False Beats in high treble after stringing

[Alan]

WARNING: Don't boil the epoxy! A Heat gun can EASILY do this. If it
bubbles, it is ruined and will not set up right. At least that is true
with some epoxies, so I would assume it would be true of them all and
proceed carefully.

Alan R. Barnard
Salem, MO

-----Original Message-----
From: pianotech-bounces@ptg.org [mailto:pianotech-bounces@ptg.org] On
Behalf Of Joe And Penny Goss
Sent: Tuesday, June 10, 2003 9:24 PM
To: Pianotech
Subject: Re: False Beats in high treble after stringing

Greg,
The hardening comes after the two are mixed. Mixing them produces a heat
that in itself thins the epoxy.
Adding more heat further thins the epoxy mix and most likely speeds up
the
cure rate when it cools.
I also think it may tend to mix the two components together
better. Don't know for sure, just my thinkin on it.
Joe Goss
imatunr@srvinet.com
www.mothergoosetools.com
----- Original Message ----- 
From: "Greg Newell" <gnewell@ameritech.net>
To: "Pianotech" <pianotech@ptg.org>
Sent: Tuesday, June 10, 2003 7:36 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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