uguntde

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About uguntde

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    https://www.birmingham.ac.uk/staff/profiles/cancer-genomic/gunther-ulrich.aspx

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    Male
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    Birmingham UK
  • Interests
    Science, NMR, string instruments

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  1. uguntde

    Viola - wolf on the F, G string

    I know a cellist who has a great sounding modern cello. On the front there is something that looks like a button, but not to turn it on , but t turn a wolf off. I have experimented on various violas with small pieces of roofing lead, which I stuck to different places of the instrument (or the chinrest, tailpiece, or fingerboard) with double-sided tape to find the place where a little weight would remove or reduce a wolf note. On the viola that I play I kept a little piece of lead under the fingerboard and it is almost gone. This also removes a peculiar wolf on the open A string which is only there when I don't have my hand on the neck. I also found that violas with a big C string sound tend to have a wolf between e and f on the g-string.
  2. uguntde

    Orange violin ID?

  3. uguntde

    A few old violins compared

    I would go for the Guadagnini. But what strikes me most is how similar they are. We hear them of course all through a cheap microprophone which probably twists the tonal spectrum considerably. There is another such video where they mix in a cheap Mirecourt violin into a mix of interesting violins, and it is really not that bad. Interestignly, if you did this with violas the differences would be much greater. There are stylistic differences in violas (full tone vs nasal) that go way beyond a Bostonian vs a Alabama accent .
  4. uguntde

    Viola strings

    I have used the viola Amber for quite a while and never had a broken string.
  5. uguntde

    Speeding up suntanning

    One problem with UV tanning seems ot be that only a surface layer gets tanned. If the surface gets damaged white wood is revealed. Does the tanned layer go deeper if one uses a high power (1000W) lamp?
  6. uguntde

    Viola strings

    I also like Warchal Amber, prefer them over Warchal Brilliant, but they are similar. Warchal Karneol are very different, and I don't like them as much, for my taste they lack brilliance. The new Larsen Virtuoso are worth trying, I heard them on a viola and liked them. Very bright strong sound. The C-G-D match the success of the A.
  7. uguntde

    Violin ID Quiz

    Are the pegs and tail piece original?
  8. uguntde

    Need opinion on possible maker

    A very nice violin. Does it sound nice? Very high pine linings, not willow. And a very interesting way of deep channeling into the corners. Is this typical for any maker? I guess the varnish is not original. It looks massively French polished. The Füssen instruments I have seen all had a higher arching. This arching looks later.
  9. uguntde

    Violin ID Quiz

    Ebay doesn't mean it is not French. A few years a go I met a guy who bought a undoubtedly genuine G Bernardel in a Menesson case for €30 on a flee market. To say whether it is CM one needs to look at the linings (very high), how the f-holes are cut and the famous signature. The varnish for pere is usually brighter. The wood similar, but not exactly the same. I have seen Chinese of good workmanship, usually they don't get the edge as perfect as the French, and the scroll ends too early (how to I describe this better?). Usually they don't sound as good as CM, let alone Gand and / or Bernardel.
  10. uguntde

    Speeding up suntanning

    I think I bought them there, mine are about 100W per tube. The parameters that count are power (in Watts) and the frequency (uva uvb uvc are frequency ranges). There are no slower photons, they all travel with speed of light. But you can have a higher flux density. I tanned wood with this already, got a nice yellow colour within maybe a week. The uvb dries varnish in a few hours. The more expensive ones are 1000W. Higher power will certainly tan wood faster. How strong a lamp do you use? But the result with a box with 2 x 100 or 150W was quite satisfactory. Sorry for having posted it trice. This was an accident.
  11. uguntde

    Speeding up suntanning

    You can find those cheaper: https://www.easy-lightbulbs.com/light-bulbs/uv-lamps/ They are used a lot. UVB is safe, UVC is much more efficient. Sunlight has a lot of UVC in its spectrum, but this light is eye damaging. The process was analysed in great detail: https://www.ncbi.nlm.nih.gov/pubmed/26974579, Full paper is available here https://www.researchgate.net/publication/297647292_Wood_degradation_under_UV_irradiation_A_lignin_characterization It should also make the wood lighter, as mentioned by others, as fungal treatment does. You need a lot of UV light to seriously damage the wood though.
  12. uguntde

    Speeding up suntanning

    You can find those cheaper: https://www.easy-lightbulbs.com/light-bulbs/uv-lamps/ They are used a lot. UVB is safe, UVC is much more efficient. Sunlight has a lot of UVC in its spectrum, but this light is eye damaging. The process was analysed in great detail: https://www.ncbi.nlm.nih.gov/pubmed/26974579, Full paper is available here https://www.researchgate.net/publication/297647292_Wood_degradation_under_UV_irradiation_A_lignin_characterization It should also make the wood lighter, as mentioned by others, as fungal treatment does. You need a lot of UV light to seriously damage the wood though.
  13. uguntde

    Speeding up suntanning

    You can find those cheaper: https://www.easy-lightbulbs.com/light-bulbs/uv-lamps/ They are used a lot. UVB is safe, UVC is much more efficient. Sunlight has a lot of UVC in its spectrum, but this light is eye damaging. The process was analysed in great detail: https://www.ncbi.nlm.nih.gov/pubmed/26974579, Full paper is available here https://www.researchgate.net/publication/297647292_Wood_degradation_under_UV_irradiation_A_lignin_characterization It should also make the wood lighter, as mentioned by others, as fungal treatment does. You need a lot of UV light to seriously damage the wood though.
  14. uguntde

    Viola sizes and measures

    I would say, violas smaller than 16" are easier to play for most players, but usually lack power, especially on the C-string. If one can't play a 16" one should better stay with the violin. I find 16-16 3/8" the golden middle - you also need ot get the rib height right. I have however recently seen some new violas of 15.5" with a great sound. I have personally not seen a single smaller viola that had a desirable sound.
  15. uguntde

    Borax a as a wood stabilizer?

    Borax occurs as a mineral that does not dissolve in water. Chemically it is similar to silicate, as B and Si are neighbours in the periodic system. Silica gel is a porous form of silicates. Boron does however have its very own chemistry due its 3-bonded nature. The Borax that is sold as a liquid which I assume is a boric acid solution. Sand consists of borosilicates, and glass consists of borosilicates. Do you agree?