TUBE: 6V6GT (sheet also covers 5V6-GT)
SOURCE FILE: sheets/093/6/6V6GT.pdf
MANUFACTURER: GENERAL ELECTRIC (GE Electronic Tubes, Schenectady NY) — ET-T914
YEAR: March 1955 (3-55; supersedes ET-T351D dated 6-53)
TYPE (per PDF): BEAM PENTODE [= beam power tetrode]
PAGES: 6 (pages 1-2 data, pages 3-6 curves only)

===== PAGE 1 =====
GE — 6V6-GT / 5V6-GT — BEAM PENTODE
"The 6V6-GT is a beam-power pentode designed for use in the audio-frequency power output stage of TV and radio receivers... may also be used as a triode-connected vertical-deflection amplifier."
"Except for heater ratings, the 5V6-GT is identical to the 6V6-GT" (5V6 = controlled-warm-up heater for series strings).
ELECTRICAL: Cathode coated unipotential.
  Heater Voltage: 5V6=4.7V / 6V6=6.3 V
  Heater Current: 5V6=0.6 / 6V6=0.45 A
  Heater Warm-up Time: 11 s (5V6)
DIRECT INTERELECTRODE CAPACITANCES (approx):
  Grid#1 to Plate = 0.7 µµF
  Input = 9.0 µµF
  Output = 7.5 µµF
MECHANICAL: Mounting any; Envelope T-9 glass; Base B6-81/B7-7 intermediate shell octal or B6-84/B7-59 short intermediate shell octal.
BASING DIAGRAM (RETMA 7AC):
  Pin1=No Connection (omitted on B6-81/B6-84); Pin2=Heater; Pin3=Plate; Pin4=Grid#2(screen);
  Pin5=Grid#1; Pin7=Heater; Pin8=Cathode and Beam Plates.
MAXIMUM RATINGS (Design-Center), columns Class A1 Amplifier / Vertical-Deflection Amp (Triode Connection):
  DC Plate Voltage = 315 / 315 V
  Peak Positive Pulse Plate Voltage = - / 1200 V
  Screen-Supply Voltage = 315 / - V
  Screen Voltage = 285 / - V
  Peak Neg Grid#1 Voltage = - / 250 V
  Plate Dissipation = 12 / 9.0 W
  Screen Dissipation = 2.0 / - W
  DC Cathode Current = - / 35 mA
  Peak Cathode Current = - / 105 mA
  Heater-Cathode Voltage: DC component 100/100 V; total DC and peak 200/200 V (pos); neg 200/200 V
  Grid#1 Circuit Resistance: fixed bias 0.1/- MΩ; cathode bias 0.5/2.2 MΩ
FOOTER: GENERAL ELECTRIC

===== PAGE 2 =====
CHARACTERISTICS AND TYPICAL OPERATION — CLASS A1 AMPLIFIER (3 cols):
  Plate Voltage: 180 | 250 | 315 V
  Screen Voltage: 180 | 250 | 225 V
  Grid#1 Voltage: -8.5 | -12.5 | -13.0 V
  Peak AF Grid#1 Voltage: 8.5 | 12.5 | 13.0 V
  Plate Resistance: 50000 | 50000 | 80000 ohms
  Transconductance: 3700 | 4100 | 3750 µmho
  Zero-sig Plate Current: 29 | 45 | 34 mA
  Max-sig Plate Current: 30 | 47 | 35 mA
  Zero-sig Screen Current: 3.0 | 4.5 | 2.2 mA
  Max-sig Screen Current: 4.0 | 7.0 | 6.0 mA
  Load Resistance: 5500 | 5000 | 8500 ohms
  THD: 8 | 8 | 12 %
  Max-sig Power Output: 2.0 | 4.5 | 5.5 W
PUSH-PULL CLASS AB1 (two tubes; 2 cols):
  Plate Voltage: 250 | 285 V ; Screen Voltage: 250 | 285 V ; Grid#1: -15 | -19 V
  Peak AF g-g: 30 | 38 V ; Zero-sig Ia: 70 | 70 mA ; Max-sig Ia: 79 | 92 mA
  Zero-sig Ig2: 5.0 | 4.0 mA ; Max-sig Ig2: 13 | 13.5 mA
  Eff Load (P-P): 10000 | 8000 ohms ; THD: 5 | 3.5 % ; Pout: 10 | 14 W
AVERAGE CHARACTERISTICS, TRIODE CONNECTION:
  Va=250V; Vg1=-12.5V; µ=9.8; Rp=1960 ohms; gm=5000 µmho; Ia=49.5 mA; Vg1(Ib=0.5mA)=-36 V
FOOTER: GE — ET-T914 page 2

===== PAGE 3 =====
[courbes seules] Average plate characteristics: Ib & Ic2 vs plate volts, Ec2=250V, Ec1 0 to -30V (top); plus +15 to -20V grid family (bottom).

===== PAGE 4 =====
[courbes seules] Average plate characteristics: Ib vs plate volts, Ec1=0, Ec2 100-250V (top); triode-connection plate characteristics screen-tied-to-plate (bottom).

===== PAGE 5 =====
[courbes seules] Average transfer characteristics: Ib vs Ec1 at Eb=250V, Ec2 100-250V (top); Ic2 vs Ec1 (bottom).

===== PAGE 6 =====
[courbes seules] Operation characteristics: power output, distortion, plate & screen current vs load resistance (Eb=Ec2=250, Ec1=-12.5, Esig=8.8Vrms).

NOTE: 'BEAM PENTODE' = GE's term for beam power TETRODE. Declared TETRODE = CONFIRMED. Octal 7-pin (RETMA 7AC), Vh=6.3V/0.45A. Va max 315V, Vg2 max 285V, Pa 12W, Pg2 2W, Vh-k 200V. Caps Cin=9.0, Cout=7.5, Cg1-p=0.7pF. Triode-connected µ=9.8.