Epoxy Man Strikes Again

[Isaac OLEG]

Hello,

I can't see why the glue joint or glue zone between bridge and
soundboard can't act as a sound modifier, or filter. A too thick  glue
joint certainly should.

And the choice of the glue may change the resonnance frequencies of
the assembly too.

Beside I understand that the bridge and the board  have to be warm
(and dry) to be glued. Do you use the hot box before gluing ?

Epoxyes seems to be cook sometime, to attain their final hardness
temperatures as high as boiling water . I suspect we don't want to
cook our  soundboards as that !

Best Regards


Isaac OLEG

Entretien et réparation de pianos.

PianoTech
17 rue de Choisy
94400 VITRY sur SEINE
FRANCE
tel : 033 01 47 18 06 98
fax : 033 01 47 18 06 90
cell: 06 60 42 58 77

> -----Message d'origine-----
> De : pianotech-bounces@ptg.org
> [mailto:pianotech-bounces@ptg.org]De la
> part de Delwin D Fandrich
> Envoyé : samedi 8 mars 2003 07:30
> À : Pianotech
> Objet : Re: Epoxy Man Strikes Again
>
>
>
> ----- Original Message -----
> From: "gordon stelter" <lclgcnp@yahoo.com>
> To: <oleg-i@wanadoo.fr>; "Pianotech" <pianotech@ptg.org>
> Sent: March 07, 2003 4:36 PM
> Subject: RE: Epoxy Man Strikes Again
>
>
> > A drum made of fiberglass and Titebond(TM) would be
> > even duller, becuause Titebond(TM) is PVA based
> > (Polyvinylacetate ) and never dries truly hard. Modern
> > chewing gum is also PVA. Epoxy dries harder, is a
> > better sound conductor and more moisture resistant.
> >     Also, Titebond, especially Titebond II, stains
> > yellow pretty badly, especially on spruce.
> >      Thump
>
>
> Keeping in mind that the average glueline in a
> bridge-to-soundboard joint
> should be no more than 0.125 mm (or 0.005") thick, this is
> not an acoustical
> problem. Either with Titebond or epoxy.
>
> Del
>
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