Сейчас ищут
Gu50. Смотреть видео: Tube Lab 109 GU50 Kit Monoblock Schematic Walk Through, Sovjet GU50 Military HF Amp 1965, Plasma Flame Generator With The GU 50 Tube HFVTTC, Single Ended Homemade Tube Amplifier On The GU 50 And 6N9S With Lighting Arrows.