The amp I obtained is 38dB Gain and 0.8dB Noise Figure
that is at 1090, your amplifier is a line amplifier which is very broad
and a much higher noise factor which means yours is great for
amplifying at the antenna to send down a long length of coax.
Mine is going to detect very weak signals at the antenna , a high gain antenna,
and then boost up a hell of a lot to send it down the coax.
What I’ve noticed is that if an ADSB signal does not have sufficient signal strength
it will not display a position and will miss the gps position. IF its got enough signal
strength, the GPS gets displayed. A poor antenna will show less gps positions and
more non adsb transponder signals.
(correct me if I’m wrong on this)
You want the “lowest noise factor”, to amplify the signals at the extreme bottom of the noise level
that can barely be detected. When I listen to digital signals, it never ceases to amaze me
how the machine can detect the data when a human cannot even detect that a signal exists.
Its a bit like listening for Voyager 1.
My latest antenna is a 8 stage J-pole co-linear. Next version will be more elements and made of
solid copper pipe that enables more accurate measurements.
So far, without an amp, and using a old oil can, its getting occasionally over 200 nm in 3 areas of the compass. NW N and ESE, I’m aiming at adding some significant distance to it.