I've got a little more than that. My supply is 4100V no load and typically 3900 at 1500W out. Paul On 05/01/2017 06:29 PM, Carl wrote: > That tube also neeeds 3000-3500V before it shows good efficiency. > My 2M 3CX1000A7 needs 80W for 1800 out at 3000V but it was a pull when I got > it with socket 35 years ago and still runs the same. > > Carl