explanation(s), please

[Gregor _]

Annie, without the BANG I would think it could be the pin in the frame. Don´t know the proper English term. I am talking about the pin which is on the downside of the piano, where the string is strung around. Perhaps that pin has a wrong angle, i.e. it shows too much upside. As a result, the string has no "grip" on that pin/frame. But you would see that immediateley if you have a look on that pin: the string would not rest on the frame. I tuned a piano with that damage and the effect was very close to that what you described: raising pitch is followed by strong pitch lowering. But as mentioned: without a strange BANG, just not holding the pitch.
 
Gregor
 
> From: annie at allthingspiano.com> To: pianotech at ptg.org> Subject: explanation(s), please> Date: Fri, 21 Dec 2007 09:29:59 -0600> > A small Brambach grand did something yesterday that has left me bamboozled.> I'd appreciate any information, suggestions, advice....> > When I got there, the piano was surprisingly well in tune, considering its> overall condition. Two trichords in the 6th octave (below the break) were> playing chords, but the rest was pretty OK.> > I pulled one of the offending notes into tune, and almost immediately one> string went "BANG" and dropped pitch, taking the other with it. I pulled it> back up -- no, it had not broken -- and then both of them did the same thing> (big BANG, very flat). I've had that happen after treating pins with CA> glue, but never before, and I hadn't treated any of them at that point. (I> did later, but it didn't have much effect.)> > Here's the part that really confuses me: after that happened, one string of> a 2nd octave bichord went terribly flat on its own AND a cluster of four> trichords just above the break in the 6th octave also spontaneously went> horribly awry. I had not touched any of them.........> > The plate does not appear to be cracked, and I didn't find anything else> that looked particularly suspicious. What am I missing here (other than the> chance to call the trash collectors and get the thing hauled away)? Thanks!> > Annie Grieshop> 
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