S&S D --BROKEN SOSTENUTO STIRRUP

[David ilvedson]

> Date:          Tue, 27 May 1997 15:55:24 -0400 (EDT)
> From:          JIMRPT@aol.com
> Subject:       Re: S&S D --BROKEN SOSTENUTO STIRRUP
> To:            pianotech@byu.edu
> Cc:            fish@communique.net
> Reply-to:      pianotech@byu.edu

List,

Could someone please list the directions for silver soldering
this type of repair.

ilvey
Pacifica, CA

> Warren;
> In a message dated 5/27/97 3:11:59 PM, you wrote:
> <<The wire is very tight in the holes, do we really need the solder also?>>
>
>   Due to the fact that once the "stirrup" passes the horizontal plane there
> is a "pulling" moment on the stirrup, whether going up or down, it is best to
> fix the stirrup in place by something other than a press fit.  If not, the
> "stirrup"  'will' be worked loose by the action of the monkey or whatever
> device used to activate the sustenuto rod.
> Four methods of acheiving that fixing in place are:
> 1.  CA glue (which I believe Joel said would not work and he is probably
> right, although I don't know enough about the different formulations of CA to
> say for sure)
> 2. Soldering.   Soldering is the traditional technique but is not as strong
> as Brazing.
> 3. Brazing.  Brazing requires a higher heat than Soldering and uses 'harder'
> material than solder .
> 4. Silver Solder.  Sil Sol used in this application would be my preferred
> method.
> The method to use for best adhesion/fixing is to sweat the solder into the
> joint of stirrup and rod.  Even if you don't think there is any room for the
> Sil Sol to flow, it will.
> Jim Bryant (FL)
>
>