If you drive two ground stakes in about 20 feet apart and measure the
_AC_ voltage between them, it's typically about a half volt. It's
thousands if lightning hits nearby. (The ambient voltage comes from stray
power line ground differences. The earth levels them out as best it can
but it prefers your electronics when available.)

So you don't want your radio to be part of the path between two grounds in
thunderstorms. Disconnectect from the radio ground when you disconnect
from the antenna, is one approach.
--
Ron Hardin


On the internet, nobody knows you're a jerk.