I agree! David Ilvedson, RPT Pacifica, CA 94044 ----- Original message ---------------------------------------- From: PAULREVENKOJONES at aol.com To: pianotech at ptg.org Received: 10/24/2009 8:18:37 AM Subject: Re: [pianotech] weights of hammers and shanks/replacement parts >David: > >I have to say that this is an exceedingly kind note to Julia, and >emblematic of the kind of colloquy for which this list is designed. > >Thanks. > >Paul > > >In a message dated 10/24/2009 2:10:55 P.M. Central Daylight Time, >stanwood at tiac.net writes: >Hi Julia, >Perhaps the lowest tech way of matching hammer weights to match >existing key weights is to dry fit clusters of sample hammers hammers >mid-bass, mid-tenor, and mid-treble and find that weight that gives >you down weights in the high 40's. Check the up weights and if they >are below 20 your friction is too high and if they are above 30 your >friction is too low... I say clusters because no particular key >weighting is likely to be similar to neighbors so you have to look >for average levels in each of the three major sections... >Use a digital scale accurate to 0.1 grams to measure the weights. >If you want to know what weight level your hammer are you can refer to: >http://www.stanwoodpiano.com/SW-HWstandards4.pdf >If you want to measure 88 of the ready to hang hammers, look at a >graph of the weights using excel and come up with specifications to >smooth out the bumps you can go to: >http://www.stanwoodpiano.com/E-SmartChart2.4.xls >The weight of the modern parts isn't your main concern... plenty of >modern pianos play beautifully... it's not the parts so much as the >configuration of the weight and leverages... and keep an eye on that >friction! >It's an extensive subject and very important to our work.... Hammer >weight is the place to start! >Good Luck, >David Stanwood >>Greetings, >> >> This is the first Steinway that I am replacing >>hammers on. I would like to just replace what is there. The keys >>have 4 to 5 lead weights in the bass. I don't think I should change >>it. >> >> What are the pros and cons of just replacing parts that are >>there vs removing key weights and changing ratios and weights? >> >> Is there any reading I can do to help me through this job? I >>have replaced hammers and regulated before...on uprights, and pianos >>like Lester grands, but I have never done a Steinway and the whole >>weight figuring before. >> >> When replacing hammers and shank/flange assemblies, does >>the weight of the shanks along with the hammer weight affect >>downweights/upweights...or is only the hammer weight alone a factor >>for regulation? >> >>Thank You, >>Julia Gottshall >>Reading, PA
This PTG archive page provided courtesy of Moy Piano Service, LLC