Thats true its classy stuff.
The uptronics lna is only 15DB gain and kuhne 30DB.
And there is a bandpass filter in it, Frequency range 1070…1110 MHz
I have worked whit kuhne gear in the pasted and its always realy good stuff.
I see they also have the 2A version with an N-connector for both input and output.
I found some more information with pictures on this Russian site: http://adsbradar.ru/KU-LNA-1090-A-TM-Super-Low-Noise-Amplifier-for-Avionics
Well, all very nice but I fear that 30dB would probably overload the FA dongle, especially the flights at short distance