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EL34/6Ca7
SVETLANA TECHNICAL DATA
EL34/6CA7
High Performance Audio Power
Pentode
he Svetlana ™ EL34 is a glass envelope power pentode having a plate dissipation rating
of 25 Watts with convection cooling. It is intended for audio frequency power
amplification service in either pentode, ultralinear or triode connection and single or
push-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 and
has superior performance under overload conditions which are often seen with guitar amplifi-
ers. 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 factory
in St. Petersburg, Russia, and is designed to be a direct replacement for any EL34/6CA7 or
equivalent. The Svetlana EL34 gives electrical and audio performance very similar to that of
the original Mullard EL34.
T
Characteristics
Svetlana Outline drawing
Electrical
Heater:
Min.
Nom.
Max.
32mm
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
98mm
Grid no.1 to plate
<1.1 pF
Mechanical
Operating Position
Any
Base
JEDEC #8ET, octal, 8-pin
113mm
Maximum dimensions:
Height
113 mm (4.45 in.)
Seated height
98 mm (3.86 in.)
Diameter
32 mm (1.26 in.)
Cooling
Convection
Approximate net weight
60 g (2.1 oz.)
***Without external shielding, nominal values
AF Power Amplifier
Maximum ratings
DC plate voltage
800
V
Grid no.2 DC (screen) voltage
500
V
Bottom View
Octal Base Connections
Grid no.1 (control) voltage
-100
V
DC cathode current
150 mA
Plate dissipation
25
W
G2
G1
Grid no.2 DC (screen) dissipation
8
W
4
5
Bulb temperature (surface hottest point)
250˚
C
P
NC
3
H
2
7
H
Headquarters:
Marketing & Engineering:
1
8
G3
K
8200 South Memorial Parkway
Huntsville, AL 35802
USA
Phone:
3000 Alpine Road
Portola Valley, CA 94028
USA
Phone:
205 882 1344
415 233 0429
Fax:
205 880 8077
Fax:
415 233 0439
Svetlana
www.svetlana.com
4/97
ELECTRON DEVICES
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Svetlana EL34/6CA7
High Performance Audio
Power Pentode
Svetlana
ELECTRON DEVICES
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
m
Load Resistance
2000 Ohms
Output Power at 5% distortion
10
W
* Approximate Value (set to zero signal plate current)
Typical Performance
EL34 Curves
Svetlana EL34
400
Svetlana EL34
400
400
Plate Voltage = 250
Screen Voltage = 250
Screen Voltage
300
Grid Voltage
350
350
0
300
300
250
250
250
-5
200
200
150
150
-10
100
100
50
50
-20
-30
0
-60
-50
-40
-30
-20
-10
0
0
0
100
200
300
400
500
600
GRID VOLTAGE (VOLTS)
PLATE VOLTAGE (VOLTS)
www.svetlana.com
S
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