CA and Bridge Pins

[Joe & Penny Goss]

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
>
>
>
>