TUBE: 6S4A
FICHIER SOURCE: sheets/049/6/6S4A.pdf
FABRICANT: RCA (Radio Corporation of America, Electron Tube Division, Harrison, N.J.)
ANNEE: 1-62 (DATA 1)
PAGES: 3
LANGUE: EN

===== PAGE 1 =====
6S4A — Medium-Mu Triode
9-PIN MINIATURE TYPE, With Heater Having Controlled Warm-Up Time
GENERAL DATA

Electrical:
Heater, for Unipotential Cathode:
  Voltage (AC or DC): 6.3 volts
  Current: 0.6 ± 6% amp
  Warm-up time (Average): 11 sec
Direct Interelectrode Capacitances (Approx.)(a):
  Grid to plate: 2.4 uuf
  Grid to cathode and heater: 4.2 uuf
  Plate to cathode and heater: 0.6 uuf

Characteristics, Class A1 Amplifier:
  Plate Voltage: 250 volts
  Grid Voltage: -8 volts
  Amplification Factor: 16.5
  Plate Resistance (Approx.): 3700 ohms
  Transconductance: 4500 umhos
  Plate Current: 24 ma
  Plate Current for grid volts = -15: 4 ma
  Grid Voltage (Approx.) for plate ua = 50: -22 volts

Mechanical:
  Operating Position: Any
  Maximum Overall Length: 2-5/8"
  Maximum Seated Length: 2-3/8"
  Length, Base Seat to Bulb Top (Excluding tip): 2" ± 3/32"
  Diameter: 0.750" to 0.875"
  Bulb: T6-1/2
  Base: Small-Button Noval 9-Pin (JEDEC No.E9-1)
  Basing Designation for BOTTOM VIEW: 9AC
Pinout:
  Pin 1 - Internal Connection - Do Not Use
  Pin 2 - Cathode
  Pin 3 - Grid
  Pin 4 - Heater
  Pin 5 - Heater
  Pin 6 - Grid
  Pin 7 - Same as Pin 1 (IC, do not use)
  Pin 8 - Same as Pin 1 (IC, do not use)
  Pin 9 - Plate

VERTICAL-DEFLECTION AMPLIFIER
Maximum Ratings, Design-Maximum Values (525-line, 30-frame system)(b):
  DC PLATE VOLTAGE: 550 max. volts
  PEAK POSITIVE-PULSE PLATE VOLTAGE(c): 2200 max. volts
  PEAK NEGATIVE-PULSE GRID VOLTAGE: 250 max. volts

===== PAGE 2 =====
  CATHODE CURRENT: Peak 105 max. ma; Average 30 max. ma
  PLATE DISSIPATION: 8.5 max. watts
  PEAK HEATER-CATHODE VOLTAGE:
    Heater negative w.r.t. cathode: 200 max. volts
    Heater positive w.r.t. cathode: 200(d) max. volts
Maximum Circuit Values:
  Grid-Circuit Resistance (cathode-bias operation): 2.2 max. megohms
Notes: (a) without external shield. (b) 525-line/30-frame FCC. (c) applies when pulse duration <=15% of vertical scanning cycle (2.5 ms). (d) dc component must not exceed 100 volts.

===== PAGE 3 =====
[courbes seules — pas de données tabulaires] AVERAGE CHARACTERISTICS, Ef=6.3 V (plate family + grid current Ic).