damper lever ht.

[Mary Smith]

Wim,

Yes, and the HEIGHT of the underlever flanges is determined by when you 
want them to be contacted by the rising back end of the key, right? SO even 
if you lower the tray,the flanges might still need to be at 1-1/2" to get 
proper lift. But, as Fred and Eric have correctly pointed out, you really 
need to break down and replace the back action, and convert that rascal 
pitman. If you're not ready to replace the back action, for budget or time 
reasons, then replace the key end felt again, see if you can wiggle the 
underlever height a bit, and convert the pitman anyway. Then plan to do the 
back action ASAP. You'll be glad you did!

Mary Smith
University of Texas at Austin


>Fred's right Wim....The best way of fixing the (teflon bushed) short-lever
>problem we've found here is to install a new current production back-action
>from Steinway. It's really easy to do right out of the box with the only
>adjustments needed being the left to right alignment. I think it runs about
>$900. Installing it also allows (forces?) you to convert to a floating
>pitman which is a good thing.
>
>Eric
>
>~~~~~~~~~~~~~~~~~~~
>Eric Wolfley
>Head Piano Technician
>Cincinnati College-Conservatory of Music
>University of Cincinnati
>~~~~~~~~~~~~~~~~~~~~
>
>
>-----Original Message-----
>From: Fred Sturm [mailto:fssturm@unm.edu]
>Sent: Thursday, September 11, 2003 11:48 AM
>To: College and University Technicians
>Subject: Re: damper lever ht.
>
>
>Wim,
>         The issue is not so much the angle of the levers as the manner in
>which
>the two arcs intercept - arcs of underlever versus arc of key (here,
>balance hole to key end). This is very similar to what is done in placing
>capstans and wippen heels for minimum friction. The line between balance
>hole and lever center should correspond to the middle of the travel of the
>underlever end. Seems to me there was an article in the PTJ pretty recently
>(within the last year?) outlining how to measure this. (It's just a bit
>hard to get ones hands and fingers in to stretch a string <g>).
>Regards,
>Fred Sturm
>University of New Mexico
>
>--On Thursday, September 11, 2003 11:23 AM -0400 Wimblees@aol.com wrote:
>
> > When I took Rick & Chris' class on the Renner damper tray replacements, I
> > learned that over the years, the angle of the levers had changed from
> > what they were originally, so that the angle of the levers in pianos made
> > in the 70's were so steep that the levers were digging into the lifter
> > felts. And that is what is happening on one of my B's. The mid section
> > lifter felts have been replaced once before, and I am doing it again.
> >
> > I looked at the levers, and they are at about a 10 or 12% degree angle.
> > The height is also 1 5/8" instead of the normal 1 1/2". My questions is,
> > can I lower the whole tray so that the levers are more level, and the
> > height will be 1 1/2"? Or am I asking for trouble?
> >
> > Wim
>
>
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