TUBE: 6EM7
SOURCE FILE: sheets/049/6/6EM7.pdf
MANUFACTURER: RCA (Radio Corporation of America)
YEAR: 8-60 (pages 1-6) + 5-61 reprint (pages 7-13)
PAGES: 13 (pages 1-2 data, 3 dims, 4-6 curves; pages 7-8 data reprint, 9 dims, 10-13 curves)
LANG: en

===== PAGE 1 =====
RCA 6EM7 — DUAL TRIODE — With High-Mu Unit and Low-Mu Unit
GENERAL DATA
Electrical: Heater, for Unipotential Cathodes:
 Voltage (AC or DC)  6.3 +-10%  V
 Current at 6.3 V    0.925  A
Direct Interelectrode Capacitances (approx.):
                     Unit No.1 | Unit No.2
 Grid to plate        4.8  | 10   pF
 Grid to cathode and heater  2.2 | 7  pF
 Plate to cathode and heater 0.6 | 1.8 pF
Characteristics, Class A1 Amplifier:
                     Unit No.1 | Unit No.2
 Plate Voltage        250  | 150  V
 Grid Voltage         -3   | -20  V
 Amplification Factor 68   | 5.4
 Plate Resistance (approx)  40000 | 750  ohms
 Transconductance     1600 | 7200 umhos
 Plate Current        1.4  | 50   mA
 Plate Current for plate volts=60 & grid volts=0  - | 95  mA
 Plate Current for grid volts=-28  - | 10  mA
 Grid Voltage (approx) for plate mu=10   -5.5 | -  V
 Grid Voltage (approx) for plate mu=100  -   | -45 V
Mechanical: Operating position any. Max overall length 3". Max seated 2-7/16". Max dia 1-9/32".
Bulb T9. Base: Short Intermediate-Shell Octal 8-Pin with External Barriers (JEDEC Group 1, B8-58). Basing 8BD.
Pinout (BOTTOM VIEW, basing 8BD):
 pin1 = Grid of Unit No.2 (2G)
 pin2 = Plate of Unit No.2 (2P)
 pin3 = Cathode of Unit No.2 (2K)
 pin4 = Grid of Unit No.1 (1G)
 pin5 = Plate of Unit No.1 (1P)
 pin6 = Cathode of Unit No.1 (1K)
 pin7 = Heater (H)
 pin8 = Heater (H)

===== PAGE 2 =====
VERTICAL-DEFLECTION OSCILLATOR — Values for Unit No.1
Maximum Ratings (525-line, 30-frame, Design-Maximum):
 DC PLATE VOLTAGE           330  max V
 PEAK NEGATIVE-PULSE GRID VOLTAGE  400  max V
 CATHODE CURRENT: Peak 77 max mA; Average 22 max mA
 PLATE DISSIPATION          1.5  max W
 PEAK HEATER-CATHODE VOLTAGE: Heater neg w.r.t. cathode 200 max V; Heater pos w.r.t. cathode 200 max V
 Grid-Circuit Resistance (grid-resistor-bias or cathode-bias)  2.2  max Mohm
VERTICAL-DEFLECTION AMPLIFIER — Values for Unit No.2
Maximum Ratings (525-line, 30-frame):
 DC PLATE VOLTAGE           330  max V
 PEAK POSITIVE-PULSE PLATE VOLTAGE  1500  max V
 PEAK NEGATIVE-PULSE GRID VOLTAGE  250  max V
 CATHODE CURRENT: Peak 175 max mA; Average 50 max mA
 PLATE DISSIPATION          10   max W
 PEAK HEATER-CATHODE VOLTAGE: 200 max V both
 Grid-Circuit Resistance  2.2  max Mohm
Operating considerations: bulb hot during operation; ensure free air circulation.

===== PAGE 3 =====
[dimensional outline drawing] T9 bulb, JEDEC Group 1 NRB8-58 base, max 3" length, max 2-7/16" seated, max 1-9/32" dia. Not tabular data.

===== PAGE 4 =====
[courbes seules — pas de donnees tabulaires] Average Plate Characteristics Unit No.1 (Ef=6.3V), Ip vs plate volts.

===== PAGE 5 =====
[courbes seules — pas de donnees tabulaires] Average Characteristics Unit No.1: mu, rp, gm vs grid volts.

===== PAGE 6 =====
[courbes seules — pas de donnees tabulaires] Average Plate Characteristics Unit No.2 (Ef=6.3V), Ip vs plate volts.

===== PAGE 7 =====
RCA 6EM7 DUAL TRIODE — reprint of page 1 (DATA 1, dated 5-61). Same general data.
Indicates a change: Max overall length 2-7/8", Max seated 2-5/16". Basing 8BD identical.

===== PAGE 8 =====
Reprint of page 2 (max ratings, vertical-deflection oscillator Unit1 & amplifier Unit2). Same values.

===== PAGE 9 =====
[dimensional outline drawing reprint] T9 bulb, max 2-7/8" length, max 2-5/16" seated. Not tabular data.

===== PAGE 10 =====
[courbes seules — pas de donnees tabulaires] Average Plate Characteristics Unit No.1 (reprint).

===== PAGE 11 =====
[courbes seules — pas de donnees tabulaires] Average Characteristics Unit No.1 mu/rp/gm (reprint).

===== PAGE 12 =====
[courbes seules — pas de donnees tabulaires] Average Plate Characteristics Unit No.2 (reprint).

===== PAGE 13 =====
[courbes seules — pas de donnees tabulaires] Average Characteristics Unit No.2: mu, rp, gm vs grid volts (Ef=6.3V).