Violin Forum/Message Board

Hi Michael, thanks for that information. It will be a while before I get to the point of laying out and cutting the F holes, this will be a good reference for me.

Question for Michael Darnton. I saw something you had written about how the Cremonese makers position the F holes. I can't find it now. Do you have a link to that?

Well it's been a few days since I posted. I used the software that I got back some time ago to visualize the thickness.

I had kind of planned on something like the Strad maps that I posted earl ...

Curtate cycloids are a close match to the cross arches. The long arch is different. On the back plate it's an arc of a circle with a radius three times the length of the plate, measured from the pi ...

There's probably a reason why parabolic listening devices other things like satalite dishes have smooth curved surfaces but upon reflection (haha good pun) I think it would make my brain hurt so nev ...

After a quick search...
the note E on the music scale has a sound wave length of about 5.2 centimeters. A frequency of 2000 hertz has a wavelength of 1.7 centimeters.
If you wanted to have refl ...

Well I have a three day weekend and hopefully will find time to continue working on the violin. I'm almost finished with the back plate. I need to thin it out some more and then the edge work and th ...

If it is a fake label, whoever did it, did a really good job of it. Very Happy

For the last build, I used this thickness map of an average of 48 Strad backs. This may not have been a good idea since his grads changed over time. Later backs appear to be kind of straight across ...

The reason I asked about the label is that it is almost identical to the H. Amati name on the back of the violin pattern in the National Music Museum.

I thought that if the label was confirmed as a ...

A fresnel lens back plate, what a concept.

Well I was just having some fun with geometry after reading Librum Segreti de Buttegha , translated by Dipper
and also the violin pattern from the Nat ...

Are you French? I only know a few words of French. Je ne parl pa le Francais. Very Happy

Having fun with geometry, It looks interesting but does it mean anything, is any of it important? Who knows what was in the minds of 18th century builders. I need to forget all that stuff and jus ...

Yes I'm trying to make quick progress on this one. The last one took a few years but I only worked on it on weekends when I didn't have anything else to do.

I have a career in IT. But I'm appr ...

I have been reading Librum Segreti de buttegha written sometime in the mid 1700s translated by A. Dipper.
It talks about the axis of focus and how it relates to the curve of the sound plate and th ...