TUBE: 6L6GC
FICHIER SOURCE: sheets/049/6/6L6GC.pdf
FABRICANT: RCA (Radio Corporation of America), Electron Tube Division, Harrison NJ
ANNÉE: 8-60 (août 1960)
PAGES: 10

===== PAGE 1 =====
RCA 6L6-GC — Beam Power Tube
GENERAL DATA
Electrical:
Heater, for Unipotential Cathode:
  Voltage (AC or DC) .... 6.3 ± 10% volts
  Current at 6.3 volts .... 0.9 amp
Direct Interelectrode Capacitances (Approx.):
  Grid-No.1 to plate .... 0.6 µµf
  Grid-No.1 to cathode & grid No.3, grid No.2, and heater (input) .... 10 µµf
  Plate to cathode & grid No.3, grid No.2, and heater (output) .... 6.5 µµf

Characteristics, Class A1 Amplifier:
  Plate Voltage .... 250 volts
  Grid-No.2 Voltage .... 250 volts
  Grid-No.1 Voltage .... -14 volts
  Plate Resistance (Approx.) .... 22500 ohms
  Transconductance .... 6000 µmhos
  Plate Current .... 72 ma
  Grid-No.2 Current .... 5 ma

Mechanical:
  Operating Position .... Any
  Maximum Overall Length .... 4-1/4"
  Maximum Seated Length .... 3-11/16"
  Diameter .... 1.438" to 1.562"
  Bulb .... T-12
  Base .... Medium-Shell Octal 7-Pin (JEDEC Group 1, No.B7-12), Short Medium-Shell Octal 7-Pin (B7-111/B7-119), Short Medium-Shell Octal 6-Pin (B6-148/B6-122)
  Basing Designation for BOTTOM VIEW .... 7AC
Pin 1 - No Connection
Pin 2 - Heater
Pin 3 - Plate
Pin 4 - Grid No.2
Pin 5 - Grid No.1
Pin 7 - Heater
Pin 8 - Cathode, Grid No.3

AF POWER AMPLIFIER — Class A1
Maximum Ratings, Design-Maximum Values:
  PLATE VOLTAGE .... 500 max. volts
  GRID-No.2 (SCREEN-GRID) VOLTAGE .... 450 max. volts
  GRID-No.2 INPUT .... 5 max. watts
  PLATE DISSIPATION .... 30 max. watts

===== PAGE 2 =====
PEAK HEATER-CATHODE VOLTAGE:
  Heater negative w.r.t. cathode .... 200 max. volts
  Heater positive w.r.t. cathode .... 200* max. volts (* dc component must not exceed 100 V)

Typical Operation and Characteristics — Fixed-Bias Operation
Plate Voltage: 200 | 250 | 300 | 350 volts
Grid-No.2 Voltage: 200 | 250 | 200 | 250 volts
Grid-No.1 Voltage: -11.5 | -14 | -12.5 | -18 volts
Peak AF Grid-No.1 Voltage: 11.5 | 14 | 12.5 | 18 volts
Zero-Signal Plate Current: 52 | 72 | 48 | 54 ma
Max.-Signal Plate Current: 57 | 79 | 55 | 66 ma
Zero-Signal Grid-No.2 Current: 3.5 | 5 | 2.5 | 2.5 ma
Max.-Signal Grid-No.2 Current: 5.7 | 7.3 | 4.7 | 7 ma
Plate Resistance (Approx.): 35000 | 22500 | 35000 | 33000 ohms
Transconductance: 5300 | 6000 | 5300 | 5200 µmhos
Load Resistance: 3000 | 2500 | 4500 | 4200 ohms
Total Harmonic Distortion: 9 | 10 | 11 | 15 %
Max.-Signal Power Output: 4 | 6.5 | 6.5 | 10.8 watts

