This is a multi-part message in MIME format. ---------------------- multipart/alternative attachment ----- Original Message -----=20 From: Wimblees@aol.com=20 To: caut@ptg.org=20 Sent: August 09, 2002 11:04 AM Subject: Re: Accu hitch pins In a message dated 8/9/02 9:32:17 AM Central Daylight Time, = atodd@UH.EDU writes:=20 Wim,=20 Wouldn't one need "several" thicknesses of wood to do this?=20 It's going to vary across the scale, isn't it?=20 Avery=20 According to what Kent told me, there is no difference, as long as = there is enough bearing. If more bearing is needed, all you need to do = is tap the string down on the pin. =20 Wim=20 I would guess that Kent either misunderstood your question or you = misunderstood his answer. It would be rare for the string elevation = above the plate to be uniform across the scale. This setting is going to = vary depending on the physical idiosyncrasies of the specific soundboard = assembly and the specific plate casting. And with the phase of the moon = and on how close it is to the Winter or Summer Solstice. If the intent is to duplicate the original bearing settings then simply = measure and record the elevation of the end strings of each section and, = perhaps, one or two toward the middle before destringing. String the = piano and set the new strings back where the originals were.=20 In all probability, however, new bearing settings will be desired to = accommodate a slightly settled soundboard. Usually this means that the = strings will end up a bit lower on the pin than they were originally. = Assuming the factory got it right originally. Probably the easiest way to do this is to start by setting them where = they were originally and measure string deflection using a bubble gage. =20 You can use the settings in the directions sent by Avery or follow the = general rule of 1.5% of string tension bearing against the bridge in the = treble section, easing off to 1.0% in the tenor and 0.5% in the bass. = Since bubble gages vary in how they read you'll have to find out what = each gradation means on the gage you're using. The Baldwin-designed gage = is set up so that each gradation indicates 17 minutes of arc. Or, = translated, 0.5% of string tension bearing against the bridge. Del ---------------------- multipart/alternative attachment An HTML attachment was scrubbed... URL: https://www.moypiano.com/ptg/caut.php/attachments/b7/17/e5/d0/attachment.htm ---------------------- multipart/alternative attachment--
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