ну как горовиццО его проблемы
вот как вариант -
http://www.ampeg.com/products/classic/svtvr/index.html на шести 6550..
из датаШыта:
Push Pull Class AB1 Amplifier
Plate Voltage ................................. 600 V
Grid No. 2 Voltage ............................ 300 V
Grid No. 1 Voltage ............................ -16.5 V
Peak Grid No. 1 Voltage........................ 23 V
Plate Current (Zero Signal) ................... 115 mA
Plate Current (Maximum Signal) ................ 273 mA
Grid No. 2 Current (Zero Signal) .............. 4 mA
Grid No. 2 Current (Maximum Signal) ........... 41 mA
Load Resistance ............................... 5000 Ω
Power Output (approx) ......................... 100 W
Total Harmonic Distortion ..................... 2.5 %