false beats from??

[Andrew and Rebeca Anderson]

Ric,
I readily agree that CAing bridge pins will not necessarily remove 
all false beats.  Some times that problem isn't at the bridge, 
sometimes its at the capo or agraffe and sometime it is sympathetic 
beating from a duplex, front or rear (design issue).

I have serviced a piano where bridge cap replacement was not in the 
budget.  There were cracks around the bridge pins in the treble and 
it was terribly noisy.  In desperation I gave it as much CA to drink 
as it would take.  The next day I stopped by to check it out.  I'd 
say 95% of  it gone.  The rest I can work with.  Maybe even 
reduce.  Does CAing the pins work?  Has for me.  100%?  No.  But well 
enough to add to the arsenal.  I can't see a downside to this.

Sincerely,
Andrew Anderson

At 07:22 PM 12/17/2005, you wrote:
>Because for an explanation or theory to have any meaning, it has to 
>be consequent in dealing with the phononema it attempts to explain. 
>There are too many cases where this particular theory doesnt hold 
>up.  You can tighten a loose pin without solving the problem, you 
>can experience a clean string with absurdly loose 
>pins.  The  <<sometimes>> effect of tightening a loose pin or 
>putting pressure on it points (at least me) in another direction.
>
>If the tight pin theory is really valid, then in nearly all cases... 
>if not all...  a false beat will occur when a pin is loose and it 
>will be eliminated upon tightening the pin. Since this is quite 
>clearly, for not to say obviously not true... then the theory has a 
>major problem.
>
>There is no doubt something that changes sometimes when manipulating 
>the pin/pin hole relationship in various fashions.  But it I dont 
>think its even close to been really shown that its simply a matter 
>of the pin being loose. Not by a long shot.
>
>Cheers
>RicB
>
>---------------------
>
>If applying CA glue or a screwdriver sometimes helps, how can you not buy
>the loose pin theory at all?  Short of a defect in the string itself (which
>can and does happen) false beats are almost always due to poor terminations
>and can occur on either side of the speaking length.  I imagine a scientific
>explanation is not complicated though most of the evidence is empirical.  It
>is also true, however, that a loose pin will not always cause a false beat.
>It would depend, I assume, on the pin's ability to move freely.  The fixes
>mentioned below, while they might help, don't always because they may not
>adequately address the problem.
>
>David Love
>davidlovepianos@comcast.net <mailto:davidlovepianos@comcast.net>
>
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