Blubber Pluzzler

[Alan Barnard]

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Damper heads misaligned, hammers brushing or hitting them?

Alan Barnard
Salem, Missouri


----- Original Message ----- 
From: Dave Bunch 
To: Pianotech
Sent: 11/04/2005 11:17:37 AM 
Subject: Re: Blubber Pluzzler


No, but the dampers are involved in the problem.

Dave Bunch
----- Original Message ----- 
From: Mark Ultsch 
To: Pianotech 
Sent: Thursday, November 03, 2005 11:27 PM
Subject: Re: Blubber Pluzzler


Damper lever spring way too tight causing the wippen to want to rotate and keep the jack tucked under the hammer butt??

If I'm way off base, feel free to enlighten me.

I actually like to have customers watch my diagnostic work.  It gives me an excuse to use one of my better diagnostic methods: talking to myself.

Mark Ultsch
Madison
----- Original Message ----- 
From: Dave Bunch 
To: pianotech@ptg.org 
Sent: Thursday, November 03, 2005 6:54 PM
Subject: Blubber Pluzzler


Hello-

Blubbering (double striking) hammers in a vertical are not all that uncommon, but today I found a cause that I don't remember seeing before.

It was a new Baldwin Hamilton studio sized piano. The customer was complaining that several notes in the low tenor area were not sustaining. When I got there I found that these few notes were double striking and sounding like they were blocking when played lightly. Actually anything up to a light/moderate keystroke.

I checked the position of the let off rail and regulation in general. So far things looked fine. Moving the key down slowly produced let off at about 1/8" and there was sufficient key dip for plenty of after touch. Back checking was fine. I went to the worst one and to satisfy my curiosity, cranked the button down to where let off was about 1/2". This changed nothing. The hammer was still bouncing off the top of the jack. Only on a very firm stroke would everything cycle through as it should. Most of the piano was just fine. It was these few notes.

Well, it only took about five minutes to figure it out, but it was a long five minutes with the customer watching. Anyone want to guess on this one?

Dave Bunch



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