Short Treble (sustain?)

[Stéphane Collin]

Just one more info :

Meanwhile, I just tried, as said in replies, to take away a few unissons strings and scrape the top of the bridge, until the varnish and the grooves had disappeared (I had enough downbearing to be able to loose a little bit of wood on the top of the bridge : I only lost 10 % downbearing).  Disappointment : no difference.  It is, though, difficult to say with only a few notes, but yet, ...
While I was there, I tried, following earlier threads, to simulate a kind of duplex, using a small rod (1,4 mm) at the plate and another just behind the agraffee to have the strings bear on it instead of on the felt, and indeed, while this time I lost a more significant amount of downbearing, I had the feeling that the sound was, how say, better breathing : I mean, I think the decay of the higher partials, proportionnally to the decay of the fundamental, was significantly longer.  Again, no spectacular difference, but yet ...
My feeling, though, at the moment, is that I am playing with trifles, but not curing the problem.

Regards,

Stéphane Collin


----- Original Message ----- 
From: "Richard Brekne" <Richard.Brekne@grieg.uib.no>
To: "Pianotech" <pianotech@ptg.org>
Sent: Saturday, November 01, 2003 12:32 PM
Subject: Re: Short Treble (sustain?)


| Hey there Joe, and others
| 
| Just curious as to how a couple thin coats of varnish on the top of the bridge
| can dampen sustain, or otherwise effect vibration of the soundboard ? Could you
| explain your thinking abit here ?
| 
| Cheers
| RicB
| 
| Joseph Garrett wrote:
| 
| > Stephane said: "Indeed, David, both sides, notches and top of bridge are
| > varnished."
| >
| > Stephane,
| > YIKES!!!! Varnish on the TOP of the bridge is, IMO, a big NO-NO! Probably
| > the cause for the lack of sustain. It could be other things, but the varnish
| > on the top ain't helping things, fer sure!
| > I'd take a couple of unisons off of the bridge, scrape off the varnish,
| > being meticulous about the bridge pin area and the termination point. Put
| > the stings back on, tune and test. See what happens. Just my thoughts on
| > this.
| > Best Regards,
| > Joe Garrett, RPT, (Oregon)
| > Captain, Tool Police
| > Squares Are I
| >
| > _______________________________________________
| > pianotech list info: https://www.moypiano.com/resources/#archives
| 
| --
| Richard Brekne
| RPT, N.P.T.F.
| UiB, Bergen, Norway
| mailto:rbrekne@broadpark.no
| http://home.broadpark.no/~rbrekne/ricmain.html
| http://www.hf.uib.no/grieg/personer/cv_RB.html
| 
| 
| _______________________________________________
| pianotech list info: https://www.moypiano.com/resources/#archives
| 
|