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本电路用一只双三极电压放大管12AX7作一级电压放大兼推动。功率管用了名管2A3,以求在成本不高的前提下,获得靓声,是一种“普罗”发烧的有效途径。 推动级非12AX7莫属。其参数如下:Uf=12.6V,If=50mA,Ug=-2V,Ua(标准值)-250V,Ia=1.2mA,Ri=62,S=16,μ=-100,综合其性能指标,将Ua提到410V,Ia≈0.7mA,Rk=2.0kΩ,可获
The circuit uses a bipolar voltage amplifier tube 12AX7 for a voltage amplification and promotion. Power tube with the name of the tube 2A3, in order to lower the cost of the premise, access Liang, is a “general” fever an effective way. Not to promote non-12AX7 level. The parameters are as follows: Uf = 12.6V, If = 50mA, Ug = -2V, Ua (standard value) -250V, Ia = 1.2mA, Ri = 62, S = 16, μ = -100, Ua mentioned 410V, Ia ≈ 0.7mA, Rk = 2.0kΩ, available