False Beats in high treble after stringing

[Carl Meyer]

I'm no expert, but it's my understanding that epoxy will get thin just
before it sets.  I don't think it matters whether it's heated or not.  Heat
surely speeds up the process though.  This makes it important to clamp
because the joint may slip at the point of reduced viscosity.

Carl Meyer Ptg assoc
Santa Clara, Ca.


----- Original Message ----- 
From: "Greg Newell" <gnewell@ameritech.net>
To: "Pianotech" <pianotech@ptg.org>
Sent: Tuesday, June 10, 2003 6:36 PM
Subject: Re: False Beats in high treble after stringing



O.K. this is something I've been confused about for some time now. I
thought that the chemical reaction between the two components of epoxy were
what caused heat and therefore the curing or hardening process. If you heat
with a hair drier or heat gun how does the epoxy thin and not harden? I
believe you, I just don't know how this is possible. Is there a different
way to mix the epoxy or a different product to buy?

Greg





At 04:34 PM 6/10/2003, you wrote:

>Did you epoxy all of them, or just those that seemed to be loose? When you
>epoxy or CA bridge pins like this, you need to do them all, and
>thoroughly. You need enough epoxy to soak into the bridge cap and fill the
>gap between pin and cap. The bottom of the pin isn't terribly important,
>just the part where the pin enters the cap - where the string is.
>Otherwise, the "still tight" pins will prove to be loose enough to produce
>false beats with the nice new strings. The "best results for the work" way
>to approach this is to pull all the pins, clean up the notches with a
>chisel, and epoxy in new pins. The "least work for the results" method for
>old uprights that need more work than they are going to ever get is to
>apply epoxy around each original bridge pin and heat it with a hair drier
>or heat gun so the epoxy thins and wicks down into the hole around the pin
>- or use CA, also with the original pins in place.
>Ron N
>
>_______________________________________________
>pianotech list info: https://www.moypiano.com/resources/#archives
>

Greg Newell
Greg's piano Forté
mailto:gnewell@ameritech.net



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