Have seen an example of “bare LNB” reception of QO-100 GEO ham satellite from Andreas Preuss, DL5APR.
That was quite shocking… So tried to reproduce that experiment using my own receiver setup.
Looks like its works fine for stronger signals! I can imagine adding some tricks to the LNB’s horn antenna to improve it’s gain by a few dB. Sounds like it can be an excellent “survival kit” for hiking, field day etc.