Powernumpty

Easiest route is probably something like the TP-Link nano routers (E.G. Tl-wr802n), powered from 5V.
It connects to the Kiwi/BB via ethernet cable.
That set up is good because it offers more placement options for best WiFi link.
I have used that one and it was easy to set up as the Kiwi is treated just like any other wired device connected to the nano router.

Are you running external WSPR decode (with a recorder.py etc.) or the WSPR extension? running external decoding would be a better move in this setup I believe.

The extension is simple but there are benefits to using the external decodes, the detection rate is higher by default.

Easiest route is probably something like the TP-Link nano routers (E.G. Tl-wr802n), powered from 5V.
It connects to the Kiwi/BB via ethernet cable.
That set up is good because it offers more placement options for best WiFi link.
I have used that one and it was easy to set up as the Kiwi is treated just like any other wired device connected to the nano router.

I'm sure there are many older supplies designed when compliance was "a thing", I've got a few that seem pretty good but I'm keen to find resonable current options for those people without decent "junk" reserves ;-).
I hadn't tried these tiny PCB's simply as I had assumed the noise would be too intrusive but a comment on here prompted me to look. Linear supplies are getting harder to find more so considering switchers are often listed a "linear" now. In fact I'm getting annoyed with the amount of fake carp on Ebay, can't trust many listings now around power supplies, I still look for older stuff with full traceable approvals.