Just a thought - how much heat would be transferred to metal under these plating conditions? Would it be similar to the cryo process - in that the returning to normal room temp that allows the metal to relax further (i.e. the heating up of the brass) and not the freezing of the brass - if the application of the gold/silver includes heating the metal up then this might be relaxing the brass?
Simon >-- Original Message -- >From: <[EMAIL PROTECTED]> >To: "'The Horn List'" <[EMAIL PROTECTED]> >Date: Thu, 7 Oct 2004 13:00:28 +0200 >Subject: [Hornlist] silver plating & rationale >Reply-To: The Horn List <[EMAIL PROTECTED]> > > >Thank you all for your input regarding your experience of sound changes >after silver plating your instrument, but I was not interested to hear >your experience, as I have my own allready. > >I was & I am still very interested about the rationale behind the sound >change as explained, so to know more about the physical process, which >changes the sound appearantly. What happen with the instrument when >plating ? > >I know already, that 5 Amp. per 16 square inches (SI) electricity is >used for silver plating & 2 Amp for gold plating. > >The technician told me, that the result a bi-metal could cause the >effect ??? Harder metal (brass) plus the softer metal surface (silver & >gold) ??? > >Off course, the instrument is cleaned before the process: polished & >ultra sonic degreased. But it was clean before, as I keep my instruments >clean. > >The sound changes did occur with my 23 years old double as well with the >brand new Viennese single. Well, brand new means, it has been used just >for very few performances to be tested, the surface still shiny. So to >make all clear. The old double was maintained perfectly, regularly >cleaned inside & outside, not dents, no plaques. Just lacquer stripped. >It was also a perfect horn when lacquere, but I got into difficulties >when moved from the usual place in the pit to the brass side, sitting in >front of the timps & playing verse the "sack" below stage or against the >timps. > >Scientists, you are asked for an explanation. > >Thanks in advance. > > >Prof.Hans Pizka, Pf.1136 >D-85541 Kirchheim - Germany >Fax: 49 89 903-9414 Phone: 903-9548 >home: www.pizka.de >email: [EMAIL PROTECTED] > > >_______________________________________________ >post: [EMAIL PROTECTED] >unsubscribe or set options at >http://music.memphis.edu/mailman/options/horn/amade%40lineone.net Regards, Simon __________________________________________________________________ Get Tiscali Broadband From �15:99 http://www.tiscali.co.uk/products/broadbandhome/ _______________________________________________ post: [EMAIL PROTECTED] unsubscribe or set options at http://music.memphis.edu/mailman/options/horn/archive%40jab.org
