Masthead Amplifier

Low Noise Mast Head Amplifier

One UHF 38dB Gain input and One VHF 30dB Gain input

When receiving and amplifying weak digital and or analogue signals, two factors are critical: The amplifier noise figure and the coaxial cable distance from the antenna to the amplifier.
The KMA421 is a Low Noise Amplifier resulting in weaker digital and/or analogue signals reliably amplified.
To be mounted as close as possible to the TV aerial. Typically at the antenna mast. High Quality weatherproof housing rated IP53.

Designed using the latest semiconductors and SMD technology to offer the best performance and reliability.
Inter stage and tilted gain control in UHF, to keep low noise figure and to compensate cable losses on high frequency signals. Fully screened with F-connectors. Fully transparent to digital and analogue TV. Provides much better results than amplifiers fitted indoor or behind the TV because signal is boosted before the coaxial
cable losses. Separate Power Supply Unit (MP181) provides 24VDC power up to the amplifier through the coaxial cable.

 

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Description

RF Inputs Connectors 2 x “F” connector female. Impedance: 75 Ohm
Input 1 UHF: 470 to 862MHz. Channel 21 to 69.
Input 2 VHF : BI 47 to 68 MHz and BIII 174 to 230MHz. Channel E2 to E4 and E5 to E12
Max. Input Level 80dBµV
Gain UHF Max: 38 dB. Adjustment (Interstage): 0 to -20dB
VHF Max: 30 dB. Adjustment: 0 to -20dB
Noise Fig. UHF 3.5 dB
VHF 4.0 dB
RF Output Connectors 1 x “F” connector female. Impedance : 75 Ohm
Max. Out Level 107dBµV EN50083-3 IM3=-60dBc
General Dimensions Device: 115x155x48mm
Fixing Nylon-tie up to 60mm mast
DC Power 24VDC
Power Consumption 40mA
IP Rating Weatherproof housing rated IP53

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