Links
The PTG National web page has links to many outstanding and useful sites: their own web forums, manufacurers, supply houses, and educational sites.  But here are a few piano and music related links that are “off the beaten path" that we think are particularly interesting or unique. Let us know if you have your own favorites and we'll add them.  
- DS & CB
Columbus Symphony upcoming concerts and news.
  The Columbus Symphony
Promusica concert events, educational outreach and news.
  Promusica Chamber Orchestra
Steinway wrote a detailed diary for much of his life, and the Smithsonian Institution has made a searchable version of it available.
  Steinway Diary
Tom Harr's pictures of tech tips, instrument restorations, articles, and more.
  Tom Tuner's Flickr Page
Excellent articles about the fundamentals of piano acoustics from the Royal Institute of Technology in Stockholm, Sweden.
  Five Lectures on Piano Acoustics

The collection of historical musical instruments at the University of Michigan School of Music. The web site has a virtual tour including pictures and sound samples.
  The Stearns Collection
An extensive list of electric pianos, with some rare and unusual instruments.
  Simon's Hall of Electric Pianos
The piano company who answered the question: “What would happen if we made a piano with plain-wire bass strings?"
  The Klavins Piano

_The  Mammoth VCG is a 7' tall vertical piano with a 9' concert grand string scale.
  The Mammoth Piano
A compendium of some bizarre home-made instruments, like the
Stalactite organ, the Light Harp, and the Harpsicord made of LEGOs.
  Unusual Musical Instruments
Musical on-line exhibits from the Exploratorium science museum
in San Fransisco demonstrating the science of music.
  The Exploratorium
Beautiful old uprights converted to beautiful new uses.
  The Upright Furniture Co.
A guy in Iowa decides the best thing to do with his old upright is to convert it to an aquarium.
  The Aquiano