Finally I get the LNA from Ali Express.
It is 64 dB model.
I connect my antenna on RFin port and RTL SDR to RFOut port.
LNA powered with 12V DC and red LED working when powered.
Unfortunately it is deep silent and waterfall in the observation window is deep blue… Even nothing, literally nothing…
I tried to swap the RFin adn RFout ports, I thought may I connect them wrong way, no change, deep blue…
Like even antenna is not connected at all…
Someone can help me out?
How can I solve this problem?
Thanks a lot,