After the advice I received in this thread (Accessing Dongle (AirSpy) through TCP/IP) and I finally received my Airspy Mini and Uptronics Ceramic 1090 MHZ LNA, I was able to build a new PiAware on the Raspberry Pi 4 B 4 GB model.
Many thanks to @wiedehopf for his recommendations and clear concise instructions on getting Airspy Mini and PiAware running on a Raspberry Pi 4.
Now we get to the reason for this post. After following the instructions I got Raspbian Bust Lite, PiAware and Airspy_adsb installed. I configured the AirSpy Mini to supply BiasT to power the Uptronics Ceramic 1090 MHz LNA and sutedown the Pi4. Connected the antenna to the ANT port on the Uptronics LNA, a short jumper from the RX port of the Uptronics LNA to the Airspy Mini dongle. After checking all connections, I powered the RPi4 on. Went to the x.x.x.x:8080 and no aircraft. Hmm. Shut the Rpi4 down, checked all connections again, and powered the RPi4 on again. Still no aircraft. Modified the config file for the Airspy Mini to no longer provide BiasT power, and shut the RPI4 down. Wired the antenna directly to the Airspy mini, and booted the RPi4. Surprise, aircraft are seen. Scratching head, I shut the RPi4 down again, checked the jumper from the Airspy Mini to the Uptronics LNA for continuity, recabled to put the LNA back in, rebooted, change the config of the Airspy Mini to supply BiasT power, restarted airspy_adsb dump1090-fa. Still no aircraft.
Does anyone see something I am doing wrong, as I am at a loss here. Any suggestions are more than welcome.