Bechstein hammer bore

[John Delacour]

At 15:21 -0800 15/2/08, David Ilvedson wrote:

>How do you measure the angle of the strings?

It can be done with a lath and a plumb-line or pendulum.  The thing I 
use is a bit more elaborate, but that's the principle.  The lath is 
of hardwood about 45mm wide, so it will fit on the top unison, and 
10mm thick and a foot or so long, cut perfectly square.  You have to 
park the piano on the level, of course!

JD