Check spring tensions and timing before adding weight. Damper lever spring tension and timing can increase weight dramatically as well as hammer return springs. Check damper springs by feel comparing with pedal engaged versus not. Check hammer return springs by feel by lifting the wippen slightly to make sure the bridal strap isn't tugging on the hammer first. David Love www.davidlovepianos.com (sent from bb) -----Original Message----- From: "Patrick C. Poulson" <pcpoulson at sbcglobal.net> Sender: pianotech-bounces at ptg.org Date: Fri, 13 May 2011 06:59:21 To: <pianotech at ptg.org> Reply-To: pianotech at ptg.org Subject: [pianotech] Knabe Upright Touchweight Good Morning: some friends of mine bought a Knabe studio of recent manufacture which has a very heavy touchweight. The TW is over 80 grams in most of the piano. After checking for tight keys, tight flange centers, and any of the other usual causes of heaviness, I came to the conclusion that having no weighting in the keys is the cause. I am planning to go back and weight the keys. Is there something I am missing here that might be a cure for this condition besides addign lead? Thanks, Patrick C. Poulson Registered Piano Technician 530-265-1983 -------------- next part -------------- An HTML attachment was scrubbed... URL: <https://www.moypiano.com/ptg/pianotech.php/attachments/20110513/4bb49414/attachment.htm>
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