Eminent Technology ET-2 Tonearm Owners

I discovered a limitation of the long I Beam with really light cartridges.

I’ve made an earnest attempt to get through some of my collection of unplayed records the last couple of weeks. Decided a couple of days ago to start using Room 2, to trial records and mark the ones for play in Room 1. I still have the Acutex 420 str mounted on an ET 2.0 HP with aluminum armtube in room 2 on an SP10 MKII.

With just the base ET2 weight on there that fits into the groove of the clamp, I can’t get past the midpoint on the new long I Beam. Physics.
The cartridge is just too light.

So I contacted Bruce and he told me this is something new, and the good thing is he is going to have a lighter version of the base weight made to accommodate the longer I Beam. For those of you running at say 3/4 on the I beam - this may get to the end of the plank. I think I recall Harry modding his base weight to get to the end of the I Beam - but not sure.
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Good record playing weather.

Cheers

Chris, thanks for that as I'll be using the same cartridge when I get my ET back in play.

Once more am I in need of the knowledge of this community

I have decided to change turntable. My trusted TD125 is going into retirement and a Micro Seiki RX/RY/RS/RW 1500 is going to take over the job.
This is raising some issues. I'm now in need of some sort of drawing for a armboard to mounts the ET2.5 on.
I have access to knowledge and equipment to making the board board. (CDC -)) I even have it options to make it from whatever material that is optimal I guess titanium is a bit overkill. LOL

I've seen this done before on pictures I'm not sure which armboard that's been used. I have an option to use both one or two posts. I'm suspecting to post board will be the best 
My plan is to mounts and acrylic shield on the backside. 

I don't have access to special mounting tool (the Jigg) 
So if anybody have control over the geometric positioning that will be of great help
Also Interesting in hearing what kind of mounting, what kind of material that will be the best.
 I'm planning to put two more arms on so this is going to be a tree arm rigged Rx-1500 ;-)))))))))))))))))

Styrk

Styrk
is there a reason that you are not using an existing post with armboard on the RX 1500?

The ET 2.5 mounting plate spikes form a triangle that is larger than the hole in the armboard. So the armboard can be used. All that is needed is a longer mounting bolt, thick Fender washer and locking nylon bolt. All Stainless Steel, from the bolts store.

I have only ever used the straight line jig anywhere on the platter, to mount the ET tonearm. Pivoting armboards make this very easy. For a full plinth TT put the assembled tonearm on the plinth without spikes. One person holds and adjusts the positioning of ET tonearm, while the other person positions the straight line jig which is hooked on the spindle. Once the cart lines up - use painters tape around the mounting plate - on three sides You’re done.

As long as your Cartridge "Walks the Line".

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As far as dimensions for reference.

If you download the ET 2 Manual Pt. 2 from Bruce’ website - at the end are some mounting dimensions for Sota,Oracle and VPI.

Chris

In the end it's only a question of the correct mounting distance of the central mounting screw. Everything else can be adjusted by rotating the base around the central mounting screw, although it might look "non straight"... ;-)
Moderate arm length adjustments can still be made on the arm itself if necessary. Eg. to place the three base spikes more in the center of the arm board, not too close to the armboard edges.
The distance is 210.96mm if you have digital drill-fingers :-)