Eminent Technology ET-2 Tonearm Owners

Regarding changing the cartridge with the air pump on- I made a simple latch that locks the cueing shift to the cueing eccentric when you don't want the arm to move around on you. Using the latch with the pump on when changing cartridges eliminates any wear to the spindle or bearing while also eliminating cartridge damage. The spindle, at least, is hard anodized, but it's good piece of mind to always have the pump running when moving the arm... even the slightest bit.

“when changing cartridges eliminates any wear to the spindle or bearing “

Hi Ketchup.

You can’t put wear on the ET2 spindle or bearing. The spindle can only be damaged by driving over it with your car. Well - I am just joking here of course - but just trying to paint a picture of how indestructible the design is. I realize that moving the spindle back and forth in the manifold feels “very wrong” and “rough” without the pump. It feels like you are damaging something. But you are not hurting anything and actually helping it if you can believe it. You are actually encouraged to do this a little on new arms to help them settle in.
Now by tightening bolts too much you can make parts change shape. Loosening them up and letting the arm relax will fix it. My first ET2 was a little deformed this way from previous owners.

As an update.

I have been on the phone with Bruce. I am sending my 420str to him to listen to. I am hoping to get his impressions here – well if not first hand at least in the 3rd party.

I will be putting my MC back on this weekend after 110 hours no sibilance issues whatsoever with my 420 str. The moment of truth has arrived for me and this little cartridge.

Slaw - good to hear the 420 is sounding good. When you feel you have it sounding as best as possible if at all possible please remove the shim and try to finesse the wires to get the cartridge on without a shim. To compare. The arm tube is CF but the head of it is not. I just realized this the other day. Its a resonance hobby. Adding materials complicates things. I side on the minimalist approach and trying to get it right that way - fewer layers the better - just my opinion.

It would make for a great comparison if you are able to tell us the difference in sound it makes. FWIW - I tried a shim initially - one of those aluminum shims from a headshell on one of the pivot arms. It muddied the highs on my setup.

****When you feel you have it sounding as best as possible if at all possible please remove the shim and try to finesse the wires to get the cartridge on without a shim. To compare. The arm tube is CF but the head of it is not. I just realized this the other day. Its a resonance hobby. Adding materials complicates things. I side on the minimalist approach and trying to get it right that way - fewer layers the better - ****

Ditto!

I look forward to Bruce T's comments!

You can’t put wear on the ET2 spindle or bearing. The spindle can only be damaged by driving over it with your car. I realize that moving the spindle back and forth in the manifold feels “very wrong” and “rough” without the pump. It feels like you are damaging something. But you are not hurting anything and actually helping it if you can believe it. You are actually encouraged to do this a little on new arms to help them settle in.

If the spindle is so indestructible and tough, how can simply moving the spindle with no air benefit? The clearances between the spindle and manifold are set at the factory. You do not want to change the clearances. The arm is ready to go out of the box and requires no additional "fitting" by moving the spindle by the customer. That would be a poor design. I will be happy to eat my words if you can provide some proof that moving the spindle with no air does any good. Did Bruce say this to you?