One thing I noted about Kimball consoles, back when I saw them quite often: the jacks often stick because the bushings have too much glue on them. Why drying them out would make them stick worse, I don't know. Maybe the heat reactivated the hide glue? Susan Kline John Formsma wrote: > That's true for key sticks. However, Wim said specifically that > various action centers were tight. Works the reverse of key sticks. > More humidity = tighter centers. > > Wim, I assume you checked the balance holes, right? > > I personally think the problem is right there in front of you. The > Kimball name plate. > > OK, all joking aside. Many Kimballs that age have multiple problems. > Tight balance rail and front rail bushings, tight centers, weak jack > springs. Why the sticking is worse without the DC doesn't make sense, > assuming the real problem is tight centers. I think you need more > data. But, that would involve a return trip to a Kimball, which is > currently working well enough to please the customer. Surely you have > better things to do with your time, like get a root canal with no > anesthetic. > > ;-D > > -- > John Formsma, RPT > Blue Mountain, MS > > > On Mon, Sep 3, 2012 at 4:00 PM, John Ross <jrpiano at bellaliant.net > <mailto:jrpiano at bellaliant.net>> wrote: > > As the moisture leaves the keys, the wood fibres draw together, > making the hole tight on the pin. > A person tends to think that as the wood dries 'shrinks' the hole > gets bigger, as seems to happen with tuning pins in the winter/dry > time. > I think I am 'thinking' correctly, if not, I am sure I will be > corrected. > I have been wrong before, and will be again. > John Ross > Windsor, Nova Scotia. > > On 03-09-2012, at 5:25 PM, tnrwim at aol.com <mailto:tnrwim at aol.com> > wrote: > >> Tuned a 40 year old Kimball console on Tuesday last week, 30 >> cents low. All the keys were working, except for a few slightly >> sluggish jacks in the upper register. But after a treating them >> with Protek, they worked fine. The piano has a DC, but it >> wasn't plugged in, which I suspected was causing the few jacks to >> be tight. So I plugged it in, and told the customer to leave it >> on 24/7, as are all DC in Hawaii, explaining the heat will keep >> the action from freezing up, >> Got a call on Friday saying the keys are sticking. Went back that >> evening, and sure enough, about a dozen jacks, hammer >> butts,and wippen centers were very tight. I told the customer >> that it wasn't supposed to work that way, so I unplugged the DC, >> and told the customer to call me if the keys were still sticking >> in a couple of days. This morning he called and said all the keys >> are working. Go figure. >> >> Any one want to speculate why? >> >> Wim Blees, RPT >> Hawaii >> > > > > -------------- next part -------------- An HTML attachment was scrubbed... URL: <https://www.moypiano.com/ptg/pianotech.php/attachments/20120903/37fa6043/attachment.htm>
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