[pianotech] Solution Found to Yamaha C6 Intermittent Key Problem

[David Ilvedson]

94.3%

David Ilvedson, RPT
Pacifica, CA  94044

----- Original message ----------------------------------------
From: <rsfinley at charter.net>
To: pianotech at ptg.org
Received: 2/15/2010 10:17:39 AM
Subject: [pianotech] Solution Found to Yamaha C6 Intermittent Key Problem


>A friend of mine from the Boston Chapter of the PTG came over this morning and 
>diagnosed and corrected the problem with the C6 key on my Yamaha piano. This was 
>the problem I described in earlier emails when the note played intermittently and 
>stopped sounding during fast repetitions. 

>We took the whippen assembly out for C6 and found that the jack was not moving 
>freely enough due to the pin in the hole being too tight. He removed the center pin, 
>reamed and burnished the holes slightly and installed a new pin. He also found that 
>the repetition lever spring was too weak and bent it slightly to increase the tension. 
>He demonstrated the tools that are used and the necessary technique. This 
>corrected the problem and the note can now be repeated quickly. Small adjustments 
>were made to the letoff, hammer blow distance, hammer drop and hammer lift height 
>etc. 

>My friend made a list of tools I need to get in order to make similar repairs if 
>necessary in the future. I am very grateful for his help on this, and for the clear 
>explanations, demonstrations and advice, and thank him very much for being such a 
>good mentor. 

>Robert Finley