Thanks for the quick reply. Are you referring to Tom's suggestion of removing the wire from the NC terminal of RL-2-1? In an unkeyed state, this would result in the cathodes being connected to the CT and to ~80V through 100k instead of directly connected to 80V (and the CT). I think the idea here is this removes the path from that 80V, protecting the transformer if there's a G-C short...makes sense especially in context of his description of the need, or lack thereof of "cut-off bias". That connection to 80V is supposed to ensure that the tubes are cut off, but I guess that's not needed. Do I have this right?