Tom Fid

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About Tom Fid

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  1. Cool. I don't have any ebony stock, so I 3D printed some pins - they work well. Hopefully Chanot will approve of the modernity until I replace them.
  2. I don't know exactly how a guitar bridge works, but the Chanot setup seems slightly different. It has two slotted ebony plates, one inside the body and one outside. So, most of the string tension is carried on the inner plate slot, which is under tension against the inside of the body. The holes through the top plate are teardrop-shaped, so the string doesn't really bear on it directly. If the string slips out of its slot in the inner plate, it's in tension against the outer plate, which could easily peel right off (we almost discovered that the hard way). So, the job of the pin seems to be to keep the string from escaping its slot, but once things are under tension, it doesn't have much of a mechanical role.
  3. Bingo. The holes aren't as clean as a guitar bridge, and there are string slots so the pins don't need slots, but I'd say that's the right idea.
  4. After some experimentation, I believe this is correct. They'll stay in place under tension, but it's very easy for them to walk out of their slots when tuning, messing with the bridge, etc. I've made some prototype pins as an experiment, but I'd be really interested to hear if anyone knows what they're really supposed to look like. My initial design was too clever - essentially a cylinder with a slight lip and split tip, like an auto panel plug. In hindsight, a dumb idea, because that would be tough to make in ebony with hand tools. I think they must be more like tuning pegs - tapered, and sized carefully so that they sit at the right height.
  5. I've seen this seller offer quite a few instruments that look genuinely old and interesting, but have dubious provenance. Yeah, maybe it is what it says. Maybe the guy on the street corner is selling real Rolexes, too. I wouldn't count on it. (Note that they make no promises in the listing.) Lets say you get lucky and it cleans up well, and plays nicely. Now look at it how a prospective buyer will: they can get a top modern factory instrument for under $10k - that's the competition. They squint at yours and wonder where it came from. Then they cut the price in half for the top crack, and in half again, for the back crack. That's what you might hope for. I think it would be a fun project if you have no expectations, but I'd be looking to start such an experiment at a tenth of the investment in this auction.
  6. Hard to say just seeing the back, but my immediate reaction is that this is high risk. I don't think those back cracks are easy repairs, and how it'll sound is anyone's guess. Why not sell your existing cello, and use the proceeds plus the 2200 to upgrade?
  7. Like most university press releases, this is a little over the top: https://today.tamu.edu/2019/03/05/new-violin-design-could-change-the-instrument-forever/ (In The Strad as "Examining the acoustic properties of fingerboards made from different materials.") Breakthrough, or just "gone emeritus" science?
  8. I saw this on Invaluable or Liveauctioneers and was curious too. If you look at the label, I think they've misread it. It's "Cesare Airaghi." However, this is not "yellow-brown" varnish. He's mentioned in some old works, like this and this. However, this site thinks he doesn't exist.
  9. I think there's a lot of miscommunication here. Verbal argument about complex physics is often unhelpful, and non-native English compounds the challenges. Probably more modeling, or practical knowledge from trial and error, and less ridicule, would be appropriate. Like this: http://violin-analysis.com/om.html (no idea how well done, however).
  10. Are you proposing, instead, that the top of the violin moves up in response to downward pressure from the bridge? That would be some pretty interesting physics. Is spruce a previously-unknown metamaterial? The Savart trapezoidal violins are flat on the inside and only slightly arched on the outside. Evidently the bassbar and soundpost provide enough support for the top, though I've seen it asserted that they didn't last.
  11. It went for more than double the estimate - $2100, with 7 distinct bidders. Interesting. https://t2-auctions.com/auctions/lot/?csid=2199011328&cpid=3532324864&filter_key=
  12. I bought my son one so he could take it backpacking. It does serve that purpose, and it has a reasonable set up, per the Fein review. But: This unfortunately is also true. I think Glasser is overbuilding them. Seems like lamination wouldn't get you much structurally unless you vary the direction, though it wouldn't have to be 90 degrees.
  13. Here you go: #657 is the top, showing also the ivory lining in the f-hole (c-hole?). #659 is the back, showing what I assume to be repair work, where the original ebony has been replaced with stained something that is no longer as dark. #660 is the same with ruler for scale. This and previous are from roughly a 45 degree angle, so you're seeing the back (lower left) and rib (upper right). #661 is same location, but straight on from the back. It looks like the edge is built up of four strips: a thin ebony, thin ivory, thicker ebony, then a rounded ebony corner piece.