Upright Action mounting pins

[Dean May]

Mark wrote: But note that if you move the bass end up or down, the seating
of the dampers will be affected, due to the angle of the strings away from 
vertical.

Could this be why on some old pianos the hammers in the bass section are
grossly out of line? You occasionally run across old pianos with bass
hammers consistently missing one of the bicords and hitting the neighbor
string. It has to be something in the case/keybed shifting or settling, but
what? The action posts settling makes sense. I'll have to check that out on
the next one I run across. 

Dean
Dean May             cell 812.239.3359
PianoRebuilders.com   812.235.5272
Terre Haute IN  47802


-----Original Message-----
From: pianotech-bounces@ptg.org [mailto:pianotech-bounces@ptg.org] On Behalf
Of Mark Schecter
Sent: Thursday, March 02, 2006 11:59 AM
To: tune4u@earthlink.net; Pianotech List
Subject: Re: Upright Action mounting pins



Alan Barnard wrote:

> Your bass strike point is less critical. If the strings are oldish, look 
> under the dampers; the strings will be brighter there. See if the action 
> is at its "historical" position in the bass (after setting the treble). 

But note that if you move the bass end up or down, the seating of the 
dampers will be affected, due to the angle of the strings away from 
vertical.

  >snip<

> When all is well, I'd recommend removing the action, placing a long 
> straight-edge or level  from the bass to the treble post and raising the 
> middle post(s) until they are truly in line. Replace the action and 
> check both ends AND make sure it is evenly seated on all posts.

Since you would have to make sure it's evenly seated anyway, why not 
just leave the action in and adjust the posts only once? Just curious!

-Mark

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