<html> <head> <META HTTP-EQUIV="Content-Type" CONTENT="text/html; = charset=us-ascii"> <meta name=Generator content="Microsoft Word 10 (filtered)"> <style>  </style> </head> <body lang=EN-US link=blue vlink=purple> <div class=Section1> That will take a lot of time, give = you a lot of nice information, but probably won’t help you much at this = stage.  Two minutes to switch hammer at C40 to a 17 mm shank, measure the up and = down weight and give a quick look to see how many leads on that note and = generally spread out through the piano.  That will tell you a bunch.  If that = new knuckle brings you into the ball park and it seems that the number of = leads on that note is within reason and the hammer set isn’t unusually = large you can then proceed with a plan of action, so to speak.  Once you = determine which are the right parts to be in there you can start tweeking the = tweeky stuff.    <div> David Love davidlovepianos@comcast.net<= /font> = </div> -----Original = Message----- From: = pianotech-bounces@ptg.org [mailto:pianotech-bounces@ptg.org] On Behalf Of Horace Greeley Sent: Monday, July 25, = 2005 3:03 PM To: Pianotech<fon= t size=2 face=Tahoma> Subject: Re: S&S = action question   Phil, At 01:19 PM 7/25/2005, you wrote: I have been asked to get this action to feel = lighter. Right now it feels like a Mack Truck. I have not measured DW yet, but it = feels like mid 60's to me. -there is only 15mil from knuckle to bushing. I measured it 3 different = times getting the same result. -Hammers, shanks, knuckles, and whippens have all been replaced, but I = think I'm fighting an uphill battle without replacing those shanks. Your thoughts? Before getting too involved with changing things, take the time to make = very careful measurements in re: action dimensions.  For example, check = out the following: >From the book, "Steinway Regulation" by F. R. Deitz Point of hammer center        Model     S -B       = C-D from underside of string           &= nbsp;         4.6 cm    4.9 cm Point of rep. center           &= nbsp;           &n= bsp;      11 cm  11.3 cm Blow           &nb= sp;           &nbs= p;           &nbsp= ;            =     47 mm    47 mm Dip           &nbs= p;           &nbsp= ;            =             &= nbsp;     9.5 mm   10 mm underside of keytop from keybed           &= nbsp;           &n= bsp;           &nb= sp;    63 mm     65 mm You will want to look at the deck height (key bed to underside of = string, nominally measured at the factory at note 62) which should be nominally 7-1/2".  Everything works backwards from that = measurement.  So, to the extent that it is too "proud" (it is usually too high, = as against too low), you will need to refigure the measurements from = Dietz. Be sure to check the spread - spread pre 84 was  = 4.381" and post 84 was 4.395" I think that you will find some good information on all of this = published some time ago in the Journal by Chris Robinson. Best. Horace </div> </body> </html>