Emilg

Hi John, i also ordered your book last year, it's very good and practical. Thanks for the extra 55 hints!

true, i think you also tried the formula/spreadsheet on platetuning.org for predicting B1's and found it did not work very well. However, somehow B1- is affected bij the top and B1+ by the back wasn't it? (or v.v., i always forget) I think (like you also mentioned) they should be around the "right places" and perhaps not too weak or strong. My idea is that A0, CBR, B1- and B-1 just support the lower register and preferably not causing wolfyness. I think you mentioned every mode spreads around 5 semitones?

I think it is not about some absolute pitch, but rather a design parameter where the plate has reached a certain stiffness to weight ratio. When the plates are glued the M5-mode (taptone) will be gone anyway, but there seems to be a relation/correlation between M5 and B1-modes, which are more important.

I have wondered how resins and oils can be acidic, as acidity is defined by H+ ions in aqueous solution. I suppose it's because wood, resins, oils and even air always contain a few % moisture to allow acidic behaviour.

I have seen a few also. One was from a 3/4 with 5 mm thick top and some sort of ridge left in the wood that had to resemble a bass bar. It did not sound like a 3/4 Del Gesu funny enough, could have been the bass bar

Hi Doug, it's more about relative stiffness, so the stiffness with equal dimensions. Higher speed should also give higher stiffness. Would damping play a role in bows? Damping will decrease with age.

I missed that part Searching the archives i found a remark by Bruce Tai: that might be the problem for many of the treatments after short term success...

Thanks ctanzio, so the wood properties would not have changed that much in 100 years. I understand that a fungi treatment can speed up the hemicelluloses breakdown. Some years ago a violin from treated wood beat a Strad in a blind test. I don't know if makers here have experimented with that, but that one is on my todo list

Isn't speed of sound also a measure for stiffness? From wiki on speed of sound: I also thought wood gets more stiff when aging, so a Lucchi reading was probably not the same 100 years ago.

Just trim the sides a bit, it will be ok

i suspect he means sanding some varnish away .. a weak d string has been discussed before, here's one with some more ideas:

Hi David, do you also ship to Europe? (The Netherlands) I would be interested in the del Gesu 1736 and the Bergonzi 1736

I finally struck gold.. First some boiled onion skin, 30 mins ammonia fuming (5%) and a coat of blond shellac .. it really looks like gold.

Glad to hear he is OK! ... so Edi, what exactly was Stradivaris secret?

Looks just like torn out varnish to me, sticking to the bridge feet.. the bridge seems to have had at least different 3 positions in a range of 2cm? I would not go against Jacobs advice, ... but i did sand and shellac such spots on my own violins