On Sat, Aug 2, 2014 at 12:28 AM, george fritkin via TenTec < tentec at contesting.com> wrote: > 200 to 250 watts AM results in 800 to 1000 watts PEP at 100% modulation. > Three 811 tubes can not handle that power. > How about two 3-500Z's? 73, Barry N1EU