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Petros - Posted - 09/20/2023: 08:34:23
First thanks for all the great info and comments from you all!
I was so pleased with my first "Regalstein" creation I'm doing surgery on another one a big body 15" lower bout 3 3/4" thick and a sound well. My question is about the rim the cone sits on. The worker who put the well put it in off center. I noticed that a beard legend (or any cone?) seems to sit only at the very edge of the cone and then there's a curved part past the lip that does not sit. The rim on this reso in one spot is thicker and might be touching more of the cone lip than usual and then the other part of the rim is thin and I'm going to add some veneer wood there to make it thicker but do you think that too wide rim part will interfere with the one vibration? Any help is much appreciated!
PS I only have a Dremel a wood file and a hole saw to use
hlpdobro - Posted - 09/20/2023: 09:35:25
I'll assume that the top's hole is not actually off center.
If not, you have no choice but to add material to the "shelf".
I'll add that if the soundwell is indeed off center, once set up and under tension, you run the real risk of the cone & bridge being out of line with the neck, nut & tailpiece.
Assuming that they are actually in line.
You did check this..Yes?
h
Petros - Posted - 09/21/2023: 11:48:58
Thanks for the comment. Good point. Before I began surgery it was all strung up and playing nicely (just not as open as I wanted) bridge looked pretty good I think I had to adjust the spider a tad nothing much. But now I'll take a ruler and measure carefully after my glue dries I'm putting in some bracing and 2 sound posts. If the sound well is off center it's no more than 1/8 3/16" range
Edited by - Petros on 09/21/2023 11:54:11
daver - Posted - 09/22/2023: 09:59:18
Hard to tell from the pictures, but it looks like the soundwell ledge has more exposure near the fingerboard than near the tailpiece. Is this correct?
Can you share the diameter of the cone opening at the top, and the ledge measurement at the largest and smallest exposure? That might help a bit in diagnosis and suggested fixes.
Edited by - daver on 09/22/2023 09:59:43
Petros - Posted - 09/22/2023: 21:29:20
quote:
Originally posted by daver
Hard to tell from the pictures, but it looks like the soundwell ledge has more exposure near the fingerboard than near the tailpiece. Is this correct?
Can you share the diameter of the cone opening at the top, and the ledge measurement at the largest and smallest exposure? That might help a bit in diagnosis and suggested fixes.
Thanks for the input. The cut out seems round it's 10.5" on four quadrant points on the x and y axis running through the center of the opening. I do believe the soundwell was glued in off center. The ledge close to the neck has tiny tad more than 1/4" and at the tail piece end 1/8" so pretty big difference.
I'm taking veneer pieces (the iron on kind) and ironing strips face to face to make a nice solid piece and taking two of those maybe 3 and will glue them on the tail end then sand down hopefully to be perfectly level with the actual sound well rim. The photos are not glued yet just bending the pieces overnight and will adjust carefully to match the ledge and sand down any high spots...
Petros - Posted - 09/23/2023: 11:49:23
Next step is looking good veneer strips glued in (I'm posting progress in case it turns out well and someone else wants to try it)
daver - Posted - 09/24/2023: 08:41:00
quote:
Originally posted by Petros
quote:
Originally posted by daver
Hard to tell from the pictures, but it looks like the soundwell ledge has more exposure near the fingerboard than near the tailpiece. Is this correct?
Can you share the diameter of the cone opening at the top, and the ledge measurement at the largest and smallest exposure? That might help a bit in diagnosis and suggested fixes.
Thanks for the input. The cut out seems round it's 10.5" on four quadrant points on the x and y axis running through the center of the opening. I do believe the soundwell was glued in off center. The ledge close to the neck has tiny tad more than 1/4" and at the tail piece end 1/8" so pretty big difference.
I'm taking veneer pieces (the iron on kind) and ironing strips face to face to make a nice solid piece and taking two of those maybe 3 and will glue them on the tail end then sand down hopefully to be perfectly level with the actual sound well rim. The photos are not glued yet just bending the pieces overnight and will adjust carefully to match the ledge and sand down any high spots...
Your measurements do indicate the soundwell was assembled too far toward the tailpiece. A centered soundwell would provide about 3/16" reveal all the way around.
The cone opening measurement indicates another issue. 10.5 inches is just enough for "older" or "import" cones (and perhaps enough for the original cone if you are not planning to upgrade), but almost all modern cone replacements (Beard, Scheerhorn, most Quarterman and Replogle) are 10-9/16 inches. Using one of these would result in an interference fit (with drastic tone implications) unless either the cone is trimmed to fit, or the cone opening is routed to accommodate. Incidentally, though the veneering that you're adding is a creative solution and will tend to even out the reveal, it doesn't address the cone opening issue.
If you are planning to upgrade and want a drop-in replacement, your choice will be limited to the Replogle “Standard 10 1/2″ D15 cone (update: These are currently out of stock). The ever elusive Quarterman Res-O-Cone QD-1/10 is almost never available, and any import cone that fits will most likely not be an upgrade.
Good luck on your project!
Petros - Posted - 09/24/2023: 09:00:47
Your measurements do indicate the soundwell was assembled too far toward the tailpiece. A centered soundwell would provide about 3/16" reveal all the way around.
The cone opening measurement indicates another issue. 10.5 inches is just enough for "older" or "import" cones (and perhaps enough for the original cone if you are not planning to upgrade), but almost all modern cone replacements (Beard, Scheerhorn, most Quarterman and Replogle) are 10-9/16 inches. Using one of these would result in an interference fit (with drastic tone implications) unless either the cone is trimmed to fit, or the cone opening is routed to accommodate. Good luck on your project!
Great info. I had a Legen cone I got from Rob Ickes and indeed it did not quite fit so I trimmed it very slightly (and marked the center) and found it needed to be trimmed not evenly around but only in certain areas (so the hole is not 100% round but very close like 1/32-1/16" close to round not bad for an import). After trim it did fit and I had it set up and playing very well prior to disassembling sounded like a GT PB! After doing the Dr. Regalstein soundwell operation, I'm sanding the veneer rim additions now to get it as even as possible don't have a router so it'll be a bit off. I'll report when it's done I'm away for a week starting tomorrow. But thanks I appreciate the comments on the veneer, it worked really well and was at an advanced beginner level of difficulty.
