12BH7 GEC | Alldatasheet
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‘J h pb TYPE 12BH7 yt « ( f GON , MINIATURE K eae 5 as DOUBLE TRIODE + On: O): MAX C25) a (LOW-MU) ‘eb T BOA (Noval) Base The BRIMAR type 12BH7 is a double triode with two independent low impedance units, It is designed particularly for television application, where one valve is suitable for use as frame oscillator and output stages for wide angle deflection cathode ray tubes. RATINGS Heater Voltage... ove ae wes ve 63) or {i76 volts Heater Current 000 eee ew we 06S, 0.3 amp. Anode Dissipation, each section we wee wee vee 3.5 watts max. Cathode Current, each section ... oo ve we ae 20 mA max. *Peak Positive Pulse Anode Voltage .. “ we oe 1,500 volts max. Peak Cathode Current, each section ... ee oe wee 70 mA max. OPERATING CHARACTERISTICS (As Class A Amplifier, each section) Anode Voltage... wee wee we we a 85 250 volts Anode Current... he oe we oe a 20 11.5 mA Grid Voltage ee oe oe oe we . 0 10.5 volts Mutual Conductance wee oo ase wes we 62 34 mA/V Amplification Factor. eee wee OE 7 Anode Impedance ae eee wee ve w. 3,400 5,500 ohms Grid Voltage for Cut-off ... es wee wee ae 8 —20 volts INTER-ELECTRODE CAPACITANCES + Anode 1 to Anode 2(ca’,a°)« . eee 9 PE Each Section : Input (cin) bee arene tee ee eee ee 80 pF Output (Court) ee eee .. 0.8 pF Grid to Anode (cg,a) vs ee we 2h pF * The duty cycle must not exceed 15 per cent of the scanning cycle, and its duration must not exceed 3 milli-seconds. Ratings are absolute values. + No external shield. VALVES PAGE 133 SSeS
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