Antennas-Amplifiers LPF50 HF/6-Meter 3000W Low Pass Filters are designed for use with modern HF and 6-meter linear amplifiers and transceivers up to 3kW. They operate across a passband frequency range of 1.5–54MHz with a low insertion loss of 0.06dB, maintaining signal integrity while suppressing harmonic frequencies generated by the amplifier. These filters feature a 50-ohm nominal impedance and come equipped with SO-239 coaxial connectors. Precision-tuned and verified using a calibrated HP8753ES network analyzer, they deliver low return loss and consistent attenuation performance. The LPF50 3kW Low Pass Filters support flexible mounting in any position with the included 5mm mounting holes. Exceptional Performance is achieved through careful design, tuning, and component selection.

Additional Features and Specifications:

• Passband: 1.5 – 54MHz

• Insertion Loss: 1.8- 29.7MHz: <= 0.06dB

• Input Return Loss: Better than -32dB

• Maximum SWR on any frequency: <= 1.05

• Nominal Impedance: 50-Ohm

Attenuation:

• FM 88MHz: > 40dB

• FM 108MHz: > 45dB

• AirBand 118MHz: > 40dB

• AirBand 127MHz: > 39dB

• 2m Band 144–148MHz: >= 41dB

• 2m Harmonic 288.2MHz: >= 62dB

• 1.25m Band 222MHz: >= 54dB

• 70cm Band 430-450MHz: >= 65dB

Maximum Power Input at 50% Duty Cycle:

• SWR 1:1: 3000W

• SWR 1:1.5: 2100W

• SWR 1:2: 1700W

• SWR 1:3: 1300W

Coaxial Connectors: Silver-plated Teflon UHF SO-239 Female

Fan Power Consumption: +12VDC, 200mA

Filter Size: WxHxD 8.27 x 5.31 x 4.33 in. (210 x 135 x 110mm)

Weight: 2.20 lbs. (1.0kg)

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

Working Environment: Indoor