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Below are all the numbers I currently have for this piano. =20
I will check out everyone's suggestions when
I get a chance. Thanks for your input.
-Mark Davidson
gory details:
DW, UW, FRICT,BW, FW, SW
59, 33, 13, 46, 27.3
62, 30, 16, 46, 33.8
58, 35, 11.5, 46.5, 35.3
C1 56, 36, 10, 46, 36.1, 10.9
55, 31, 12, 43, 33.6, 11.2
54, 37, 8.5, 45.5, 34.7
54, 30, 12, 42, 34
52, 34, 9, 43, 36.6
55, 35, 10, 45, 36.2
59, 36, 11.5, 47.5, 28
55, 35, 10, 45, 30.9
55, 32, 11.5, 43.5, 33.7
58, 36, 11, 47, 32.3
53, 28, 12.5, 40.5, 34.2
54, 35, 9.5, 44.5, 33.5
C2 60, 30, 15, 45, 34.5, 11.0
52, 30, 11, 41, 34.6, 11.0
52, 28, 12, 40, 36.1
60, 23, 18.5, 41.5, 33.8
53, 29, 12, 41, 37.9
55, 32, 11.5, 43.5, 33.5
54, 25, 14.5, 39.5, 33.9
57, 32, 12.5, 44.5, 32
53, 28, 12.5, 40.5, 33
56, 33, 11.5, 44.5, 34.2
60, 24, 18, 42, 32.2
58, 34, 12, 46, 28.3
C3 59, 29, 15, 44, 29.4, 10.2
55, 34, 10.5, 44.5, 25.6, 10.4
58, 29, 14.5, 43.5, 27.9
54, 30, 12, 42, 26.7
56, 31, 12.5, 43.5, 24.5
58, 36, 11, 47, 22.5
60, 30, 15, 45, 23.9
51, 37, 7, 44, 23.2
55, 31, 12, 43, 24.5
51, 34, 8.5, 42.5, 27.3
51, 28, 11.5, 39.5, 26
50, 32, 9, 41, 26.2
C4 51, 31, 10, 41, 31.1, 10.5
57, 26, 15.5, 41.5, 27.6, 10.4
50, 32, 9, 41, 31.2
51, 25, 13, 38, 31.2
50, 27, 11.5, 38.5, 32.2
53, 27, 13, 40, 29.3
51, 28, 11.5, 39.5, 27.6
51, 33, 9, 42, 24.8
51, 33, 9, 42, 25.1
52, 34, 9, 43, 25.2
49, 30, 9.5, 39.5, 24.9
47, 30, 8.5, 38.5, 28.7
C5 48, 36, 6, 42, 26.1, 9.9
55, 23, 16, 39, 27.5, 9.8
48, 30, 9, 39, 25.2
51, 29, 11, 40, 24.2
51, 27, 12, 39, 27.3
47, 34, 6.5, 40.5, 23.9
51, 32, 9.5, 41.5, 20.2
49, 32, 8.5, 40.5, 24
54, 31, 11.5, 42.5, 23.9
49, 32, 8.5, 40.5, 26.1
49, 24, 12.5, 36.5, 24.8
53, 29, 12, 41, 24.7
C6 46, 30, 8, 38, 23.7, 9.0
59, 25, 17, 42, 20, 8.8
51, 33, 9, 42, 18.8
52, 33, 9.5, 42.5, 15.2
56, 36, 10, 46, 17.5
53, 33, 10, 43, 17.6
53, 34, 9.5, 43.5, 16.9
58, 31, 13.5, 44.5, 17.1
53, 36, 8.5, 44.5, 11
52, 34, 9, 43, 16.8
49, 31, 9, 40, 15.7
55, 29, 13, 42, 16.4
C7 50, 36, 7, 43, 12.4, 7.7
54, 30, 12, 42, 11.1, 7.6
47, 34, 6.5, 40.5, 13.9
51, 32, 9.5, 41.5, 11.4
49, 35, 7, 42, 9.9
50, 37, 6.5, 43.5, 7.6
54, 37, 8.5, 45.5, 6.7
50, 37, 6.5, 43.5, 7.7
52, 33, 9.5, 42.5, 6.1
49, 37, 6, 43, 6.4
50, 33, 8.5, 41.5, 6.6
50, 35, 7.5, 42.5, 6.3
C8 47, 33, 7, 40, 6.5, 6.0 =20
----- Original Message -----=20
From: David Love=20
To: pianotech@ptg.org ; Mark Davidson=20
Sent: Sunday, June 01, 2003 10:00 AM
Subject: RE: 1999 Steinway L with heavy action
It appears that the SBR (leverage) is a bit high in this piano. You =
need to provide a bit more information but it seems to average =
approximately 6.2. My guess is that the knuckle position is 16mm and it =
should be 17 mm. That would lower the ratio to approximately 5.8 =
(average) and would be sufficient to lift the existing hammer weight =
without excessive front weighting. Depending on the situation I would =
consider moving the knuckle. Since you didn't provide upweight and =
downweight information, I don't know what the friction component is. =
But moving from a 16 - 17mm knuckle will also lower the friction a bit. =
You might also check the capstan line. Measure the key ratio in the =
bass as well as the treble to see if the key ratio changes through the =
piano. Another possibility is to move the capstan line forward in order =
to achieve a uniform key ratio and reduce the leverage to the necessary =
level at the same time. I wouldn't take any weight off the hammers, =
they are not that heavy to begin with. =20
David Love
davidlovepianos@earthlink.net
----- Original Message -----=20
From: Mark Davidson=20
To: pianotech@ptg.org
Sent: 6/1/2003 6:10:44 AM=20
Subject: 1999 Steinway L with heavy action
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.
note BW FW SW
C1 46 36 10.9
C2 45 34 11
C3 44 29 10.3
C4 41 32 10.5
C5 42 26 9.8
C6 38 24 9
C7 43 12 7.6
C8 40 7 6
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
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