Product Overview
What it is: A hermetically sealed RF crystal filter module manufactured by Network Sciences (NS), marked with Part No. 726-061-003 and labeled “NETWORK SCIENCES”, with frequency marking 3 kHz.
What it’s used for: Designed for very narrowband signal filtering applications in communication systems, particularly in IF stages requiring precise bandwidth control such as military radios, signal processing units, and specialized RF equipment. Helps isolate signals and reduce noise in low-frequency or narrowband filtering circuits.
