The person who uploaded this to YouTube, Minerva Mink, is no longer an active member of this board, but I did get his permission to post a link to it here.
http://youtube.com/watch?v=9dwZPVHvo_g
This is the same Thunderbolt 1000T I heard from 1986 to 1997, while I was attending the Kentucky School for the Blind. The school sits across the street from this Thunderbolt, but it never seemed as loud as it should be from that close. I guess that from the school, it's being blocked by buildings. Notice that it has a C series blower, which is unusual for here in Louisville. I love the sound of this Thunderbolt.