---------------------- multipart/alternative attachment On 17-jan-04, at 11:37, Farrell wrote: > If the original geometry is good, then just replace the originals with=20= > the original-type 16 mm shanks and flanges. Abel makes 'em, and I'm=20 > sure other suppliers have them also. > Yes but the immediate problem you get is when you replace the original=20= hammers as well, because in this case the weight of the hammers is very=20= crucial. It means getting a new hammer that weighs exactly as much as the=20 original. There is no hammer maker who produces exactly that hammer, so you have=20= to modify a new set of hammers and you have to almost ruin that new set=20= of hammers to get back to the original weight. I have seen many attempts to do so and they all looked ridiculous, the=20= tails were still too long and in the end they were still too heavy=20 anyway because the materials used nowadays are different and weigh more=20= than the original hammers of which for instance the original felt was=20 much less dense than VFG felt Abel uses. More lead in the keys will complete the usual and well known=20 catastrophe. My 2 Euro cents Andr=E9 Oorebeek Amsterdam - The Netherlands 0031-20-6237357 0645-492389 0031-75-6226878 www.concertpianoservice.nl www.grandpiano.nl > ----- Original Message ----- > From: Michael Gamble > To: pianotech@ptg.org > Sent:Monday, January 12, 2004 8:58 PM > Subject:S&S replacing Hammer Assemblies with new > > Hello List > Happy New Year > I am currently coming to terms with the need to replace an entire set=20= > of Hammer Assemblies in a 1913 Model A S&S. There is one problem. An=20= > important dimension (measured in mm) needs to be addressed. It seems=20= > that on the older S&S this dimension from the Hammer Flange Centre Pin=20= > to the core of the Roller (Knuckle) was 16mm, while those on the newer=20= > S&S models is 17mm. To change just the Hammer Assemblies involves=20 > elongating the slot in the old Lever (Whippen) through which the Jack=20= > does its work. It can indeed get more complex than this. One could=20 > change the Lever (Whippen) as well, but that would put the touch in=20 > the wrong place on the Key and make it necessary to replace the keys=20= > as well. The reason for replacing the Keys is that in the old Keys the=20= > Balance-rail would be in the wrong place - that's why the touch would=20= > be too heavy. The new Levers do not have Spring Assists and the touch=20= > would therefore be too heavy if the keys were not replaced as well.=20 > This option is expensive - albeit a preferred route to take were money=20= > no object. > Have you all read, marked and learned from Franz Mohr's book "My Life=20= > with the Great Artists"? In this book Franz takes one along the=20 > "preferred" route quite convincingly. You know Franz, of course, as=20 > the "Head Concert Technician" to S&S. > One thing which has not been made quite clear in S&S action diagrams=20= > is.... precisely from where - to - where is this dimension of Hammer=20= > Flange Center - to - Knuckle Core taken? It could be from the middle=20= > of the Knuckle Core to the middle of the Hammer Flange Centre -=A0or=A0-= =20 > It could be from the core-face of the Knuckle (on the Hammer side)=A0to=20= > the middle of the Hammer Flange Centre - and there's a whole=20 > millimeter difference between the two. > Anyone like to take up this Topic? Please? > Regards > Michael G (UK) > > <image.tiff>Keyboard tuner to Glyndebourne since 1980 > > Michael Gamble > Piano/Harpsichord Tuner/Tech. > "Westwick" > 29 Shepherds Way > Ringmer > Sussex BN8 5LT > UK > > michael@gambles.fsnet.co.uk > > tel: > fax: > mobile: > +44(0)1273 813612 > +44(0)1273 813612 > 07766 184580 > > Powered by Plaxo > Want a signature like this? > ---------------------- multipart/alternative attachment A non-text attachment was scrubbed... Name: not available Type: text/enriched Size: 7694 bytes Desc: not available Url : https://www.moypiano.com/ptg/pianotech.php/attachments/3e/42/35/97/attachment.bin ---------------------- multipart/alternative attachment--
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