SVETLANA TECHNICAL DATA
SV6550C
he Svetlana
™
SV6550C is a glass envelope beam power pentode. It is intended for
ultra linear audio frequency power amplification service.
Close manufacturing
specification tolerances and improved processing provide improved reliability and
superior sonic performance. The new SV6550C features: increased peak cathode
emission from new cathode materials; stable operation from extended processing and
aging; gold-plated grid; new tri-plate anode; single-piece beam forming electrode;
precise grid/screen alignment; improved vacuum processing; and comprehensive static
and audio amplifier testing before and after aging.
The Svetlana SV6550C is manufactured in the Svetlana factory in St. Petersburg, Russia,
and is designed to be a direct replacement for any 6550.
T
High Performance Audio Beam
Power Pentode
Characteristics
Electrical
Heater:
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.
-300*/200**
V
Direct interelectrode capacitances, max.***
Grid no.1 to cathode and grid no.3, grid no.2,
base sleeve and heater
18.5 pF
Plate to cathode and grid no.3, grid no.2,
base sleeve and heater
12.5 pF
Grid no.1 to plate (max)
1.1 pF
Svetlana Outline drawing
2.05" max
4.72" max
4.17" max
Mechanical
Operating Position
Base
Maximum dimensions:
Height
Seated height
Diameter
Cooling
Envelope Temperature (max)
Approximate net weight
Any
Large wafer octal 8-pin with metal sleeve
116 mm (4.57 in.)
106 mm (4.173 in.)
46 mm (1.81 in.)
Convection cooled
250˚C
100 g (3.5 oz.)
680
400
-300
175
35
6
V
V
V
mA
W
W
1.77" max
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 (screen) dissipation
*Max with heater negative to cathode
**Max with heater positive to cathode
***Without external shielding
Bottom View
G2
4
P
3
2
1
External shield
around base
8
C,BP
7
H
G1
5
H
Svetlana
Svetlana SV6550C
High Performance Audio
Beam Power Pentode
Typical Operation Class A
1
(single tube)
DC plate voltage
Grid no.2 DC (screen) voltage
Grid no.1 DC (control) voltage
Peak AF grid no.1 (control) voltage
Zero-signal plate current
Max signal plate current
Zero signal grid no.2 (screen) current
Max signal grid no.2 (screen) current
Transconductance (nominal)
Load resistance
Signal output at 5% distortion
400
225
-22
22
87
105
4
18
9500
3000
12
V
V
V
V
mA
mA
mAdc
mA
µ
S
ohms
W
Svetlana
Svetlana SV6550C
Typical Characteristics
Screen Voltage = 250V
Svetlana SV6550C
Typical Characteristics
Screen Voltage = 250V
200
screen current
400
plate current
0
175
350
SCREEN CURRENT (mA)
ANODE CURRENT (mA)
150
300
-5
125
250
-10
100
200
-15
75
150
50
0
100
-20
25
-5
-10
-15
-25
50
-20
-25
0
0
100
200
300
400
0
600
500
0
100
200
300
400
500
600
PLATE VOLTAGE (Ep, V)
PLATE VOLTAGE (Ep, V)
www.svetlana-tubes.com
Microcontroller MCU
京公网安备 11010802033920号
EEWORLD
