[pianotech] Warped Keybed

[Leslie Bartlett]

I actually got a man to make me a new keybed once. It would have held a
train- way way overkill on a pos, but it surely worked well.

Les Bartlett Piano Service

 

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From: pianotech-bounces at ptg.org [mailto:pianotech-bounces at ptg.org] On Behalf
Of tnrwim at aol.com
Sent: Friday, May 27, 2011 11:20 PM
To: pianotech at ptg.org
Subject: Re: [pianotech] Warped Keybed

 

Patrick

 

What you will need is a 5' long piece of angle iron, available at a hardware
store. It's an L shaped piece of metal, and you want each half of the L to
be at least 1". Hopefull it will have some holes in it, otherwise you'll
need to drill some. Screw it to the bottom of the keybed, behind the knee
board, (bottom panel). Unless it's really bad, you might not need to heat
the keybed. 

 

Good luck

 

WIm 

 

-----Original Message-----
From: Patrick C. Poulson <pcpoulson at sbcglobal.net>
To: pianotech <pianotech at ptg.org>
Sent: Fri, May 27, 2011 5:50 pm
Subject: [pianotech] Warped Keybed

Good Evening: I went out to look at a Mason and Hamlin console  with a
recurrring problem. The customer's complaint was that the piano would not
stay regulated. Another local technician had been out last year and
regulated it, but it went out of adjustment by the middle of the winter. I
found that the key dip in the middle of the piano was about half of normal,
and the only keys that had normal dip were those at the end. Upon examining
the keybed, I found that it had warped downward, to the extent that there is
now a 5/16" gap between the keyframe and the keybed. The cure that came to
mind for me was to install some metal braces lengthwise that would
straighten the keybed while applying heat. Has anyone else run into this
problem, and if so,  did you find a solution?

Thanks,

Patrick C. Poulson
Registered Piano Technician
530-265-1983

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