[CAUT] bridge-pin experiment

[Joe And Penny Goss]

Hi Ric,
Could it be that the CA, in addition to curing the looseness of the pin
problem, also eases the transfer of vibrations across the bridge to the back
segments, as well as cleanes up the notching?

Joe Goss RPT
Mother Goose Tools
imatunr at srvinet.com
www.mothergoosetools.com
----- Original Message ----- 
From: "Richard Brekne" <ricb at pianostemmer.no>
To: <caut at ptg.org>
Sent: Thursday, January 03, 2008 6:55 AM
Subject: [CAUT] bridge-pin experiment


> I agree that the addition of CA cleans up a lot of the classic false
> beat... but I remain very unconvinced as to why.  Couldnt resist doing
> my own experiment when I read the first post on this thread.  I took
> three very badly beating strings on 30 year old Petrof that responded to
> the screwdriver pressure,  loosened the string and  removed the pins.
> First I put in very undersized new pins and tuned up again.... 2 of the
> three false beats got way cleaner... one came out perfectly clean... the
> third was about the same.  Then I  removed the strings again and with
> the undersized pins still in soaked the holes with CA... I mean I really
> soaked them suckers.  I waited about 10 minutes and pulled the
> undersized pins which and reamed out the holes to their origional size.
> Then put back in the original pins.  Replaced strings, tuned up and all
> three were clean as a whistle.  Strikes me that the addition of CA is
> affecting the wood itself more then anything else.
>
> Cheers
> RicB
>
>
>     Ah, yous guys is finally startin to listen,
>     BUT, it will not cure all, BUT it sure makes the unison cleaner and
>     much easier to work with in voicing.
>     Strings can exhibit false beats when
>     Bridge pins are loose,
>     kinks in speaking length,
>     rust pits in speaking length
>     Notching faulty,
>     waste end not muted,
>     purpousful design of the manufacture to make the piano sound louder,
>     speaking length has been stretched too far
>     so that there are thin unequal segments,
>     mouse rust spots,
>     others? I'm sure there are.
>