On this project I used YU1AW as the basic scheme, with minor corrections.  I dropped the band 1,8 MHz.
                 During my testing, the anode voltage was slightly less than 2.500 V, the anode current was about 0,6 A and at the output
         I got about 950 W.
                 The maximum power I got with this voltage was 1.200 W, but not at all bands. On some bands the power was less by some
         100-150 W.
                 In my opinion, a power of 1 kW is more than enough for DX-ing and a long tube life.