The only Cyclone recording I can think of that didn't also stand as a P-50 recording was the growl test on the WisconsinSirens site. http://www.wisconsinsirens.com/sounds/D ... 0Growl.mp3
But ASC's old website listed this as a Cyclone...and on here (airraidsirens.com) lists it as a P-50.
But the Cyclone sounds more sharp from a close-person's point of hearing, because the concentration effect is less, which is why the Cyclone sounds more crisp in all the recordings I've heard it in.