CA and Bridge Pins

[Richard Brekne]

Very thin... as thin as I could find... ran like water

Joe & Penny Goss wrote:

> Hi Richard,
> What thickness of glue did you use?
> Joe Goss
> ----- Original Message -----
> From: Richard Brekne <Richard.Brekne@grieg.uib.no>
> To: PTG <pianotech@ptg.org>
> Sent: Wednesday, October 18, 2000 12:47 AM
> Subject: CA and Bridge Pins
>
> > Hi List
> >
> > Ran into an interesting experience with CA application on bridge pins I
> > wanted to share with you all. I got to thinking about the discussion we
> had
> > a couple weeks back, about the need to remove the strings etc...
> >
> > It struck me that the strings exert all this side pressure on the bridge
> > pins and that perhaps there was some benifit to exploiting this in
> applying
> > the CA... to keep the pressure on sideways. I wondered if this was going
> to
> > be as big a problem in terms of CA getting on the strings, building up
> > under strings..etc and how much work was going to be involved in cleaning
> > that up.
> >
> > Something about this sideways pressure was to ...er... seductive shall I
> > say... so having the perfect beater to try it out on I decided to give it
> a
> > shot. I mean heck the worst that could happen was that I would have this
> > big mess I would have to clean up on my own time.
> >
> > What I can tell you is this.. There was indeed quite a tendency to build
> up
> > under the strings across the bridge.. especially in deeper string marks on
> > the bridge top. Also noticed quite a buildup down the notch under the
> > string, and the pitch of the piano actually rose quite a bit as this
> > buildup caused a defacto shortening of the strings. Sounded horrible
> > really, very inprecise termination CA makes.. grin.. But the suprising
> > thing was how easy it was to clean all the excess off.
> >
> > Simply loosening the string was enough. I loosened each string enough to
> > pull it off the bridge, used a screwdriver to scrap lightly the excess CA
> > which almost fell off on its own. In a few places where I had applied
> more,
> > I had to sort of "re-notch" the bridge.. but I wouldnt compare this to
> > actuall renotching. It was really easy.
> >
> > This old 9 foot over overly neglected Bechstein also got a dressup of the
> > hammer heads, spread reset and a quick regulation done and hasnt sounded
> so
> > good in many many years. Falsness in this instrument which was nothing
> > short of rampant virtually dissapeared over the whole range of the piano.
> > Couldnt believe the results.
> >
> > --
> > Richard Brekne
> > RPT, N.P.T.F.
> > Bergen, Norway
> >
> >
> >
> >

--
Richard Brekne
RPT, N.P.T.F.
Bergen, Norway