Cathode-Bias Operation
Plate Supply Voltage: 200 | 250 | 300 volts
Grid-No.2 Supply Voltage: 200 | 250 | 200 volts
Cathode Resistor: 186 | 167 | 218 ohms
Peak AF Grid-No.1 Voltage: 11.5 | 14 | 12.7 volts
Zero-Signal Plate Current: 55 | 75 | 51 ma
Max.-Signal Plate Current: 56 | 78 | 54.5 ma
Zero-Signal Grid-No.2 Current: 4.2 | 5.4 | 3 ma
Max.-Signal Grid-No.2 Current: 5.6 | 7.2 | 4.6 ma
Load Resistance: 3000 | 2500 | 4500 ohms
Total Harmonic Distortion: 9 | 10 | 11 %
Max.-Signal Power Output: 4 | 6.5 | 6.5 watts

Maximum Circuit Values:
Grid-No.1-Circuit Resistance: fixed-bias 0.1 max. megohm ; cathode-bias 0.5 max. megohm

AF POWER AMPLIFIER — Class A1 — Triode Connection (Grid No.2 connected to Plate)
Maximum Ratings, Design-Maximum Values:
  PLATE VOLTAGE .... 450 max. volts
  PLATE DISSIPATION .... 30 max. watts
  PEAK HEATER-CATHODE VOLTAGE: 200 max. volts (neg & pos)

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Typical Operation and Characteristics (Triode connection)
                    Fixed Bias | Cathode Bias
Plate Supply Voltage: 250 | 250 volts
Grid-No.1 Voltage: -20 | - volts
Cathode Resistor: - | 490 ohms
Peak AF Grid-No.1 Voltage: 20 | 20 volts
Zero-Signal Plate Current: 40 | 40 ma
Maximum-Signal Plate Current: 44 | 42 ma
Plate Resistance (Approx.): 1700 | - ohms
Amplification Factor: 8 | -
Transconductance: 4700 | - µmhos
Load Resistance: 5000 | 6000 ohms
Total Harmonic Distortion: 5 | 6 %
Maximum-Signal Power Output: 1.4 | 1.3 watts
Grid-No.1 Circuit Resistance: fixed 0.1 ; cathode 0.5 megohm

PUSH-PULL AF POWER AMPLIFIER — Class A1
Maximum Ratings: PLATE VOLTAGE 500 max V ; GRID-No.2 VOLTAGE 450 max V ; GRID-No.2 INPUT 5 max W ; PLATE DISSIPATION 30 max W ; PEAK HEATER-CATHODE 200 max V
Typical Operation (values for 2 tubes):
                Fixed Bias        Cathode Bias
Plate Supply Voltage: 250 | 270 | 250 | 270 volts
Grid-No.2 Supply Voltage: 250 | 270 | 250 | 270 volts
Grid-No.1 Voltage: -16 | -17.5 | - | - volts
Cathode Resistor: - | - | 124 | 124 ohms
Peak AF Grid-No.1-to-Grid-No.1 Voltage: 32 | 35 | 35.6 | 28.2 volts
Zero-Signal Plate Current: 120 | 134 | 120 | 134 ma
Max.-Signal Plate Current: 140 | 155 | 130 | 145 ma
Zero-Signal Grid-No.2 Current: 10 | 11 | 10 | 11 ma
Max.-Signal Grid-No.2 Current: 16 | 17 | 15 | 17 ma
Plate Resistance (per tube): 24500 | 23500 ohms
Transconductance (per tube): 5500 | 5700 µmhos
Effective Load Resistance (Plate to plate): 5000 | 5000 | 5000 | 5000 ohms
Total Harmonic Distortion: 2 | 2 | 2 | 2 %
Max.-Signal Power Output: 14.5 | 17.5 | 13.8 | 18.5 watts

