CA and Bridge Pins

[Joe & Penny Goss]

Hi Richard,
I have never tried CA on a Grandfor fear that the glue would  run all over
the bridge where it was not needed.
I have done at least 50 uprights with the thinnest. All of them when doing
the tuning pins.
After treating the tuning pins, with the piano laying flat on my tilter, I
raise the piano to about 45% and treat all the bridge pins that the bass
strings do not cover. These are old beaters so far and no guarentee is given
as to the results. But so far a BIG improvement in each instrument False
beats almost eliminated making them far more tunable.
Joe Goss
----- Original Message -----
From: Richard Brekne <Richard.Brekne@grieg.uib.no>
To: <pianotech@ptg.org>
Sent: Wednesday, October 18, 2000 12:41 PM
Subject: Re: CA and Bridge Pins


> 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
>
>
>
>
>