Yamaha Jumping Jacks

Ric Brekne ricbrek@broadpark.no
Mon, 07 Nov 2005 00:19:50 +0100


Dave, Marcel.

Most pianos I run into over here do not have glued jack return springs. 
Obviously, if you have such a piano the job becomes just that much more 
time consuming. One can lower tension of jack springs in a couple ways. 
You can compress them and tho this gives only minor changes sometimes 
thats enough. You can clip off a couple rounds at the top and bottom of 
the spring effectively shortening it.  You can wrap the coils around an 
appropriate sized pin and tighten the coils.  And, as Dave mentions... 
if its just easier to use a shorter spring to begin with... you can just 
replace the whole set.... they are certainly cheap enough.

Its easier then it perhaps seems.  Give it a try.  You should be able to 
lower spring tension too much with out any real difficulty on just about 
any piano.  Grin.. ok  the non glued type anyways.  btw... I thought 
most manufacturers stopped doing that. Waste of time and glue really...

Cheers
RicB


........................

Ric,
 
Taking them out is usually easier said than done when the springs are glued  
to the wippen.  
 
How does one lower the tension on the springs, provided they can be removed  
without major mangling?  Squash them?  Replacing them seems like the  way to 
go.
 
Just wondering.  I've been seeing lots of bobbling hammers  lately.
 
Dave Stahl



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