High Power low-pass 9-pole filter is designed to solve difficult interference problems by suppressing out-of-band emission of radio transmitting devices operating in 10M band by adding a tremendous harmonics and hash attenuation, as well as the noise reduction to the electronic equipment (TVs, radios, etc.). It meant to be placed at the output of the amplifier or at the output of the antenna switch.
The filter is a 9-pole passive inductive-capacitive Low Pass Filter constructed in a solid steel, polyester powder coated casing in light gray. For effective heat dissipation active cooling system is provided: the low-noise fan (80x80mm, 12Vdc @0.2 A) is installed on the one end and protected by a metal grid. The filter design is allows its installation directly on a wall or be placed on a rack, shelf, table, etc.
Connections to the load (antenna) and transmitter are utilizing coaxial connectors SO-239.
Each filter is supplied with the data on insertion loss (S21) and return loss (S11) parameters (measured by Vector Network Analyzer), frequency response graph and VSWR. These plots show the most detailed characteristics of each particular filter.
Bandwidth: 0.0 - 32MHz
Band suppression:> 48MHz
Loss in the passband: no more than 0.4dB
The attenuation of the second and subsequent harmonics: above 80dB
The maximum continuous allowable power: 3500W
Allowable peak power: 5000W
VSWR, maximum: 1:1.25
Dimensions: 600x120x110mm (23.62’x 4.72”x4.33”)
Weight: not more than 3kg. (6.6lbs)