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Period study of 321 fundamental mode galactic field RR Lyrae type stars(RRab), which had appropriate data in ASAS and SuperWASP surveys, brighter than12.5 mag in maximum light was performed. We found 100 stars to be definitelymodulated. In 25 cases, previously unknown modulation was revealed and 8 newcandidates for Blazhko stars were identified. In 18 previously found Blazhkostars, no modulation was detectable. Multiple modulation was revealed for eightstars that were previously proposed to show simple modulation. In total, therewere twelve stars with some peculiarity in their modulation in the sample. Thisbrings the incidence rate of multiple/irregularly-modulated stars to 12 %. Theratio of the modulation periods of five of the double-modulated stars waswithin the ratios of small integers. One of stars studied, IK Hya, showed avery interesting frequency spectrum, which we interpret as changing Blazhkoperiod between 71.81 and 75.57 days and an additional 1403-day-long cycleanalogous to a four-year cycle of the prototype RR Lyr. The limits of theshorter period produce a beating period that is approximately twice as big as a1403-day period. The newly revealed Blazhko star RZ CVn seems to undergochanges in the amplitude of the modulation, as well as in the basic pulsationand Blazhko periods. We found that the incidence rate of the Blazhko RR Lyraesis at least 31 %, more likely even higher. It was also found that the majorityof the Blazhko variables show triplet structures in their frequency spectra andthat in 89 % of these cases, the peak with larger amplitude is on theright-hand side of the main pulsation component.

Bright Blazhko RRab Lyrae stars observed by ASAS and the SuperWASP surveys