 It has a lot of headroom and a fat, solid tone. Thanks to its robust construction it is very reliable. Specifications Base: OCTAL Uf = 6,3 V If = 0,9 A Typical Characteristics: Class A1 Amp. Single tube Push-Pull Ua = 250 270 V Ug2 = 250 270 V Ug1 = -14 -17,5 V Ia = 72 134 mA Ig2 = 5 11 mA Ra = 22,5 - k? Ra-a = - 5 k? N = 6,5 17,5 W max 115,0 max 38,0 max 100,0 Capacitances: cg1 = 12,5 pF ca = 10 pF ca/g1 = 1,5 pF Limiting Values: Triode Pentode Ua = 450 500 V Ug2 = 450 450 V Wa = 30 30 W Grid No 1 Circuit Resistance Fixed Bias 0,1 0,1 M? Self Bias 0,5 0,5 M?
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