[pianotech] clunking upright stickers

[David Nereson]

----- Original Message ----- 
From: "Joe Goss" <imatunr at srvinet.com>
To: <pianotech at ptg.org>
Sent: Tuesday, March 08, 2011 7:43 AM
Subject: Re: [pianotech] clunking upright stickers


> the clunk bay be coming from the balance and front  rail 
> bushings
> Joe Goss BSMusEd MMusEd RPT
> imatunr at srvinet.com
> www.mothergoosetools.com

    As I said in the post, it clunks even when I hold the back 
of the key down, lift up the wippen and let go  (key out of the 
picture except for the capstan screw and possibly sound being 
transmitted into the keybed via hard backrail cloth (?))
    --D. N.





> ----- Original Message ----- 
> From: "David Nereson" <da88ve at gmail.com>
> To: <pianotech at ptg.org>
> Sent: Tuesday, March 08, 2011 1:40 AM
> Subject: [pianotech] clunking upright stickers
>
>
>>    Thanks for all the replies on mating grand hammers to 
>> strings.
>>    Now I have a piano teacher's old upright whose 
>> stickers/wippens clunk pretty loudly when returning.  If I 
>> hold down the back of the keys in question, and lift the 
>> wippen and let it drop, I hear the clunk.  Depressing and 
>> releasing the key also clunks, sometimes just as loudly, 
>> sometimes not.  I tried replacing the sticker cloth with 
>> brand new medium thick action cloth.  Still clunks.  Tried 
>> replacing the sticker cloth with hammer skiving felt about 
>> 1/8" thick and that was slightly quieter, but not much. 
>> Tried re-pinning the wippen flange. Still clunks.  Grabbed 
>> both the sticker and wippen simultaneously, trying to move 
>> them apart and away from each other, testing the 
>> sticker-to-wippen pinning for any play, and didn't feel any. 
>> The action has been regulated (no lost motion).  And it's not 
>> clicks from missing butt felts.
>>    Now, there's some other minor clunking from balance holes 
>> that are slightly "pulley," and from key bushings that could 
>> stand to be replaced, but again, when holding the key still 
>> and raising & releasing the wippen, I still get the noise.
>>    I told her there's always a little noise in the action, 
>> and it can't be eliminated 100%, but these "clunks" seem 
>> excessively noisy and are noticeable even with all the front 
>> case parts in place.
>>    --David Nereson
>>
>
>