?extra concert maintance&string? Ron

Ron Nossaman nossaman@SOUTHWIND.NET
Thu, 10 Jun 1999 22:04:40 -0500 (CDT)


>Hi Ron,
>
>Here's a thought...
>
>On some pianos the bridge pins stick up above the bridge far enough that
>they could be tapped into the bridge another 1/32" - 1/16" bringing the
>string into contact with heretofore unscathed bridge pin surface.  (Some
>wouldn't be high enough, but perhaps it may be an option to a few.  It would
>certainly be a lot less work.)  :-)
>
>Brian Trout


True, but that's just half of the "fix". The same shrink/swell cycles (along
with the playing mileage) that scrubbed the track in the bridge pins also
mashed the top of the bridge under the string so that the bridge top under
the string is no longer flat. to flatten the bridge top and regain the clean
string termination against the bridge cap at the edge of the notch, as well
as at the pin, you've gotta pull the pins and plane (or whatever) the bridge
top flat again. Tapping bridge pins down seems to me to be a better option
than tapping strings down on bridges to minimize wild strings in the killer
octave (the only place I've found either option to be even nominally
effective), but it's a crude and temporary expedient rather than a real fix
in my opinion, since it addresses the symptom rather than the cause.
Incidentally, the scrub track on a bridge pin seems to be in the .015 - .025
range in height, by my measurement, so you wouldn't have to drive the bridge
pin very far to get a fresh string contact surface. 

Does this make any sense at all?

 Ron 



This PTG archive page provided courtesy of Moy Piano Service, LLC