Will I see a good SNAP when I hook the TX chassis to the ground rod?
There's only one way to find out!!
I'd plug in the TX, turn it on and measure the voltage first. Ifn a cap failed in the TX there could be a goodly amount of voltage there.
In either event, if you're adventurous, unplug the TX, connect it to ground and plug it back in!!!
Take PIXS!!