AOR ABF128-SMA Airband Filter

The AOR ABF128-SMA is a bandpass filter designed for VHF airband listening. It connects to scanners and wideband receivers with SMA antennas and helps reduce interference from strong unwanted signals in the 108–136 MHz range. By improving signal selectivity, it prevents overload in the receiver and enhances overall reception.

It offers strong out-of-band rejection (about 40 dB below 87 MHz and above 170 MHz) and can be used with external or handheld antennas. While it doesn’t amplify signals, it improves clarity by filtering noise, with only minimal signal loss (around 4 dB).

• Model: ABF128-SMA
• Band Pass Coverage: 108 to 136MHz 
• Nominal Impedance: 50Ω 
• Insertion Loss: 4dB
• Attenuation typically below 87MHz: 40dB minimum
• Attenuation typically above 170MHz: 40dB minimum
• V.S.W.R: Less than 2:1
• Input / Output Connector: SMA-J / SMA-P
• Dimensions (Approx.): 21x 13 x 8mm
• Weight (Approx.): 10g