Why not do a litmus test on a punching and determine its PH? Thump --- Farrell <mfarrel2@tampabay.rr.com> wrote: > Funny you should mention bad felt John. Just last > week I spent a day doing some refurbishing on an old > original M&H upright from the 1890s - quite > respectable shape for its age. I was putting all new > felt on the keyframe and leveling keys, but the lady > wanted to minimize costs, so the key bushings were > OK and I figured I would not do anything with the > keypins. Upon removal of the center rail pin > punchings, I noticed that the center rail keypins > were all corroded just at the bottom where the felt > punchings were. The front key pins were fine - no > corrosion. But the center rail pins were trashed - I > had to replace them. Bottom line though, I can only > assume the two rails had been exposed to similar > environmental conditions for the past 110 years, but > only the center rail pins corroded - likely the felt > punchings I presume? I wonder what it could be about > the felt that would cause corrosion like that. > > Terry Farrell > ----- Original Message ----- > From: John Ross > To: Pianotech > Sent: Thursday, August 05, 2004 8:23 PM > Subject: Re: replacement hammer butt springs > > > Hi Elwood, > I suppose those repair springs might be ok, in an > emergency. > But, I would recommend, installing the proper new > springs on the rail. If some are bad, the rest are > on the way. > If you do replace the springs, make sure to > remove, any felt that might be there. Impurities in > the felt, was what caused the problem, in a lot of > pianos from the late 70's and 80's > Regards, > John M. Ross > Windsor, Nova Scotia, Canada > jrpiano@win.eastlink.ca > ----- Original Message ----- > From: Elwood Doss, Jr. > To: Pianotech List > Sent: Thursday, August 05, 2004 8:48 PM > Subject: replacement hammer butt springs > > > Anyone have any good ideas regarding installing > repair hammer butt springs in an Acrosonic spinet? > I have the kind of springs that has a flat plate > (really small) with a slot in it for placing a screw > in it. Anyone tried using thick CA glue or that new > "gorilla glue" to attach it to the hammer butt > spring rail? Just wondered. > Joy! > Elwood > > Elwood Doss, Jr., RPT > Piano Technician/Technical Director > Department of Music > 145 Fine Arts Building > University of Tennessee at Martin > Martin, TN 38238 > 731-881-1852 __________________________________ Do you Yahoo!? Yahoo! Mail Address AutoComplete - You start. We finish. http://promotions.yahoo.com/new_mail
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