Jack button punching compression

[Roger Jolly]

Hi John and Barb,
                                    Shrinking the felt is OK to a 
point.  Upside, a little more stability for the jack position.  Downside, 
an increase in jack noise so be careful.  I suggest you experiment before 
you do all 88.    Usually there is some room to reposition the jack so take 
a careful look at this option.

Regards Roger




At 03:35 PM 10/30/2007, you wrote:
>I'd be tempted to find a different punching.
>There appears to be at least 3 thicknesses available.
>Even after compressing, I don't think it will stay, unless you possibly 
>dampen them, or something.
>John M. Ross
>Windsor, Nova Scotia, Canada
><mailto:jrpiano at win.eastlink.ca>jrpiano at win.eastlink.ca
>----- Original Message -----
>From: <mailto:piano57 at insightbb.com>Barbara Richmond
>To: <mailto:pianotech at ptg.org>Pianotech
>Sent: Tuesday, October 30, 2007 6:07 PM
>Subject: Jack button punching compression
>
>Howdy,
>
>I'm replacing the jacks in some Thayer wippens.  The replacements have 
>really big, fluffy jack button punchings--which put the jack position too 
>far forward and if I bend the spoon backward to get the jack back far 
>enough, there isn't enough tension on the spring that's held by the loop 
>on the jack.  (Follow me?).   Instead of trying to compress the 
>questionable punchings on the jacks, I think it's easier to compress a set 
>of replacement punchings that I have which look less wild than those on 
>the replacement jacks, but still need compressing.  Then I'll simply 
>replace the original poofy ones.  The punchings are on my bench, under a 
>cutting board that is weighted down.
>
>Here's the question--(drum roll):
>
>How long should I leave the punchings under the weight?
>
>This piano belongs to a friend and it will be a good project for her to 
>replace the punchings.  Hmm, I'll have to think of a few other little jobs 
>for her to do...
>
>Thanks,
>
>Barbara Richmond, RPT
>near Peoria, Illinois
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