Massive Pressure Bar

[Scott Jackson]

I've always assumed that as decent uprights such as Yamaha YUX/YUS models
have massive treble pressure bars, whilst cheap Chinese whatever models
apparently use tin-foil, that it does indeed make a difference to sustain
and clean tone.

Scott Jackson
Australia


-----Original Message-----
From: pianotech-bounces at ptg.org [mailto:pianotech-bounces at ptg.org] On Behalf
Of Ron Nossaman
Sent: Friday, 30 May 2008 10:08
To: Pianotech List
Subject: Re: Massive Pressure Bar



> I tuned a new Heintzman 126 the other day and noted that the high 
> treble
> pressure bearing bar was about three times as massive as the pressure 
> bearing for the midrange of the upright piano.
> 
> I curious why this was done.  Anyone know about the thinking that goes
> into this?
> 
> Andrew Anderson


>I'm presuming it's an attempt to improve the treble sustain by 
>minimizing termination losses at the top. That, or the sales 
>staff needed something to point to, since they didn't list A-0 
>length or soundboard area in the brochure.

>Ron N