Broadwood And Sons questions

John Delacour JD at Pianomaker.co.uk
Thu Jan 10 02:10:29 MST 2008


At 22:42 -0800 9/1/08, Jurgen Goering wrote:

>...Damping usually can be improved a bit by adjusting the lift 
>wires.  Just as with any upright, the dampers should not be lifting 
>before the hammer is half way to the string.

Sure, but if the dampers have settled into the string with the result 
that the lift wire dollies are sitting on the levers, the way to get 
them right is to re-crank the damper-head wires and NOT to screw up 
the long wires, which would be equivalent to bending out all the 
spoons on an under-damper instead of bending the wires.  As the 
damper felt gets flattened with time and use, the damper not only 
adopts the wrong angle to the strings but also adopts a significantly 
higher position on the strings.  By bending the vertical leg of the 
L-wire forward and the horizontal leg down, you remedy both these 
defects and the long lift wire rises to the right position above the 
lever; in fact the achievement of this result is the test that you 
have got the bending, at leat of the vertical leg of the L, right.

To do things the way you suggest solves neither of the two main 
problems and will create more problems into the bargain, and that's 
supposing that you don't have to resort to a blow-torch to move the 
long wires and break a dozen of them!



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