Vince and Dave, This method works on just about every plate-gap related problem. I've not used this particular Hysol product, but do use a thicker one (sorry, don't remember the number right now) for final fitting of a new block. Thanks. Horace >On Mon, 03 Mar 1997 18:05:09 -0700 Vince Mrykalo ><mrykalov@BYUGATE.byu.edu> writes: >>I was called to service a piano that has an instability >>problem. It is a Hoernung & Mueller (Danish made) 7' >>grand that has plate bushings and the pin block was >>not fit properly to the plate flange at the factory (so I >>assume). >Vince >We invert the piano on blankets and backfill the crevice between the pin >block and plate flange with a thin Hysol #1051 epoxy, made specifically >for the foundry industry. This has really solved these tuning >instability problems for us. I've done it on Hyundais (every piano they >make needs this), Young Changs (ditto), and even Yamahas. It has ALWAYS >been beneficial and apart from the task of inverting the piano, removing >the lid and hinges, it is very simple. We never do any letting down of >the tension either. Apply it into the crack with a paper clip or piano >wire, using a mirror and a strong light to see what you're doing. I >prefer this to shims any day and the fit is much more complete. >You can buy the Hysol from a distributor here in Somerville, MA, Malcolm >Stevens. I can get more info today at my shop. It is a two part epoxy >and is rather cheap in comparison to some types and it is made for use >next to cast iron. >David Sanderson >Littleton, MA >Pianobiz@Juno.com Horace Greeley hgreeley@leland.stanford.edu LiNCS voice: 725-4627 Stanford University fax: 725-9942
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