Jeff, if you find a link to that site, I sure hope you'll post it here. I've been looking for it with no success. IIRC it was a a link to a steam whistle hobby group. Here's the list I got from the site. Hope this is of interest. -- Ed
Locomotive Whistle Musical Notes
UP (Union Pacific) B-D-F#-G#-B
CB&Q (Burlington) G-B-D-E-G
CN (Canadian National) C-B-D-F#-G
Southern F#-B-D-G-B
SP (Southern Pacific) C#-D#-F-G-A#-C#
Reading F#-A-C-D#-F#-A
Nathan (Diesel Air Horn) C#-D#-F-G#-B-D#
Edited 1 time(s). Last edit at 04/01/2016 01:19PM by Ed Stabler.