Mechanical Music Digest  Archives
You Are Not Logged In Login/Get New Account
Please Log In. Accounts are free!
Logged In users are granted additional features including a more current version of the Archives and a simplified process for submitting articles.
Home Archives Calendar Gallery Store Links Info
MMD > Archives > August 2000 > 2000.08.07 > 09Prev  Next


Duo-Art Expression Box Rebuilding Improvements
By Julian Dyer

Spencer Chase mentions gasketing and screwing together his Duo-Art
expression box.  This was always the practice of Aeolian in the UK,
anyway, so it's authentic to some degree!

Expression boxes in UK pedal-electric grands normally have round-top
screws on top of the expression box outside the seal cloth, with
springs and washers to keep the joint tight as the wood moves.  Upright
boxes, otherwise identical, seem to have countersunk wood screws
underneath the top seal cloth, presumably because of the limited top
clearance in an upright piano installation.

I rebushed all the bearings in my instrument last year, and sanded
the knife valve with the finest paper on a piece of sheet glass.
I can confirm that it really makes a difference to the quiet playing.
I wonder how much the use of modern materials and bearings adds over
traditional techniques?  Although many 'improvements' are disasters,
some must be good and it would be nice to know which!

Julian Dyer


(Message sent Mon 7 Aug 2000, 12:38:16 GMT, from time zone GMT+0100.)

Key Words in Subject:  Box, Duo-Art, Expression, Improvements, Rebuilding

Home    Archives    Calendar    Gallery    Store    Links    Info   


Enter text below to search the MMD Website with Google



CONTACT FORM: Click HERE to write to the editor, or to post a message about Mechanical Musical Instruments to the MMD

Unless otherwise noted, all opinions are those of the individual authors and may not represent those of the editors. Compilation copyright 1995-2024 by Jody Kravitz.

Please read our Republication Policy before copying information from or creating links to this web site.

Click HERE to contact the webmaster regarding problems with the website.

Please support publication of the MMD by donating online

Please Support Publication of the MMD with your Generous Donation

Pay via PayPal

No PayPal account required

                                     
Translate This Page