Yeah, not having a connector on the Airnav antenna makes it somewhat difficult to get the LNA up there.
Don’t know when i can borrow the lift again, could be interesting to see if it makes a difference moving the LNA. But then i need some sort of PoE i guess.
I’m running gain at 49.6 - I’ve seen other running -10 without problems, i seem to remember his name is Chris.
I don’t see problems here - I’ll say it’s normal; (Notice: it was set to a much lower value for 15 minuttes, just before the spike at -10 gain for same 15 minuttes) - I did not make a difference on max (or narrow) range. So everything from 32 to 49 seems to work equal on my setup.
Maybe not enough traffic or far away. I am located in the middle of germany with lots of traffic (peak today was 117 aircraft) and lots of aircraft passing by in less than 10km.
The noise level is way to high if set to 48 or higher. -10 gives me a noise of up to 15%.
I am currently running at 42.1 which i am totally fine with. Any higher gain will reduce the number of positions reported
There’s no RP-SMA in the setup, all connectors are (gently) heightened with a 8mm wrench - I can see one of the receivers are going at ~10% strong messages, need to lower that a little. Maybe to 48.
Yes, i can confirm previous setting was 49.6. Edited it down now for a test.
Anyway, @chrislfa also seems to be running a high gain with the Uputronics LNA? Maybe he’ll chime in with his experience…
But as said 32 in gain seems to give almost same range.
What about dubious claim of 12 dB gain?
Of course gain cannot be measured without very costly equipment, but sided by side trial run with a known antenna such as Fligtaware 26"/66cm antenna will give good idea.
Yeah, I’m not smart enough to calculate the theoretical gain on this half-wave design (pop it into 4nec2? I don’t know how to use that program)- it will for sure be in my next round of comparisons since this unit could live in an outdoor environment if needed - the price is right and it’s properly tuned to boot. It could end up being the new low-cost winner since it’s not very obtrusive either.