Antennas-Amplifiers 15M High Power Band Pass Filters

Antennas-Amplifiers 15M High Power Band Pass Filters cover the 21.0-21.45MHz frequency range, with power handling capabilities up to 4,000W PEP. They are perfect for multi-station environments like special events, field days and portable operation to protect receivers from excessively strong out-of-band signals. The ATF-5540 is ideal for both reception and transmission and is designed to have an extremely insertion low loss of less than 0.12 dB from 21.0-21.45MHz and significantly suppresses out-of-band interference. All Measurements on the assembled filters were performed with a full 2-port calibrated HP8753ES network analyzer. The ATF-5540 Band Pass Filters are engineered with an advanced filter design, enclosed in a robust powder-coated aluminum enclosure. They are equipped with silver-plated SO-239 connectors, ensuring exceptionally low insertion loss, minimal SWR, and high attenuation of out-of-band signals across the entire 15M band.

Additional Features and Specifications:

• Frequency Range: 21.0-21.45MHz

• Insertion Loss: 0.12dB

• Input Return Loss: -35dB

• Nominal Input Impedance: 50 Ohms

• Attenuation on Nearest Band: 35 – 55dB

• Maximum Power Input at 1:1 SWR: 4,000W

• Maximum Power Input at 1:1.5 SWR: 3,200W

• Maximum Power Input at 1:2 SWR: 2,500W

• Maximum Power Input at 1:3 SWR: 2,000W

Mechanical Specifications

• Coaxial Connectors: UHF SO-239 Female

• Dimensions: (WxHxD) 17.91 x 8.66 x 5.31 in. (455 x 220 x 135mm)

• Fan Power Consumption: +12VDC, 200 mA**

• Band Pass Filter Weight: 6.17 lbs. (2.8kg)

• Mounting: Any position, 0.20 in. (5mm) mounting holes for wall mounting

• Work Environment: Indoors or Dry location

**Note: Fan usage is not required for power below 1500W.