Big Katuna wrote:
My inside amp and transmitter and outside antenna are no more than 10’ apart.
Ive never had a problem.
It often depends on construction.
Wood or aluminum frame? Fiberglass or aluminum exterior?
A metal shell - like an Airstream - is effectively a Faraday cage, nicely isolating the inside and outside antenna signals from each other. They can't interact.
Whereas fiberglass is basically invisible to radio waves and doesn't block them at all. The outside antenna easily picks up the signal from the amplified internal antenna if they are too close.