[CAUT] Thumping Baldwin SF

[Don Mannino]

I've experienced this key noise as well.  You can verify it by clipping
a small spring clamp on the key at some point, then re-testing.

I suppose it could be fixed permanently, but I've never tried it.  I
have always just reduced it through wippen heel cloth and balance hole
service.

I wonder if loading the keys up with thin C/A glue would kill the
resonance?  Or at least raise the pitch of the noise enough to make it
inoffensive.

Don Mannino

-----Original Message-----
From: caut-bounces at ptg.org [mailto:caut-bounces at ptg.org] On Behalf Of
Ron Nossaman
Sent: Tuesday, December 23, 2008 8:22 AM
To: caut at ptg.org
Subject: Re: [CAUT] Thumping Baldwin SF

Andrew Anderson wrote:
> I was called to tune a Baldwin SF yesterday.  It tuned up beautifully 
> with a nice really clean treble.
> 
> What bothered me was excessive action noise, thumping on every key.  
> It started to stand out in the midrange so I pulled the action 
> thinking there must be foreign objects or bedding issues.  No FOs but 
> bedding might be an issue, no glides.
> 
> Is this a typical feature of Baldwins or is this likely a bedding
issue?
> 
> Andrew Anderson.

I've had them "donk" no matter what I did, usually on release. 
In these cases, it wasn't bedding. The keys (or something) would ring
like xylophone bars. Did it in the piano, and on the bench.

Ron N