Eimac specifies 890W for a single tube at 3.5KV plate voltage and 740W at 3kV. 73 Peter, DJ7WW -----Original Message----- From: Amps [mailto:amps-bounces at contesting.com] On Behalf Of Kim Elmore The 3-500Z is an excellent tube, but 1500 W isn't reasonably available out of a pair, even at increased plate voltage