are addressed. Impact of Fundamental Resonance: 05-20-13: RichardkrebsThis statement is not correct. I quote from Richardkrebs earlier post 05-15-13: RichardkrebsAs you can see Richardkrebs appears to be confused. On the 15/3 he cites Bruce Thigpen as saying that there are phase and amplitude problems at 3 times Fundamental Resonance, then on 20/5 he cites Bruce Thigpen as saying the rise in response is almost zero. Neither of these statements are correct. What Bruce Thigpen actually says on his website is that 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. The other mistake that Richardkrebs continues to make is to use as a reference a graph for a single harmonic oscillator that plucked from Wikipedia. Wikipedia - http://en.wikipedia.org/wiki/Harmonic_oscillator Richardkrebs - http://s1173.photobucket.com/user/CT-993/media/ResonanceGraph_zpsdd78e0f4.png.html?sort=2&o=7 This graph does not represent the forces on the cantilever because the cantilever and cartridge is not a single harmonic oscillator. A cartridge tracking a record groove has a fulcrum point at both ends – the stylus in the groove, about which the cantilever pivots, and the cartridge end of the cantilever which has a suspension. Forces are exerted on BOTH ends of the cantilever. The graph represents a pendulum with only one fulcrum point at one end only. The mathematics that Richardkrebs uses does not apply. 05-20-13: Richardkrebs This assertion is wrong on several fronts. The cantilever deflects. Firstly – the record grooves are cut at 45 degrees. The cantilever deflects. For a moving coil cartridge the cantilever deflection moves the moving coils within a magnetic field. That is how sound is reproduced from a record player. This video shows how RCA Living Stereo stereo playback is achieved. http://www.youtube.com/watch?v=Jq2sjGFvNnM If there is no deflection of the cantilever then Richardkrebs system cannot be producing any sound that resembles music. Secondly, the statement defies physics. I quote Bruce Thigpen directly: Bruce Thigpen Furthermore, Richardkrebs assumption with regard to Bruce Thigpens views on eccentric records are not supported by what Bruce Thigpen actually says in the ET2 manual. 05-20-13: RichardkrebsThis assumption again is just plain wrong. I quote from Bruce Thigpen’s ET website: ET2 Manual page 47 : In summary, Bruce Thigpen is very much of the view that the horizontal effective mass should be kept as low as possible, and the decoupling employed to minimsie fundamental resonant peaks at FR and 3xFR. He has also expressed his view that increasing mass increases distortion, and I quote Bruce Thigpen - Bruce Thigpen: Thekong , I trust this clarifies the queries you raised. |
Utter Nonsense Dover, and I quote you "What Bruce Thigpen actually says on his website .......... 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." It would have been useful if you had done engineering. The peak is at the resonant frequency, not 3x Fr. |