Again, you have me confused with someone else. 741 opamps are a favorite of the academic world, perhaps because they perform so poorly that no student would consider stealing them.how about this link, from ucdavis, about building schmitt triggers with your favorite 741/411 opamps.
It's a Physics class lab experiment, using a 1kHz waveform with 10kHz noise on it. They had to keep the frequency low due to the misapplication of an opamp instead of a comparator.is ucdavis good enough to earn your trust?
http://nuclear.ucdavis.edu/~cebra/classes/phys116/Lab10_rev06.pdf
notice that that circuit is the same as the wikipedia's circuit that you trust.