I have had my ham license (KI7OAZ) for 4 years and I have struggled to find conversations. After finding a youtube post about triangulating (https://www.youtube.com/watch?v=dtICIDDvnPw&t=194s) I realized that WebSDR (Software Defined Radios) are a great way to find activity. You can also hear some of the conversations. One site close to me is Northern Utah SDR (https://www.sdrutah.org/) If you use the TDoA (time difference of arrival) using the KiwiSDR, you can use a map to find other sites around the country and try to triangulate where some of the signals are coming from.
To convert from meters to MHz, use this rough equation 300/meters=MHz or 300/MHz=meters
I am still not sure about relays.
