My shack is on the second floor, 4m from the ground. My main antenna is a base loaded vertical, using the metal roof (10x6m) as a ground plane.
When I operate in 20 and 40 meters, it's pretty acceptable. I don't seem to have RF in the shack. But on 80m I do: I have a small power supply with a digital readout and I see the current indicator go wild when I transmit.
Does this mean my earthing is not good enough? What can be done to improve it? Will grounding the roof with the shortest possible ground strap help with this situation?