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<DIV><FONT face=Arial size=2>I am replacing hammers in an old upright. I have a
concern regarding hammer weights and how they follow (or rather don't follow)
the Stanwood curves. I have used Stanwood curves in the past to weigh off
upright hammers for tonal purposes - I realize it affects touchweight
minimally - although it does affect the inertia portion of
touchweight.</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>I have purchased a set of Isaac Credenza hammers
for the piano. SW for the A0 is about 10.8g - right in the lower end of the
midsection of Stanwood's curves, and probably about right for a smallish piano
(52"). SW with the Isaac C88 is 6.9g - right at the most extreme heavy treble
hammer on the Stanwood curves. I presume reducing treble hammer weight will
provide better tone for the piano (maybe not - I guess a 9-foot grand has a
similar speaking length?). As you can see in the picture below, the original C88
core is a lot smaller than the Isaac - 1.7g compared to 2.9g. If the new C88
hammer had a core like the original, that hammer weight would fall in about the
middle of the Stanwood curves - a much better match for the bass.</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>I wonder how any Pianotech List participants
(and/or lurkers!) have addressed control of upright hammer weight in a situation
like this.</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>I don't have any similar new hammers where C88 is
much lighter to try to compare tone.</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>And what the heck kind of wood was used on these
old actions? It is very dark right through - some kind of cedar (no pleasant
odor)?</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>Thanks for any thoughts.</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>Terry Farrell</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
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