Eminent Technology ET-2 Tonearm Owners
The ET2 gooseneck – the part that connects the armtube to the spindle is made from Carbon Fibre. I asked Bruce about making one in aluminum. It can be done in a special run if there is enough interest. I told him I would find out how many are interested. If you have an interest you can contact me at bcpguy(at)bell(dot)net Cheers |
Dover. If the cartridge does not have a (damped) spring inside, please explain to us what causes the cantiliver to return to its rest position. My discourse on resonant frequency IS the whole point, since the resonant frequency is set by the horizintal mass of the arm plus cartridge AND the cartridge's compliance.( plus some other complications around the systems overall rigidity) The system has a resultant resonant frequency which takes into account the stiffness of the cartridge's suspension. Below this resonant frequency the cartridge is able to move the arms weight, start it and stop it, without cantilever deflection. I do not need to talk to cartridge manufacturers to confirm this. Do the math. Chris, I do not worry at all about playing eccentric records, nor do I worry about hanging my Shelter Harmony on the end of my arm. I have had one cartridge failure in 35 years of this hobby and this was caused by my son using it as a chisel to make a nice tangential groove on a record.( maybe he didn't like my choice in music) The other cartridges have simply faded away after long and fruitful lives. While making some assumptions around the rigidity of the cantilever, wand and goose neck, my spring/weight analogy is valid. Right at the start of my involvement in this thread, I said that my arm had been optimised for low compliance carts. Chris, in doing this I have compromised its versitility regarding cartridge selection. High compliance carts are out. Low compliance carts are individually adjusted using different counter weight shim washers. I made this compromise in the pursuit of sonic performance. |
Ct0517, At CES Franc K. mentioned a horizontal mass of around 100gm for Airline. He said that this worries some pivot arm guys, though in practice is "no big deal" w/r to LF performance. The Airline interests me as well-- incredible fit n' finish. I've read that one of its key advantages is very tight bearing clearance. At the high pressure necessary to float a "hard" captured air bearing of small surface area, this implies a low rate of airflow and thus relatively low turbulence and vibration. Terminator can be mounted on pretty much any turnable. Porting the arm across turntables requires pedestals of varying heights to match the varying distance from a particular arm board to the top of the turntable mat. The pedestal can be ordered with an off-set stud mount that spins to accomodate any existing armboard hole vacated by any pivot arm. I made a DIY brass pedestal with this feature. |
Thekong Thekong – look forward to your impressions of the ET 2.5. Do you know what table it will be going on? I came across this pic in this other thread. Is this still your setup ? http://forum.audiogon.com/cgi-bin/fr.pl?eanlg&1301061425&openflup&16&4#16 Very nice - btw Cheers |
