[CAUT] after ring on bass damper

[PJR]

FWIW: Had that problem with a damper once and couldn't solve it, so I 
exchanged the damper with the one next to it that was working. I Still 
had the same problem.  I knew then that it must be a stiff underlever 
flange.  It was.  Since my repinning tools were in my car and the 
musicians were waiting, I exchanged the underlever with the top treble 
one and 'Voila',  Problem solved!

Phil Ryan
Miami Beach

David Ilvedson wrote:
> Wim,
>
> If the rings goes away when you add a little pressure to the damper head, you have isolated the problem to that damper.   I'd check the weight/spring tension on the damper.  Is it different than the dampers around it?   I have a Sty D that has some damper over-ring, not isolated.   I'm thinking the bass dampers don't have enough damper weight/tension...is there measurement for this?   
>
> David Ilvedson, RPT
> Pacifica, CA  94044
>
> ----- Original message ----------------------------------------
> From: "David Love" <davidlovepianos at comcast.net>
> To: caut at ptg.org
> Received: 8/1/2009 8:46:35 PM
> Subject: Re: [CAUT] after ring on bass damper
>
>
>   
>> Try working with the seating of the damper fore and aft.  Tilt the head
>> slightly forward or backward until you get it quiet.  Sometimes the location
>> of the node creates some problems that careful seating will take care of.
>>     
>
>   
>
>   
>> David Love
>>     
>
>   
>> www.davidlovepianos.com
>>     
>
>   
>
>   
>> From: caut-bounces at ptg.org [mailto:caut-bounces at ptg.org] On Behalf Of
>> wimblees at aol.com
>> Sent: Saturday, August 01, 2009 8:04 PM
>> To: Pianotech at PTG.org; caut at ptg.org
>> Subject: [CAUT] after ring on bass damper
>>     
>
>   
>
>   
>> I've got a Kohler & Campbell 5'9" grand that has very noticeable after ring
>> on B1 and C2. At the convention I asked Roger Jolly about it, and he showed
>> me how to "voice" the damper felt, by sticking a long needle into the felt,
>> first from the front, and then from the back. He demonstrated this technique
>> on several notes on a couple of different pianos, and it worked quite well.
>> But yesterday I went to the piano in question, and tried to do the same
>> thing. I got the damper to work a little better, but there is still a lot of
>> after ring. 
>>     
>
>   
>> This is not a sympathetic vibration coming from another string. The damper
>> is properly seated, with plenty of follow through. The actual ring of the
>> string stops, but there is excessive after ring. It goes away when I put
>> just a little bit of pressure on the damper head.
>>
>> I'm open to other suggestions. 
>>     
>
>   
>> Willem (Wim) Blees, RPT
>> Piano Tuner/Technician
>> Mililani, Oahu, HI
>> 808-349-2943
>> Author of: 
>> The Business of Piano Tuning
>> available from Potter Press
>> www.pianotuning.com
>>     
>
>
>