The trouble is, I have no way of knowing what the current requirements of the camera are. I didn't install it so don't know the model and it is mounted atop a 25ft girder that I cannot safely lean a regular ladder against. Also, the end of the girder has been set in concrete so there is no easy way of taking that down, either.
I have bought a replacement toroid - 2x115v primaries, 2x12v secondaries.
I wired the 2x115v primaries in series for the mains input, and the 2x12v secondaries in series for a 24v@1.67A output. When I read the output with a multimeter it is showing around 26v - would this be within tolerance for a typical PTZ?