I’ve bought a cheap LNA based on SPF5189Z from ebay.
I’ve installed it on my receiving station to improve the bad NF of RTL2832 dongle.
Here you can find some measurements I’ve done on Vector Network Analyzer: https://iz7boj.wordpress.com/2019/04/11/spf5189z-lna-measurements-on-vna/
I’m tuning the gain of the dongle in order to optimize overall S/N. I’ll let you know at the end how it works.