hey Reece, jumper to ground did cut the volume completely out. I see no terminal board with P C S
terminals. Radio has a 6K6 in place of the 6F6 but didnt think that would make a difference
If the jumper to ground kills the volume, but turning the volume down does not then there are only two choices. Either the ground terminal of the volume pot is not connecting to ground. Or, internally the pot is not connecting to the terminal that eventually goes to ground (break inside of the pot).
You can confirm this with the radio unplugged by measuring the resistance betweeen the center terminal and ground while you turn the volume to minimum. It should go to a very low value (probably under a few hundred ohms). If it does not then it is a matter of determining if the bad connection is internal or external to the pot.