Now where did those vise (vice?) grips go?
Oh yeah, that’s right, they were used to attach the RF feed to an AM tower. About ten years ago.
From this view, it looks like whatever tower crew installed this tower could not manage to solder or braze the copper RF connection to the steel tower. The area was then painted, but it looks like there is some corrosion going on between metals.
This is a relatively new tower. Sadly, it is very likely that this station will be going off the air soon. If the station is still on the air come springtime, I will drag the brazing outfit across the field/swamp and fix this. If the station goes dark, then I won’t worry about it.