Hello everybody. Does anyone have any expertise with the Russian GU50/ LS50 tube? I want to build a 50-100 watt amp and drive it direct either with my cobra29 or trusty comstat 25b tuber. I am considering using 6146 tubes or the GU50. I like the dissapation and build quaility of the GU50 and am almost set on using this tube. I need to design a circuit around it or find a proven circuit for using it. I dont have a whole lot of information on this tube and do not think the russian military is willing to give me any pointers either. It would also be helpfull to know what I need to drive it with as far as what tube and input wattage ect. Thanks AARON AKA "The Tube Doctor"