Wally I thought 12 Watts was 100% max dissipation for a 6V6GT and 14 Watts was 100% for the 6V6GTA?? I've never really understood if there's actually a difference between the two or not? I think I remember someone saying all NOS 6V6s are rated for 14 watts max and the only reason there's a 2 watt difference had something to do with a change in the way they started labeling the design specifications for tubes back in the day. I decided to go with 12 Watts Max for the NOS RCA 6V6GT I'm using just to play it safe, but from what you're saying it sounds like I could at least bump that up to 14 Watts Max dissipation. I did go through last night and measured every 5Y3 rectifier tube that I have. Ended up that it was a Magnavox labeled NOS Sylvania 5Y3GT that brought down the 6V6 readings the most resulting in a Plate Voltage of 376 volts and a Cathode Current of 30.7 mA which is right at 11.5 Watts Max. I do have a 470 ohm 5 Watt wire wound resistor. I'll swap out the 1K cathode resistor with it and report back what that does to things.