AP TELETECH HT-D894-3.5/4M LFMBL617C000401 Bandpass FilterAP TELETECH HT D894 3. 5 4M LFMBL617C000401 Bandpass Filter The AP TELETECH HT D894 3. 5 4M LFMBL617C000401 is a specialized bandpass filter engineered for RF signal applications. It is designed to pass a narrow range of frequencies while attenuating signals outside that band, commonly used in telecom and communication systems. Key Specifications Model: HT D894 3. 5 4M Part Number: LFMBL617C000401 Function: Bandpass filtering Frequency Range: Tuned to