Product Overview
What it is: A metal-shielded PTI Comline Model 1633 crystal filter module rated at 21.4 MHz. Designed for intermediate frequency (IF) signal filtering in radio and communication circuits.
What it’s used for: Commonly used in radio receivers, ham radio equipment, communication systems, signal processing boards, and IF stages where selective frequency filtering at 21.4 MHz is required. Suitable for repair, restoration, or RF circuit design projects.