[pianotech] Bobbling hammers and jack spring pressure?

[Joseph Alkana]

Don,

Outstanding compendium of information for us.  Only thing I see absent is a
comment on damper mass. I'd love to see your opinion on this and perhaps
some additional information on your experience re-dampering older actions in
this regard.

 

Thank you for a most enlightening tome.

Joseph Alkana 

 

  _____  

From: pianotech-bounces at ptg.org [mailto:pianotech-bounces at ptg.org] On Behalf
Of Don Mannino
Sent: Saturday, January 24, 2009 9:09 AM
To: pianotech at ptg.org
Subject: Re: [pianotech] Bobbling hammers and jack spring pressure?

 

As some have already found, this problem comes from the style of action
design combined with the regulation of the action, especially the damper
spring tension and damper timing.

 

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