Antennas-Amplifiers 6510 70cm 50W Narrow Band Pass Filters are low‑insertion‑loss, narrowband 70cm band‑pass filters engineered to deliver clean, interference‑free operation across the 430–450MHz frequency range. Designed for both transmit and receive operation, these filters support up to 50 watts of RF power while maintaining an exceptionally low insertion loss of approximately 0.15dB, ensuring strong signal integrity and protecting overall system sensitivity.

When installed after a 50W transmitter, the filters effectively suppress unwanted out‑of‑band emissions, reducing interference into nearby services. Placed ahead of wideband preamplifiers, they help prevent overload and desensitization caused by strong adjacent‑band signals—making them well suited for weak‑signal work, repeaters, and RF‑dense operating environments.

With their compact size and straightforward installation, 6510 filters integrate easily into a variety of UHF station layouts, providing a practical and reliable way to improve signal cleanliness and system performance.

Key Features

- Narrow, defined 430–450MHz passband

- Ultra‑low insertion loss (~0.15dB)

- Suitable for both transmitting (up to 50W) and receiving applications

- Helps prevent overload and intermodulation in wideband preamplifiers

- Compact, durable construction for easy station integration

Additional Features & Specifications

• 1.8MHz: -105dB

• 3.8MHz: -105dB

• 7.1MHz: -104dB

• 14.15MHz: -104dB

• 21.2MHz: -103dB

• 28.4MHz: -98dB

• 50.1MHz: -83dB

• 70.2MHz: -73dB

• 88MHz: -67dB

• 108MHz: -61dB

• 70.2MHz: -73dB

• 144MHz: -52dB

• 148MHz: -52dB

• 222MHz: -37dB

• 430MHz: -0.145dB, Input RL better than -35dB

• 432MHz: -0.14dB, Input RL better than -35dB

• 440MHz: -0.142dB, Input RL better than -35dB

• 450MHz: -0.14dB, Input RL better than -35dB

Harmonics and interfering signals:

• 864MHz: -39dB

• 930MHz: -42dB

• 1296.1MHz: -41dB