YES I HAVE PLAYED WITH GAIN
Hoping someone with some experience with this product confirm what I think might be causing my problems.
Current hardware layout is:
Flightaware 66cm antenna mounted on a 3 meter metal antenna mast ontop of my tin roof in Sydney Australia, total elevation of antenna is 33M above sea level. Flightaware 66cm -> N Type -> BNC -> 5 meters of RG6 Coax (75ohm) -> F Type -> SMA -> Flightaware Pro Plus.
When I use the Flightaware Pro Plus I see 200+ messages per second with range maxing out at 100km. When I swap to a cheapy Rafael Micro R820T tuner with gain at ‘-10’ ill see 120+ messages with range maxing out at 350km.
Ive used a script to cycle through different gain levels (across -10 to 50) with both dongles and sweet spot for the FA seems to be around 33 and the Rafael seems to be -10.
On the FA dongle I seem to lose contact with planes with reported RSSI of -6. on the Rafael they drop out at around -30. That seems weird for the FA to drop out so early.
My thinking is either the filter in the pro plus is squashing out something it shouldnt be, or the amp is over powering the receiver and even with the software gain turned all the way down cant get this under control. I dont believe my hardware setup is causing problems as a straight swap between dongles changes the results so drastically (im aware the coax isnt idea with the impidence mismatch and length)