No, it's a grand. I haven't actually tested the RH. I replaced the DC at her request. I'm not so sure this was a good idea in that after replacement to the new "smart" DC the rusting appeared to accelerate. I checked the DC and it is installed correctly and is working as I believe it should. However, I think there are some environment things working against it. The piano sits under a forced air heater duct, and about 6' away from a sliding glass door into the back yard. Additionally, she only lives a couple of miles from the beach and the humidity in the area is generally higher than the rest of LA. I unplugged the humidifier part of the DC and that appears to have helped the rusting. I'm thinking that an overly dry room right next to a the outside humidity was causing the humidifier to work harder than desirable for the environment. Next visit I may just unplug the whole thing from the wall. I don't think the de-humidifier is necessary in that room, and besides, she complains about the blinking lights from the disconnected, (and now dry), humidifier. -- Geoff Sykes -- Assoc. Los Angeles -----Original Message----- From: pianotech-bounces at ptg.org [mailto:pianotech-bounces at ptg.org] On Behalf Of Farrell Sent: Sunday, March 26, 2006 2:57 PM To: Pianotech List Subject: Re: Protecting plain wire from rust IMHO, the strings in a piano equipped with a properly operating DC system will not develope rust. Have you monitored the RH of the piano interior (is this an upright)? Terry Farrell ----- Original Message ----- > I have a customer with a 1919 Hazelton Bros. piano that I service > regularly > that has rusty strings. The piano has had a DC in it for years. I recently > replaced it as the tank for the old one literally fell out of the piano. > Nevertheless, and in spite of the fact that the DC is functionally > correctly > and is properly maintained, the strings continue to show increasing signs > of > rust. Do you think that employing your Vaseline treatment to these strings > at this late stage might be beneficial? If yes, how would you go about > applying this treatment to strings already in the piano? > > -- Geoff Sykes > -- Assoc. Los Angeles
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