Impedance problem

[Delwin D Fandrich]

| -----Original Message-----
| From: pianotech-bounces@ptg.org [mailto:pianotech-bounces@ptg.org]On
| Behalf Of David Love
| Sent: January 21, 2005 12:41 PM
| To: 'Pianotech'
| Subject: RE: Impedance problem
|
|
| I am aware of how to deal with the problem--mass substituting for
| stiffness, etc..  The question is, why does it happen right in the
| middle of a section of the bridge so that it could be avoided in
| soundboard or rib design or placement.
|
| David Love
| davidlovepianos@comcast.net
|

I suspect there is a strong resonance just at that frequency. I'm not found that
they can all be eliminated. My practice of aligning the ribs in a radial, or
fan, pattern seems to help but does not completely solve the problem. So does
using more, but smaller, ribs for some unexplained reason.

Del