EF86

TECHNICAL DATA TAD EF86 / 6267 Premium Select Low Noise AF Pentode The TAD™ EF86 / 6267: is a glass envelope miniature pentode for highquality small signal amplification in sensitive input stages The TAD™ EF86 / 6267 is likewise suitable for many High-End-Audio devices and microphone preamps as well as the famous VOX AC amplifier line from the early 60´s. The TAD™ EF86 / 6267 is a faithful reproduction in shape and tone of yesteryears EF86´s. Characteristics of a bogey tube: Electrical Heater Voltage (AC or DC) in Volts Heater Current in mA Heating Cathode-to-heater potential, max. Cathode positive: Cathode negative: Direct interelectrode capacitances, max.*** Grid 1 to all except plate Grid 1 to plate Plate to all except Grid 1 Grid 1 to heater Mechanical Operating Position Base Dimensions: Height Seated height Diameter Cooling Approximate net weight ***Without external shielding, nominal values AF Power Amplifier Maximum ratings DC plate voltage Grid 2 voltage Positive DC Grid Voltage Negative DC Grid Voltage Plate dissipation Grid 2 Dissipation Bulb temperature (surface hottest point) Cathode Current 6.3+/-0.5 200+/- 10% Indirect 100 V 50V 3.8 pF 0.05 pF 5.1 pF 0.0025 pF Any E9-1, Small Button 9 Pin 55.6 mm 49.2 mm 22.2 mm conventional 15 g 300 V 200 V 0V -100 V 1.0 W 0.2 W 170°C 6 mA RT-EF86/6267 Pentode Connection B+ / V RA / kΩ RG2 / kΩ RK / kΩ VOut / VRMS VOut / VIN THD / % IA / mA 200 100 390 1,00 40,3 100,8 4,0 1,5 250 100 390 1,00 43,7 109,3 2,8 1,9 300 100 390...