Capo bar noise

[David ilvedson]

> To:            pianotech@ptg.org
> Date:          Thu, 25 Sep 1997 21:16:23 -0400
> Subject:       Re: Capo bar noise
> From:          rmartin30@juno.com (ralph m martin)
> Reply-to:      pianotech@ptg.org

I have come across new Steinways while prepping that had a sort 
of hide glue drop, except it wasn't hard that they used to 
reduce this noise.  Don't know what it is though...

David ilvedson, RPT
Pacifica, CA


> Hi Rob
> 
> ........and yet other techs use a small drop of white glue on each
> string.
> 
> Ralph Martin
> On Thu, 25 Sep 1997 16:48:21 -0400 "Zen Reinhardt"
> <diskladame@provide.net> writes:
> >Hi Rob --
> >
> >Sometimes much of the noise you've described can be reduced by putting
> >something on the strings in the front duplex.  Some people use 
> >vasalene or
> >other forms of non-drying goop.  Some people put on a few coats of 
> >clear
> >nail polish.  The theory is that the stuff prevents only some of the
> >partials from coming through so that the overall tone of the notes in
> >question is not completely killed as you noticed with muting off the 
> >front
> >duplex.  It's frustrating, I know  ...  hope this helps.
> >
> >ZR!  RPT
> >Ann Arbor  MI
> >diskladame@provide.net
> >
> >----------
> >> From: Rob Kiddell <atonal@planet.eon.net>
> >> To: pianotech@ptg.org
> >> Subject: Capo bar noise
> >> Date: Sunday, September 21, 1997 3:56 AM
> >> 
> >> Greetings list, 
> >> 
> >> 	I'm currently working on prepping a new Baldwin L grand 
> >(6'3"), and 
> >> there is a problem with excessive high partial noise from the first 
> >> section of strings above  the agraffe section. Simply put, it is an 
> >> excessive high partial ringing that is absent in the agraffe 
> >section, 
> >> but becomes immediately apparent in the Capo bar section. This noise 
> >
> >> is so harsh as to qualify for ear protectors on a ff blow.  It is 
> >> amplified by the front duplex section between the Capo bar and the 
> >> first plate ridge past the tuning pins, but muting this kills all 
> >> high end frequency and leaves the section lifeless. Hammers are 
> >hard, 
> >> but voicing (I've tried several approaches) only diminishes the 
> >> overall hammer volume, the amount of the high end noise remains 
> >> consistent with the overall volume of the note, either mellow, 
> >medium 
> >> or bright. This noise is also evident when the string is plucked, so 
> >
> >> I feel hammer voicing is not the solution. I have seen this problem 
> >> before on Baldwins, but strangely enough, the identical 6'3" piano 
> >on 
> >> the sales floor exhibits none of this "noise", yet the front 
> >> duplexing section on this piano is amplifying high partials as it 
> >> should.   	 
> >> 	I have spaced strings along the capo bar, streched 
> >> strings, seated strings, muted strings, yet everything seems to come 
> >
> >> back to the Capo bar. Before I begin filing the Capo bar, are there 
> >> any thoughts out there regarding this or similar problems?
> >> 
> >> 
> >> Rob Kiddell
> >> R.P.T., P.T.G.
> >> C.A.P.T. Student
> >> Edmonton, Canada
> >> http://www.planet.eon.net/~atonal/atonal.html
> >
> 
>