TUBE: EL34
SOURCE FILE: sheets/164/e/EL34.pdf
MANUFACTURER: Svetlana Electron Devices (St. Petersburg, Russia; US offices AL/CA)
YEAR: 4/97 (April 1997)
PAGES: 2 (page 1 data, page 2 typical operation + curves)
TYPE (per PDF): High Performance Audio Power Pentode (EL34/6CA7)

===== PAGE 1 =====
SVETLANA TECHNICAL DATA — EL34/6CA7 — High Performance Audio Power Pentode
Glass envelope power pentode, plate dissipation 25 W (convection cooling). Pentode, ultralinear or triode connection. Indirectly-heated oxide cathode. Manufactured to original Mullard design.

Electrical
Heater Voltage (AC or DC): Min 5.7 / Nom 6.3 / Max 6.9 V
Heater Current: 1.6 A
Cathode: Oxide-coated, unipotential
Cathode-to-heater potential, max: 100 V
Direct interelectrode capacitances, max (without external shielding, nominal):
  Grid no.1 to cathode and g3, g2, base sleeve and heater  < 16 pF (Cin/Cgk)
  Plate to cathode and g3, g2, base sleeve and heater       < 0.6 pF (Cout/Cak)  [NOTE: unusually low; spec is "max" with full shield]
  Grid no.1 to plate                                        < 1.1 pF (Cga)

Mechanical
Operating Position: Any
Base: JEDEC #8ET, octal, 8-pin
Max dimensions: Height 113 mm; Seated height 98 mm; Diameter 32 mm
Cooling: Convection ; Net weight ~60 g
Pinout (Bottom view, Octal): pin1=G3; pin2=H(heater); pin3=P(plate); pin4=G2; pin5=G1; pin6=NC; pin7=H(heater); pin8=K(cathode)

AF Power Amplifier — Maximum ratings
DC plate voltage                 800 V
Grid no.2 DC (screen) voltage    500 V
Grid no.1 (control) voltage     -100 V
DC cathode current               150 mA
Plate dissipation                25 W
Grid no.2 DC (screen) dissipation 8 W
Bulb temperature (hottest point) 250 C

===== PAGE 2 =====
Typical Operation — AF Power Amplifier, Class A1 (single tube)
Plate Voltage                    250 V
Grid 2 Screen Voltage            250 V
Grid 1 Control Voltage*         -14 V
Peak AF Grid 1 Control Voltage   14 V
Zero Signal Plate Current        100 mA
Maximum Signal Plate Current     105 mA
Zero Signal Grid 2 Screen Current (avg)  15 mA
Transconductance (nominal)       11,000 uS  (= 11 mA/V)
Load Resistance                  2000 Ohms
Output Power at 5% distortion    10 W
* Approximate value (set to zero signal plate current)

[courbes seules — pas de données tabulaires]
(Transfer: plate current vs grid voltage, Plate V=250, Screen V=250/300/400; Plate characteristics: plate current vs plate voltage, Screen V=250, Grid V=0/-5/-10/-20/-30)