1999 Steinway L with heavy action

[Richard Brekne]

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Mark Davidson wrote:

> I have a 1999 Steinway L with rather heavy action I am looking to
> correct. Friction has been taken care of (was originally 20-30 grams -
> now 10-15).Action has been fully regulated which also improved it
> considerably. Here are some numbers:Balance weight ranges from 38-51g,
> average about 44.Strike weights are medium in the bass crossing over
> to heavy in the tenor.
>
> Asumming a 9 gram contribuition from the Whippen Weight this
> yeilds note   BW    FW    SW   SWRC1     46    36    10.9
> 6.6C2     45    34    11        6.4C3     44    29    10.3
> 6.2C4     41    32    10.5     6.1C5     42    26     9.8
> 6.0C6     38    24     9         5.9C7     43    12     7.6
> 6.0C8     40     7     6          6.3
>
> Looks to me like your leverage is rather inconsistant, perhaps meant
> to be a bit graduated (I've just seen this on a Petrof recently) If
> its graduated you want to find out for sure, and I think checking your
> Key Ratio is a good place to start looking. Maybe for those same 8
> notes for reference.
>
> David Love has a nice proceedure for setting FWs once you have a nice
> even curve and even out whatever ratio problem you have. Basically
> goes along the lines of remembering that BW + FW = [whats on the other
> side at the capstan]. So if you know the top action is predictable,
> and where you want it, then you just add or subtract from / to FW to
> make Balance Weight where you want it. Nice idea if you dont want to
> pay for a set of FW specs and whatever advantages that has.
>
> Hammers are probably more in need of being evened out in general
> rather then lightened in general. Tho it looks like the higher notes
> could use a bit of lightening up. I need to get out my charts :)
>
> You could use the whippen assist, but you can do quite well without if
> you are using a SW curve #  8 or below.
>
> Still, this is a relatively new Steinway, and I'd expect to see a bit
> more consistancy from them.  I'd like to see a complete set of numbers
> on this, checked and double checked.
>
>
>   So I am considering the following: 1. relead keys to bring balance
> weight to 38g 2. (1) plus move lead closer to balance rail to prevent
> slower repetition 3. lighten hammers from tenor up (remove felt? drill
> mouldings? maybe some of each - could use filing anyway)   (piano is
> in a 10X13 room with hardwood floors so a smaller sound would not be
> an issue)
>
>  4. turbo wippen (either leave leads alone or remove some to make
> unsprung BW around 50 - how much are these things $$). 5. some
> combination of above Recommendations? -Mark Davidson

Cheers

RicB

--
Richard Brekne
RPT, N.P.T.F.
UiB, Bergen, Norway
mailto:rbrekne@broadpark.no
http://home.broadpark.no/~rbrekne/ricmain.html
http://www.hf.uib.no/grieg/personer/cv_RB.html


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