[Spooks] Typical Freq Ranges

[Falls, Jim]

I am a newbie and am wondering if there are typical freq ranges these folks use? A couple of stations seem to use set freqs and schedules (per the internet sites) but are the majority just out there "somewhere" and you find them by tooling around at the top of the hour? I imagine things shift w/the seasons as propagation changes.

Jim Falls
KG6FWT
Eureka, CA