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I want to raise the reproducer of my Edisonic Schubert slightly, as the limit pin doesn't have quite enough vertical clearance for some un-flat discs. I've loosened the set screw at the bottom of the suspension rod (red circle in photo below), but the threaded projection doesn't want to turn in either direction. Do I also need to loosen one or more of the screws at the top? If so, which one(s)? I've circled the candidates with color coding in the last photo. Thanks for any help!

From the Edison Disc Motor manual, scanned by David and posted here in 2009. I don't think the design changed much for the Edisonics. I recall using this procedure on a Schubert, but it was a number of years ago. You want to loosen all three square-head screws--the one on the bottom, which you did, and also the the two on the top collar. The only issue is the "horn pivot screw (4)." Checking my other DD machines, there is no screw here. Like I said, it's been a while so I don't recall how I did it, but I hope this helps you figure it out. Someone please chime in with more details.
If the height of the reproducer is not correct, it should be adjusted as follows:

Loosen the two upper set screws (1) and (2) and the lower set screw (3). Draw the lift shaft (5) out about ⅛ of an inch, by means of the lifting handle (6) and tighten set screws (1) and (2) in the order named, so that lift rod will be firm when this adjustment is being made.
Adjust the height of the reproducer by means of horn pivot screw (4), turning to the left to raise and right to lower, until the height is correct, as indicated by position of the limit pin.

Tighten lower set screw (3), loosen set screws (1) and (2) and slip a piece of paper about the thickness of an ordinary visiting card beneath the automatic stop arm (9) and push the lift rod (5) down as far as it will go.
Tighten set screws (1) and (2) and remove paper. This assures free movement
of the automatic stop arm.

The only issue is the "horn pivot screw (4)."

You need a small rod to put in the hole and use this to turn the horn pivot screw (4).
The thread goes up into the rod (5) above so you need to turn to the left to unscrew it a bit and push rod (5) upwards.

good luck
Robin

Thanks to you both! The reproducer is now duly raised about 1/16", and that makes all the difference. I never did get the pivot screw to turn (I inserted a no. 0 Phillips head screwdriver shaft as a lever); apparently it is frozen pretty solid. It still rides in its socket, however, and the set screws apparently suffice to hold up the mechanism, so all is good.

Glad you were able to raise it. I guess the "horn pivot screw" is the threaded rod itself with the hole, not an actual screw, per se. I think I did the same, not bothering to turn it, but securing it up a bit with the set screws.

Hi David and other friends here --

I found this TMF string as last night I was struggling to adjust the same set screw on my B-19 ("Chalet" or "Bungalow") Edison disc phono, which I keep on my work bench out in the garage. When in place at the bottom of its post (which David calls the "suspension rod") I too could not budge it in the least. So this morning I disassembled the phono enough to get the horn assembly out and then take it with me to work so that I could fuss with it there.

First thing I did was liberally douse the bottom of the post (with set screw still in place) with WD-40 and let it sit for a while. On my lunch hour I went back to it and then put the shank of a small screw driver into the set screw's hole--and pushed (and hoped!). Luckily it moved, and after working it a bit (and applying more WD-40) I got it out of the post (see attached). It's a tad longer than 1 ¾" (1.75").

Once out I sprayed the set screw repeatedly with WD-40, each time wrapping my thumb with a paper towel and then running my thumbnail through all the grooves to remove gunk. After that I then re-inserted it into the post (which I had also doused with WD-40) multiple times to pull as much gunk out of THOSE threads as possible.

End result: I can now advance (and retract) the set screw in the post with my bare fingers, so it's good to go! (though I know that once the phono is reassembled I will have to revert to using the screwdriver shaft for adjustments as the screw will again be bearing weight and in a tight corner).

Mindy P.

P.S. I had to fuss with getting that set screw to work as my problem was the opposite of David's--my reproducer was riding too high and the limit pin was hitting the bottom sides of the limit loop. Adjusting the three square screws (at top and bottom of the post) would not help with that problem as the set screw was already pressing into the very bottom of that little "anchor cup" (my term for it) that's fixed into the bottom of the cabinet--and the only other alternative was to remove the cup, sand down part of the bottom of the cabinet, and then reinstall the cup. But now that's not necessary. : )

Again, here's a photo of the little bugger--which I've never seen online before.