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#648706 - 08/19/07 12:34 AM New Estonia - Metallic Buzz - Dampers the Cause??  
Joined: Dec 2006
Posts: 199
Carol I. Offline
Full Member
Carol I.  Offline
Full Member

Joined: Dec 2006
Posts: 199
Michigan
I’ve had my new Estonia L-190 for seven months and I play it every day. I take very good care of it; I have a Dampp-Chaser and an undercover, and I’m having it tuned every couple of months.

But something weird has developed quite suddenly . . . when I strike any key in the bottom half of the keyboard, there’s a brief metallic buzz after the damper falls into place. It’s worse on some notes than others, but I can hear it on every note, approximately from the G above middle C down to the bottom of the keyboard.

My tech was here this morning and spent a long time trying to identify the problem, but without success. On his recommendation I’m going to contact another tech, but meanwhile does anyone have any ideas about what the problem could be?

Thanks in advance for any suggestions you can offer --

Carol


Steinway D, No. 528716 (formerly CD-888)
Estonia L190, No. 6552
Blüthner B, No. 150915
Yamaha Clavinova CLP-380
Roland Digital Harpsichord C-30
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#648707 - 08/19/07 12:58 AM Re: New Estonia - Metallic Buzz - Dampers the Cause??  
Joined: Jun 2001
Posts: 4,586
Bob Offline
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Bob  Offline
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Joined: Jun 2001
Posts: 4,586
Florida
Perhaps the hammer rest rail is loose in the bass - this is a common occurance. The rest rail is supported by 4 or 5 round nuts. Loose nuts will produce a short buzz when the hammer shank hits it as you let up on the key

#648708 - 08/19/07 01:04 AM Re: New Estonia - Metallic Buzz - Dampers the Cause??  
Joined: Nov 2005
Posts: 65
Randy Karasik, Colorado, USA Offline
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Randy Karasik, Colorado, USA  Offline
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Joined: Nov 2005
Posts: 65
Colorado
Yep ... it sounds like the hammer rest rail. If the buzz ONLY occurs when the hammer drops, that's the most likely culprit.

Sometimes I can reach between the strings and tighten the round slotted nuts without pulling the action.

But if those nuts are loose, the lower ones may be at the incorrect height anyway.

It's best to pull the action, set the proper height for the rest rail and then tighten down all of the nuts.

It's about a 5 minute repair.


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#648709 - 08/19/07 01:44 PM Re: New Estonia - Metallic Buzz - Dampers the Cause??  
Joined: Dec 2006
Posts: 199
Carol I. Offline
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Carol I.  Offline
Full Member

Joined: Dec 2006
Posts: 199
Michigan
Thanks so much for the quick replies! I've sent a note to my tech passing along your comments, and he's going to come over on Saturday to have a look at the hammer rest rail.

Can you think of anything else he should check, if this turns out not to be the cause?

He had suspected that the buzz we were hearing was high harmonics in the bass strings ringing through the dampers, so he had been thinking that it was something with the dampers. As I mentioned above, I can hear the noise to some extent on every bass note, and it developed suddenly -- so hopefully these two clues narrow down the possible causes.

Thanks again --

Carol


Steinway D, No. 528716 (formerly CD-888)
Estonia L190, No. 6552
Blüthner B, No. 150915
Yamaha Clavinova CLP-380
Roland Digital Harpsichord C-30
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#648710 - 08/20/07 03:49 AM Re: New Estonia - Metallic Buzz - Dampers the Cause??  
Joined: Sep 2006
Posts: 3,919
Supply Offline
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Supply  Offline
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Joined: Sep 2006
Posts: 3,919
Vancouver Island, BC, Canada
When I am investigating things like this at the piano, I try to isolate different potential factors and problem sources to find the problem through a process of elimination.

For example, I would press a felted wooden slat on the strings to mute them, then play the offending notes. This could take the damper felts out of the equation, as well as making the noise stand out more, if indeed it is coming from something like the hammer rest rail. Let's hope it is simply the rest rail - that is an easy fix.

In case it has not been done before, this is a good time to tighten all action screws.

#648711 - 08/20/07 11:42 PM Re: New Estonia - Metallic Buzz - Dampers the Cause??  
Joined: Dec 2006
Posts: 199
Carol I. Offline
Full Member
Carol I.  Offline
Full Member

Joined: Dec 2006
Posts: 199
Michigan
Jurgen, thanks for the ideas, which I've forwarded to my tech . . . I'm really an amateur at this but I think I'm coming around to his view that it has do with the dampers, because when I press on the damper after sharply striking a note, the buzz stops immediately. (He'd already discovered this.)

Does this eliminate a loose hammer rest rail from the possible causes?

And if so, how could it be that the dampers are not working well on such a new piano? My tech checked their movement and position and they appeared to be perfect.

Carol


Steinway D, No. 528716 (formerly CD-888)
Estonia L190, No. 6552
Blüthner B, No. 150915
Yamaha Clavinova CLP-380
Roland Digital Harpsichord C-30

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