Blubber Pluzzler

[John Delmore]

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Brand new piano?  Dampers so badly regulated that they catch the bass
strings, preventing full travel of the wippen?  When you smack it hard, the
string moves?  Regulate the damper spoon properly, then adjust the damper
head appropriately?
 
  _____  

From: pianotech-bounces@ptg.org [mailto:pianotech-bounces@ptg.org] On Behalf
Of Dave Bunch
Sent: Friday, November 04, 2005 1:17 PM
To: tune4u@earthlink.net; Pianotech
Subject: Re: Blubber Pluzzler
 
This is an odd one....A clue- The notes involved are the first 4 in the
tenor section and no others.
 
Dave Bunch
----- Original Message ----- 
From: Alan Barnard <mailto:tune4u@earthlink.net>  
To: Pianotech <mailto:pianotech@ptg.org>  
Sent: Friday, November 04, 2005 11:48 AM
Subject: Re: Blubber Pluzzler
 
Damper heads misaligned, hammers brushing or hitting them?
 
Alan Barnard
Salem, Missouri
 
 
----- Original Message ----- 
From: Dave Bunch <mailto:pdtek@mchsi.com>  
To: Pianotech <mailto:pianotech@ptg.org> 
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 <mailto:multsch@jvlnet.com>  
To: Pianotech <mailto:pianotech@ptg.org>  
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 <mailto:pdtek@mchsi.com>  
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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