Backcheck noise

[David Love]

It's a new Steinway and the fit seems good.  It's happening throughout the
piano (though it's most audible in the treble) and seems to be getting
worse.  Whether it's leather, Ecsaine, or some other synthetic, I'm not sure
and will have to go back and check it more carefully.  The knuckles were
definitely something artificial.  If leather, treatment with lanolin is
something I've heard about but not ever tried.  Lanolin should absorb into
the leather, I would think, and not get gummy. 

David Love
davidlovepianos at comcast.net 
www.davidlovepianos.com

-----Original Message-----
From: pianotech-bounces at ptg.org [mailto:pianotech-bounces at ptg.org] On Behalf
Of Mark Schecter
Sent: Friday, August 04, 2006 8:12 PM
To: Pianotech List
Subject: Re: Backcheck noise

Hi, David.

I was just wondering a couple things. One, is it leather, or ecsaine? 
Two, does it fit tightly over the underfelt? Because if it's loose and 
it's leather, you could tighten it by wetting it and letting it dry and 
shrink. But if it's ecsaine, I don't know whether that would have any 
effect.

On the lanolin, I could only guess, that it might soften it up and 
reduce the noise in the short run. But I would wonder whether it 
wouldn't get gummy in the long run and cause a different kind of noise 
and/or problems with checking/release. Not having actually used lanolin, 
though, I don't know.

-Mark Schecter

David Love wrote:
> I'm pretty sure it's the backchecks.  What does anyone know about methods
of
> treating the leather with lanolin?
> 
> David Love
> davidlovepianos at comcast.net 
> www.davidlovepianos.com
> 
> -----Original Message-----
> From: pianotech-bounces at ptg.org [mailto:pianotech-bounces at ptg.org] On
Behalf
> Of Sid Blum
> Sent: Friday, August 04, 2006 7:23 PM
> To: Pianotech List
> Subject: Re: Backcheck noise
> 
> Here's a long shot-
> 
> Any chance the keyframe punchings are hard and transmitting noise ?
> 
> Bedding loose?