[CAUT] CA glue app. to bridge pins

[Richard Brekne]

The origin of the classic false beat has to do with the entire 
termination. If the string at some frequency in at any given direction 
of oscillation meets a termination which either lengthens or shortens 
the strings effective length in that direction then a false beat will 
occur.  Loose pins in themselves can be demonstrably independent of the 
occurrence false beats that the picture is most certainly a bit more 
complicated. 

That said, the application of CA is likewise most certainly very 
effective in dealing with the classic false beat.  So don't hesitate to 
use it appropriately.

As far as other particular causes you allude to at the end of your 
post.  Anything that can cause the termination to behave as mentioned 
above will result in a false beat. There is a particularly interesting 
analogy in an early PTG Journal article by Jim Ellis that deals with the 
basic physics involved. Its been posted several times the last couple 
years so a search of the archives will no doubt reveal the date for you.

Cheers
RicB


    Hi list,
    Regarding some of the recent submissions about applying CA glue to the
    bridge pin to eliminate false beats, I was wondering if this treatment
    could be compared to applying CA glue to tuning pins?  It seems that
    from reading some calls and responses that this may be oversimplifying
    the physics of the bridge/pin, but is an origin of false beats loose
    bridge pins?  Also,  are bridge pin holes drilled to a specific depth
    to accept the whole length of the pin or are they drilled like tuning
    pin holes, allowing space at the bottom.? I've been very, very curious
    to understand the origin of false beats and how to deal with them
    certainly.
    Thanks in advance for any input,
    Joe Wiencek, RPT