So, my second attempt at recording this ambiance was successful. You can clearly hear the lower pitched 100T on city hall. I couldn't hear the high pitched one on West Lafayette HS as well as I had hoped, but it can still be heard along with at least 1 2001 and some of Purdue's sirens.
My original intent was to record a Thunderbeam near a park, but camera issues and road closures caused me to run late and forced me to stop early and record the system test instead. If I would have known they would test 3 minutes late, I would have continued on to the Thunderbeam. Oh well, there's always next month...
Enjoy!
http://www.youtube.com/watch?v=5HwQgSDpBDk&fmt=18