Grand Touch

[David Love]

My comments were really on a different thread addressing what constitutes
too much lead, but trying to draw a relationship between high upweight and
amount of lead is dubious.  There are many examples of high upweights and
overleading as friction within the system is the more likely cause of low
upweights than too much lead.  I do agree that the balance rail hole, or
angle of the balance rail pin (to much rearward inclination), or early
damper pick up are all good possibilities.  But since those were mentioned
prior to my suggestion to examine the amount of lead, I didn't feel it
necessary to restate them.     

 

David Love
davidlovepianos at comcast.net
www.davidlovepianos.com 

-----Original Message-----
From: pianotech-bounces at ptg.org [mailto:pianotech-bounces at ptg.org] On Behalf
Of Roger Jolly
Sent: Tuesday, July 11, 2006 9:12 PM
To: Pianotech List
Subject: RE: Grand Touch

 

Hi David,
                 With an average up weight of 28gms, I would seriously doubt
there is too much lead in the keys.  Too much lead tends to give you an up
weight of 50% or less.
I know an over generalization.  <G>
My money is still going to be on the balance rail hole.  The problem is far
more endemic than we think.

Regards Roger



At 06:55 PM 7/11/2006, you wrote:



With respect to the question of how many leads it has as much to do with
position as number and really boils down to the overall front weight of the
keys.  If there are a lot of leads or if they are all pushed way forward on
the key, a high measured front weight can introduce inertial problems such
that even if the static weigh-off is light the dynamic performance can
suffer from a feeling of sluggishess.  That's why overcoming weight problems
by simply adding more lead can be counterproductive.  How many leads and
their position in the key will give you a quick indication if there might be
a problem in this area.    

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