In regards to protection from nuclear blast and fallout I believe the following Army Field manual (FM 3-4, Nuclear Protection) circa 1992 is helpful https://www.globalsecurity.org/wmd/library/policy/army/fm/3-4/Ch4.htm Sandbags are very effective and inexpensive ways of shielding from radiation, Home Depot sells empty sandbags 55 cents each. r Here are more useful resources Nuclear Protection video 1 (a bit old but useful) Nuclear Protection video 2 (army film) https://vimeo.com/336361351
One of the most important components of a shortwave radio is the antenna, I have a Tecsun PL-600 with SSB and external antenna jack. I listen to it all the time, and I found that by itself gets very few stations (I live in Phoenix AZ). I see online all these HAM radio guys getting tons of stations, I thought, what is wrong with my setup?? Well I found it was my antenna, I started putting up many feet of wire, the reception got better but still not what I expected, then I heard about loop antennas and I bought the following https://www.ebay.com/itm/MLA-30-Loop-Antenna-Active-Receiving-Antenna-500kHz-30MHz-for-Short-Wave-Radio-/363694783608 This made all the difference, it reduces static tremendously, I can get far more stations with the above antenna. Oh, you’ll need an adapter https://www.ebay.com/itm/SMA-Bulkhead-Female-to-3-5mm-1-8-TS-Male-50-RG316-Coax-Low-Loss-RF-Cable-/274146007688 Good luck