The equipment included is not endorsed or tested in any way, nor is any vendor of purchased equipment preferred.
Buy
AM Radios (portable battery-operated radios start at under $10 but check reviews to see how they play.)
cheap am radios – Search (bing.com)
Antennas
HF (loops are effective for point sources but less so for line sources such as some power line RFI)
Professional GA450 Loop Antenna Radio Antenna SDR Short Medium Radio Antenna MW – Walmart.com
VHF (yagis like the ones used for contacting satellites can be effective but keep polarization in mind)
Build
Antennas
HF
plans for building small hf receiving loops – Search (bing.com)
VHF
plans for building vhf yagis – Search (bing.com)
Attenuators
Fox Hunt Offset Attenuator – 3rd Planet Solar / KC9ON
Some equipment that Bob, K1YO, the RFI Team Lead in WMA, has built