Where next~? (Hardware upgrades)

HAB amp 1090MHz ADS-B Filtered Preamp ?

overall noise figure of the unit to 0.75dB
PSA4-5043+ Ultra Low Noise Figure, 0.75 dB

For LNA important parameter is Noise Figure.

PGA-103+ : Low Noise Figure, 0.6 at 1 GHz; 0.9 dB at 2 GHz
SPF-5189Z : Noise Figure 0.55 dB at 0.9 GHz
MGA-82563 : Noise Figure 2.10 dB at 1.0 GHz

Another option is to extremely shorten the length of the cable and place the receiver near the antenna.

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