  In the last few years, we have carried out several extensive observational
campaigns on pulsating hot subdwarf stars using the Mont4K CCD camera attached
to the 1.55 m Kuiper Telescope on Mount Bigelow. The Mont4K is a joint
partnership between the University of Arizona and Universite de Montreal. It
was designed and built at Steward Observatory. Using the Mont4K/Kuiper
combination, we have so far, and among others, gathered high-sensitivity
broadband light curves for PG 1219+534, PB8783, HS 0702+6043, and Feige 48. We
report very briefly on some of the most interesting observational results that
came out of these campaigns.
