[pianotech] Hammer rest felt

[Ed Sutton]

Greetings, Rob,

Is there a functional problem? Lost motion, sagging keys, hammers dragging 
or out of alignment with the strings, no letoff or no aftertouch, or hammers 
mis-firing on a hard blow? Clicking sounds from the action? Is blow distance 
too great? Is letoff too wide?

If no such problems are happening, probably best to leave it alone. If there 
is a problem, the solution may be simple or complex, and will need careful 
diagnosis before "fixing."

There may have been a slight error in manufacture, but if its working, count 
your blessings. "Offset" rest felts are fairly common, and don't cause 
problems in themselves..

But good for you for looking and noticing something amiss. I would follow-up 
as mentioned above; look to see if there is a related functional problem.

Ed Sutton


----- Original Message ----- 
From: "Rob McCall" <rob at mccallpiano.com>
To: <pianotech at ptg.org>
Sent: Saturday, June 13, 2009 3:23 AM
Subject: [pianotech] Hammer rest felt


> Greetings,
>
> I'm a brand new member of the PTG as of this month. I'm also fairly
> new in this industry. I do, however, have a strong desire to learn.
>
> With that preamble in place, here's the problem I came across
> yesterday...
>
> I tuned a 12 year old Yamaha GH1B for a nearby High School yesterday.
> It's been primarily used by the choir and drama departments. Due to
> limited extra time with the piano yesterday because of their
> graduation ceremonies I was unable to pull the action out and take a
> closer look, however, the photo below should show the problem.
>
> It appears as if the hammer rest felt has been displaced to the sides
> by the hammer shank.  This occurs only in the bass section and it
> occurs off and on throughout the range from A0 to A#2.  The tenor
> section to the high treble looks fine.
>
> Any input, ideas, or things I should look for as to the cause of this
> would be greatly appreciated.  I should be able to get back to this
> piano in about 2-3 weeks due to their scheduling.
>
> Thanks,
>
> Rob McCall
> Murrieta, CA
>
>


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