CIRQTEL FLT/21‑M7‑13/50‑28A/28A-style RF filter

Cir-Q-Tel (S) FLT/21 – 3.6 – 13/50 – 2A/ Filters, S/N: 11 and 3 TNC (F) to TNC (F).
***MPN (S) FLT/21 – 3.6 – 13/50 – 2A/

• CIRQTEL FLT/21‑M7‑13/50‑28A/28A-style RF filter from Cir-Q-Tel Microwave, Inc. — part of a family of coaxial microwave filters that condition signals by attenuating unwanted frequencies.

• The FLT/21 designation refers to a filter model series used in RF/microwave signal paths.

• The numbers (3.6-13/50-2A) in the part number typically relate to frequency range, impedance (50 Ω), and possibly current/variant codes — common in RF low-pass or band-specific filters for communications or test equipment.

• These kinds of filters are often supplied with TNC (female) coaxial connectors on both ends for inline connection between coaxial cables.