OK folks, it looks like either the cheap/generic PoE system or the $1 DC-DC converter I’m using is starting to break down. It’s lasted all summer and has powered my Pi3B+ but over the last couple of weeks I’ve started to get the throttling errors again.
Bearing in mind that the equipment up the mast is relatively expensive, I don’t want to risk anything going horribly wrong and letting the magic smoke out.
It’s also time to get the Pi4 up there instead of the 3B+ so I need to do this properly. I have CAT6 cable from the shack to the top of the mast so it makes sense to carry on using PoE.
I’d like to replace my existing PoE injector with a proper 802.3af jobbie and something a bit better to get the voltage into the Pi.
Is the official RPi beefy enough to power the Pi4 and the Airspy Mini? I’ll do the same as I am now and take a direct feed from the GPIO to the bias-tee injector for the LNA so it needs to power that as well. If not, are there any suitable alternatives?
This is the PoE injector I have in mind. Will this do the job at the bottom end?