Even before the apocalypse there were/are few radio operators. Afterwards, that number would go drastically down and added to that is the fact that you have to be on the same channel at the same time, atmospheric conditions, etc. Perhaps
the colony did reach radio operators and that's how they got new people, but I'm sure there are
others left in the world. There's just only so much time that can be dedicated to dealing with the rest of the world in a podcast and everything else is left up to our imaginations.
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