Eminent Technology ET-2 Tonearm Owners

Consider yourself lucky to have that alignment gauge, Brad. I never had one and had to get creative to set the trajectory.

Re: the queuing problem, did you get the joint pushed back on the spindle far enough?

Dave

Hey Brad,
Also check for obstructions in the airline and nipple feeding the body of the manifold housing.
Dave

It’s always preferable to eliminate obstacles between nipples and the mani folds of our bodies...

Fumbling around (...) with air bearing arms, also of other makes makes things appear simpler than they seem:
It’s simply a question of turning the arm around the mounting hole to get the exact desired travel, as defined by the lift bar. It may look slightly twisted though, but that’s the correct way. (You might correct a bit with pulling the end travel "hood" pushed over the bar... a bit)
But basically the travel is set by turning the arm around the single mounting screw and finding the correct position.
Tangentiality then is set by adjusting the length of the arm, ie. (non) "overhang".
Actually all is very simple.

What’s less obvious is that it is important to have
c) the surface of recordings in average level,
b) the platter and platter bearing level, (maybe with a smidgen of defined tilt toward the motor, both for optimized friction or dynamic behaviour with belt drives) and
a) the arm level. With highly increasing importance:
It’s a) where the setup sensitivity of passive tangential arms differs widely from pivoting arms.
The whole mass of the arm - dynamic and static - pulls sideways with the slightest off-level.
A normal pivoting arm with tilted setup compensates gravity "error" almost completely (with only the tracking force / weight remaining). With dynamically balanced arms it cancels to 100%.

Fortunately the air bearing arm itself is maybe the best measuring device on earth for off-levelness.

Dave,
That's most likely the issue, I'll work on it!

It is my understanding that for proper setup if one imagines (or when using the set-up jig) a straight line from the front edge of the turntable to the back edge and which goes directly through the platter’s spindle, the ET2’s tonearm tube should "intersect" that line at precisely 90 degrees. Assuming that the mounting base was aligned correctly, if one were to "turn(ing) the arm around the mounting hole" it seems to me that the desired geometry would be altered. The problem with the stylus landing inside of the lead-in groove can most easily be solved by moving the cap at the front end of the cuing eccentric ("cuing tube") towards the front so as to give the spindle extra travel distance toward the front before being stopped by the cap as intended. There is a fair amount of adjustability front to back available for this.

frogman,

Completely agree with your point about rotating the tonearm assembly.

Since Brad’s table and arm was already setup when he bought it and knowing that he had removed the joint as part of his cleaning process, I thought it prudent to recommend checking his work there first vs altering the queuing eccentric adjustment.

Dave