purple 💜 on Nostr: would be near the top end of the "fuck off" level of equipment. actual detection ...

https://www.ettus.com/all-products/usrp-x440/ would be near the top end of the "fuck off" level of equipment. actual detection would consist of a bunch of gnu radio blocks, at least for us non-state actors. https://github.com/gnuradio/gnuradio

cheaper hardware can be had such as things like these https://www.crowdsupply.com/wavelet-lab/xsdr but you'll be quick to note just how "gated" this sort of hardware is to us consumers.

while a fun experiment, if i wanted to spy, i sure as shit wouldn't exfiltrate the data over RF.