SVETLANA TECHNICAL DATA

EL34/6CA7High Performance Audio PowerPentodeThe Svetlana™ EL34 is a glass envelope power pentode having a plate dissipation ratingof 25 Watts with convection cooling. It is intended for audio frequency power
amplification service in either pentode, ultralinear or triode connection and single orpush-pull/parallel applications. The Svetlana EL34 has an indirectly-heated oxide cathode,which may be DC operated for the absolute best hum/noise performance.
The Svetlana EL34 plate is made from a laminated material that improves heat transfer andhas superior performance under overload conditions which are often seen with guitar amplifiers. Close manufacturing specification tolerances and improved processing provide enhanced
reliability and superior sonic performance. The high sensitivity of a pair or quad of Svetlana
EL34's is an economical method to achieve high quality sound with a minimum of driving
stage components.
The Svetlana EL34 is manufactured with the original Mullard design in the Svetlana factoryin St. Petersburg, Russia, and is designed to be a direct replacement for any EL34/6CA7 orequivalent. The Svetlana EL34 gives electrical and audio performance very similar to that of
the original Mullard EL34.

Svetlana Outline drawing

Characteristics

ElectricalHeater:
Min.
Nom.
Max.
Voltage (AC or DC)
5.7
6.3
6.9
V
Current
1.6
A
Cathode:Oxide-coated, unipotential
Cathode-to-heater potential, max.
100
V
Direct interelectrode capacitances, max.***
Grid no.1 to cathode and grid no.3, grid no.2,
base sleeve and heater<16 pF
Plate to cathode and grid no.3, grid no.2,
base sleeve and heater<0.6 pF
Grid no.1 to plate<1.1 pF
Mechanical
Operating PositionAnyBase
JEDEC #8ET, octal, 8-pin
Maximum dimensions:
Height
113 mm (4.45 in.)Seated height
98 mm (3.86 in.)
Diameter
32 mm (1.26 in.)
CoolingConvection
Approximate net weight
60 g (2.1 oz.)***Without external shielding, nominal values
AF Power Amplifier
Maximum ratings
DC plate voltage
Grid no.2 DC (screen) voltage
Grid no.1 (control) voltage
DC cathode current
Plate dissipation
Grid no.2 DC (screen) dissipation
Bulb temperature (surface hottest point)

800
500-100150258250˚

32mm

98mm

113mm

VVVmAWWC

Bottom ViewOctal Base Connections
G24PHHeadquarters:
8200 South Memorial Parkway
Huntsville, AL 35802
USAPhone:
205 882 1344
Fax:
205 880 8077

Svetlana
ELECTRON DEVICES

www.svetlana.com

Marketing & Engineering:3000 Alpine Road
Portola Valley, CA 94028
USAPhone:
415 233 0429
Fax:
415 233 0439
4/97

G15NC

372H
1G38K

Svetlana EL34/6CA7
High Performance Audio
Power Pentode

Svetlana
ELECTRON DEVICES

Typical Operation
AF Power Amplifier, Class A1 (single tube)
Plate Voltage
Grid 2 Screen Voltage
Grid 1 Control Voltage*
Peak AF Grid 1 Control VoltageZero Signal Plate Current
Maximum Signal Plate Current
Zero Signal Grid 2 Screen Current (avg)Transconductance (nominal)
Load Resistance
Output Power at 5% distortion* Approximate Value (set to zero signal plate current)

250
V
250
V-14
V
14V
100 mA
105 mA
15 mA
11,000µS
2000 Ohms
10W

Typical Performance
EL34 Curves

Svetlana EL34400

Svetlana EL34400

400
Plate Voltage = 250

Screen Voltage = 250

300

Screen Voltage

350

Grid Voltage

350

250

250

200

150

100

PLATE CURRENT (MILLIAMPS)

PLATE CURRENT (MILLIAMPS)

0300

300

250
-5200-1015010050500-6000-20-30-50-40-30-20-100100200300400500

PLATE VOLTAGE (VOLTS)

GRID VOLTAGE (VOLTS)

www.svetlana.com

600