Antennas-Amplifiers LPF30 5kW Extreme Power Low Pass Filters are designed for use with designed to be used in-line with Ceramic tetrode linear amplifiers amplifiers up to 5kW. They operate across a passband frequency range of 1.5–29.7MHz with a low insertion loss of 0.085dB, 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 LPF30 5kW Extreme 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 – 29.7MHz

Insertion Loss: 1.8- 29.7MHz: <= 0.085dB

Input Return Loss: Better than -29dB

Maximum SWR on any frequency: <= 1.074

Nominal Impedance: 50-Ohm

Attenuation:

• 50 – 54MHz: >= 75dB

• 70 – 70.5MHz: >= 70dB

• FM 88 – 108MHz: >= 80dB

• 144 – 148MHz: >= 100dB

• 222MHz: >= 100dB

• 430 – 440MHz: >= 100dB

Maximum Power Input at 50% Duty Cycle:

• SWR 1:1: 5000W

• SWR 1:1.5: 3300W

• SWR 1:2: 2700W

• SWR 1:3: 2100W

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

Fan Power Consumption: +12 VDC, 200mA*

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

Filter Size: WxHxD 11.61 x 4.92 x 5.12 in. (295 x 125 x 130mm)

Weight: 2.87 lbs. (1.3kg)

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

Working Environment: Indoor