Electrovacuum pentode – 6F6S is intended for use in generators and in output (single-push, push-pull) stages of low-frequency signal amplifiers, providing a sufficient increase in the level of electromagnetic oscillations using positive or negative feedback. The closest foreign analogues are 1611, KT63, 6F6. The radio tube has a figured glass bulb, to which an octal base with six contact pins is attached.
• Voltage specified by the technical specifications at the anode: 250 V.
• Nominal current in the anode circuit: 34 mA.
• Bias voltage on the control grid: – 16.5 V.
• Maximum output power of the pentode: 3.2 W.
• Constant current in the glow circuit: 0.7 A.
• Optimal resistance in the load circuit: 7 kOhm.