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Paul McClean

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  1. Just looking to have a satin finish. Hopefully polishing with rottenstone, oil and a felt pad will allow me to get into the low spots that are still shiny
  2. Thanks Goran. I scraped the surface and added a little water to raise the grain followed by sanding but I think I could have sanded more to obtain a better starting surface. I'm think the suggestion by Greg above will work better than the wet and dry sandpaper but also expect I may need another coat of varnish first.
  3. Thank you Greg. I have both Pumice and Rottenstone so can give that a go and alway apply more colour/clear varnish if I go too deep.
  4. My varnishing schedule is as follows: Light sanding with 1200 grit wet and dry in between each oil varnish coat Sealed with gelatine. Light sanding with 1200 grit Water based stain primer coat by Joha 7 coats of oil based colour varnish 2 coats of oil based clear varnish followed by 2500 and 3000 grit with polishing oil Even though I sanded in between varnish coats the final surface is not flat on the front and you will see shiney spots and dull spots after using 3000 grit. I have not tried sanding the back yet as the finish looks much better without sanding. Any advice on how I might improve the finish on the front? The more I sand, the risk of creating lighter lines along the grain.
  5. Thanks David. Appreciate the advice. I like the idea of reducing the weight with a target 'note' to aim for keeping the back a semitone above the front at mode 5. I'll let you know how I get on in few days as I only have an hour or two in the evenings
  6. The back plate is currently 120g. Roughly 2.8mm in upper and lower bouts graduated to 4.8mm in the centre so still meat left for final graduation. Mode 1 106hz Mode 2. 163hz Mode. 5. 363hz Thank you..
  7. The bass bar is now fitted and measures 13mm high at the highest point. Weight 84g Thickness is 2.5mm all over except for f holes where it is 2.8mm, soundpost area 3.1mm and edges 3.0mm. Mode 1 76hz Mode 2 154hz Mode 5 341hz Any thoughts on graduating further to reduce the weight? What would be a reasonable thickness to target for wood of this density without going too far? Target for tap tones?
  8. Thank you David. I have been enjoying your videos and they have helped me tremendously!! I don't have a humidity meter to measure the wood but the air humidity is 61. The spruce I am using was bought in 2011 and it was 3-5 years old when I bought it. It has been stored in a cool dry place since then if that helps. I'll thin the centre down to 2.5mm to match the upper and lower bouts, leaving it at 2.8 around the f holes. The f hole fluting is already done. I'll then proceed to fit the bass bar under slight tension and post an update on the weight and modes.
  9. Just a quick update on progress over the past few week as I hope this thread might help someone else down the line. Thickness is ~2.5 mm in bouts and ~2.7 mm in centre. 2.8mm around f holes and 3.1mm in soundpost area. 3.0mm around edges. f holes are cut and weight is now 80g. (Still heavy but we have established that the wood density is 0.48 above) Mode 1 68Hz Mode 2 137Hz Mode 5 291Hz I'm about to fit the bass bar over the weekend which will raise the modes again. Have you guys any advise on whether or not I should try and graduate any more to reduce the weight further? What would you recommend and are there any pitfalls I should be watching for? The plate is now flexing easily but not floppy.
  10. The thickness just inside the border of the top block platform is 3.5mm graduating quickly to 3mm for about 10mm and then into 2.5mm and n the upper bout. Is 3.5mm ok? I assume it is steep die to the arching on the outside. Thanks for the comments...I'm learning a lot
  11. So I have continued to graduate as suggested above. Both the upper and lower bouts are at 2.5 mm graduating into 3mm in the centre and 3.2mm at the sound post area. The weight is now 82g. I calculated the density at 0.48. Chladni patterns are similar to the above (without the chicken ;). Modes are now as follows: Mode 1 79Hz Mode 2 154Hz Mode 5 334 Hz The plate feels flexible but not floppy, firm but not stiff. Should I continue to graduate further and try to reduce weight more or should I cut the f holes and fit the bass bar?? Would love to hear your suggestions. PS. I play in an orchestra and have had a few professional players try out my first violin and they were impressed by the evenness of tone and playability, but it is heavy and does not project well. My goal is to improve on the first and produce the best tone I can.
  12. I calculated the density from a piece I cut off the wedge before splitting and it is 0.48. With my arching height of 15.7 does that influence the final graduations I should be targeting? Although the wood is dense the tap tones seem lower than expected and I don't think the wood is noticeably stiff.
  13. Here's photos of the front and back along with the arching templates I made based on the Titan 1715. I corrected the symmetry. The arching height is ~ 15.7mm including 4mm for the edges.
  14. Thanks for all the tips above. I was working on the lower bout today graduating to an even 2.7mm. However the weight only dropped by 3g down to 86g. The middle bout is still around 3.2mm and the upper bout 2.8mm so I will work on them next but I think at the rate the weight is dropping I will be lucky to get under 80g even if I graduate to 2.4mm in the upper and lower bouts. I have already marked and fluted the f holes so don't need to worry about leaving extra thickness there. I think the plate is 1 mm too long and 1mm too wide as the overhang is closer to 3mm instead of 2.5 but I was leaving extra for when I work on the edges. I don't think that would attribute to a lot of weight though. So far as contouring the platform at the bottom block do I just do this on the bass side or more on the bass side than treble? I assume the platform at the top block should be left alone for strength? How does this affect the tone? I would love to see a photo if anyone has one.
  15. Really appreciate the feedback so far guys. Looks like I need to drop the weight by at least 19g. Do you think that is achievable ok given I'm currently at 2.9mm in the upper and lower bouts and 3.3mm in the middle? How thin should I target? Also, the edges inside the gluing platform are 3.5mm. It is difficult to thin here without producing a steep concave slope. Any advice on the thickness I should target? The thickness at the purfling is 3.5mm and 4mm at the edge so fluting is quite shallow.
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