RF1199 Ideal Front-End Filter for 291.4 MHz Wireless Receivers Low-Loss, Coupled-Resonator Quartz Design Simple External Impedance Matching Rugged TO39 Hermetic Package Complies with Directive 2002/95/EC (RoHS) Pb 297.4 MHz SAW Filter The RF1199 is a low-loss, compact, and economical surface-acoustic-wave (SAW) filter designed to provide front-end selectivity in 291.4 MHz receivers. Absolute Maximum Ratings Rating Incident RF Power Max. DC vol.