===== PAGE 4 =====
PUSH-PULL AF POWER AMPLIFIER — Class AB1
Maximum Ratings: PLATE VOLTAGE 500 max V ; GRID-No.2 VOLTAGE 450 max V ; GRID-No.2 INPUT 5 max W ; PLATE DISSIPATION 30 max W ; PEAK HEATER-CATHODE 200 max V
Typical Operation (values for 2 tubes):
                    Fixed Bias              Cathode Bias
Plate Supply Voltage: 360 | 450 | 450 | 360 volts
Grid-No.2 Supply Voltage: 270 | 350 | 400 | 270 volts
Grid-No.1 Voltage: -22.5 | -30 | -37 | - volts
Cathode Resistor: - | - | - | 248 ohms
Peak AF Grid-No.1-to-Grid-No.1 Voltage: 45 | 60 | 70 | 40.6 volts
Zero-Signal Plate Current: 88 | 95 | 116 | 88 ma
Max.-Signal Plate Current: 132 | 194 | 210 | 100 ma
Zero-Signal Grid-No.2 Current: 5 | 3.4 | 5.6 | 5 ma
Max.-Signal Grid-No.2 Current: 15 | 19.2 | 22 | 17 ma
Effective Load Resistance (Plate to plate): 6600 | 6000 | 5600 | 9000 ohms
Total Harmonic Distortion: 2 | 1.5 | 1.8 | 4 %
Max.-Signal Power Output: 26.5 | 50 | 55 | 24.5 watts

PUSH-PULL AF AMPLIFIER — Class AB2
Maximum Ratings: PLATE VOLTAGE 500 max V ; GRID-No.2 VOLTAGE 450 max V ; GRID-No.2 INPUT 5 max W ; PLATE DISSIPATION 30 max W ; PEAK HEATER-CATHODE 200 max V

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Typical Operation (values for 2 tubes) — Class AB2 — Fixed Bias:
Plate Voltage: 360 | 360 volts
Grid-No.2 Voltage: 225 | 270 volts
Grid-No.1 Voltage: -18 | -22.5 volts
Peak AF Grid-No.1 to Grid-No.1 Voltage: 52 | 72 volts
Zero-Signal Plate Current: 78 | 88 ma
Max.-Signal Plate Current: 142 | 205 ma
Zero-Signal Grid-No.2 Current: 3.5 | 5 ma
Max.-Signal Grid-No.2 Current: 11 | 16 ma
Effective Load Resistance (Plate to plate): 6000 | 3800 ohms
Peak Grid-Input Power: 140 | 270 mw
Total Harmonic Distortion: 2 | 2 %
Max.-Signal Power Output: 31 | 47 watts
Grid-No.1 Circuit Resistance: fixed 0.1 max megohm ; cathode Not recommended

Notes: (without external shield) ; On 6-pin bases pin 1 & pin 6 omitted ; dc component must not exceed 100 V ; push-pull ultralinear screen up to 500 V ; OPERATING CONSIDERATIONS: bulb hot, free air circulation essential.

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[courbes seules — pas de données tabulaires] — Outline drawing T12 bulb, dimensions 1.562" max/1.438" min dia, 3-11/16" max seated, 4-1/4" max overall. 92CS-1030R1

===== PAGE 7 =====
[courbes seules — pas de données tabulaires] — Average Plate Characteristics, Ef=6.3, Grid-No.1=0, param Ec2=50..400. 92CM-10327

===== PAGE 8 =====
[courbes seules] — Average Characteristics, Grid-No.2=300, Ib/Ic2 vs plate volts. 92CM-10133

===== PAGE 9 =====
[courbes seules] — Average Plate Characteristics Triode Connection, grid No.2 connected to plate. 92CM-9568

===== PAGE 10 =====
[courbes seules] — Average Characteristics (Ic2/Ib vs Grid-No.1, Vp=300, Vg2=300) ; Operation Characteristics Push-Pull Class AB1 (Vp=450, Vg2=350, power output/distortion vs load 2000-10000 Ω). 92CS-10126, 92CS-9575