That looks better, might be your bias-t is doing something strange.
How did you switch on the bias-t anyway?
I did use this guide: https://www.rtl-sdr.com/getting-the-v3-bias-tee-to-activate-on-piaware-ads-b-images/
Forgot to mention i’m using the Flightaware Prostick Plus instead of the rtl sdr V3 dongle
I’m confused now
Does that combo work for you now?
To deactivate the builtin bias-t:
sudo systemctl stop dump1090-fa sudo rm /etc/systemd/system/dump1090-fa.service.d/bias-t.conf ~/rtl_biast/rtl_biast -b 0 sudo systemctl restart dump1090-fa
Then you should be able to use the rtl-sdr v3 with the uputronics amp as well.
Looks like it does, but its getting the same results as the LNA,
Setup: PI -> Flightaware Pro stick plus -> Uputronics filtered preamp -> 15m coax -> antenna
Gain is 29.7, percentage of strong messages: 6,053
I will try this tomorrow, thanks for all your help!
Maybe the problem was only present for the scan.
If you want to do two more scans with the rtl-sdr v3 + LNA combo, then do one scan with the first command issued before the scan and then the second scan with the other command issued before the scan.
~/rtl_biast/rtl_biast -b 0 ~/rtl_biast/rtl_biast -b 1
At least one of those scans should be completely black
And if the not black scan shows noise, then there is a problem that’s either with the LNA or with bias-t.
You said the scan with the v3 + uputronics driven by the v3 bias-t was bad as well, yes?
Yep thats right. Could i do something wrong with activating the bias tee? I did just copy-paste on the RTL-SDR guide for activating.
There are some cases where the activation just doesn’t work.
But i would expect a black spectrum and no planes in that case.
The two scans with manually activating and deactivating the bias-t before the scan should make it clear.
As my soldering iron has fried itself sometimes ago, I used soldering gun to solder the wires from 5V DC adapter to the Bias-T. It seems excessive heat from the powerful soldering gun damaged the delicate copper strip on the PCB, and a little pull on the adapter wire caused the wire to pull out along with the copper strip to which it was soldered .
Have ordered these two. These do NOT require soldering, as screw terminals have been provided for DC supply wires.
The reason for ordering 2 is that these have different sma terminals. One has female/female, and other has male/female. This gives flexibility in different configurations.