Total posts : 45366
Yes, the TECSUN series of radios mentioned by PhilB are a must have for Part 15 radio. The corrected Model No. I have is PL-310, and it is very informative to walk near and far in the field of a Part 15 AM signal and see what it’s really doing.
You can map out the actual pattern using the numbers from the read-out, and see where it is strong and where it is weak. AM signals sometimes take unexpected shapes. For example, strength can pick up along the path of overhead electric lines and go farther than elsewhere in the pattern.
Following an AM signal by car using streets may not be telling you the whole story.
Walking around on the ground with the TECSUN can reveal a whole other dimension about what your signal is doing.
Then join the ALPB.