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Power - Triode ·Triode

6520

Low-mu high-perveance twin power triode designed for series-pass and DC regulator service. Closely balanced sections, very low plate resistance, and high current capability make it especially suitable for stabilized power supplies and control circuits.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
2
Base
-
Socket code
IO
Base pins
8
Nominal heater
6.3 V / 2.5 A

Description

Low-mu high-perveance twin power triode intended for series-pass and DC power-supply regulator service, with close section balance and high grid-to-plate insulation. Electrical ratings, characteristics, operating data, and special environmental information were extracted from the supplied source.

Socket description

International Octal

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base
-
Socket code
IO
Base pins
8
Nominal heater voltage
6.3 V
Nominal heater current
2.5 A
Parallel heater voltage
-
Parallel heater current
-
Series capable
No

Terminal pinout

Electrical assignments shared by every tube using this base designation.

No verified pinout is recorded for this base designation.

Section ratings

2 physical sections, with 1 unique section. The remaining sections have identical specifications.

Section 1

Triode

X-ray radiationInterelectrode capacitances
Plate resistance
280 Ω
Transconductance
0.007 S
Amplification factor
2
Max plate voltage
300 V
Max plate dissipation
14 W
Max cathode current
125 mA

Published ratings and characteristics promoted where applicable; additional table values retained in TUBE_SECTION_PARAMETER.

Source-dependent data

Operating conditions by source

Each block preserves the test conditions and published values from one reference. Values from different sources are intentionally kept separate.

Data set 01

1961 Tung Sol

Published operating points and test conditions from this source.

SECTION 1

Triode

Other

  • Heater voltage

    6.3 V

    Nominal

  • Heater current

    2.5 A

    Nominal

  • Plate voltage

    300 V

    Published operating table; OperatingPoint1

Characteristic

  • Plate current

    112 mA

    Published operating table; OperatingPoint1

  • Plate current

    58 mA

    Published operating table; OperatingPoint1

  • Plate current

    125 mA

    Published operating table; OperatingPoint1

  • Transconductance

    7000 uS

    Published operating table; OperatingPoint1

  • Plate resistance

    280 ohm

    Published operating table; OperatingPoint1

Data set 02

1966 Tung Sol Electronic Tubes 4 of 4

Published operating points and test conditions from this source.

SECTION 1

Triode

Characteristics

  • HEATER

    6.311 V

    Published datasheet table value; multiple values on a source row represent separate limits or operating conditions.

  • HEATER CURRENT

    2.5 A

    Published datasheet table value; multiple values on a source row represent separate limits or operating conditions.

  • PLATE- SUPPLY VOLTAGE

    135 V

    Published datasheet table value; multiple values on a source row represent separate limits or operating conditions.

  • AMPLIFICATION FACTOR

    2

    Published datasheet table value; multiple values on a source row represent separate limits or operating conditions.

  • PLATE RESISTANCE

    2 ohm

    Published datasheet table value; multiple values on a source row represent separate limits or operating conditions.

  • TRANSCONDUCTANCE

    7000 uS

    Published datasheet table value; multiple values on a source row represent separate limits or operating conditions.

  • PLATE CURRENT

    112 mA

    Published datasheet table value; multiple values on a source row represent separate limits or operating conditions.

  • ?LATE-SUPPLY

    1 V

    Published datasheet table value; multiple values on a source row represent separate limits or operating conditions.

  • FIXED GRID BIAS

    55 V

    Published datasheet table value; multiple values on a source row represent separate limits or operating conditions.

  • PLATE CURRENT

    58 mA

    Published datasheet table value; multiple values on a source row represent separate limits or operating conditions.

  • HEATER — published value 1

    6 V

    Published datasheet table value; multiple values on a source row represent separate limits or operating conditions.

  • HEATER — published value 2

    0 V

    Published datasheet table value; multiple values on a source row represent separate limits or operating conditions.

  • HEATER CURRENTC — published value 1

    2.26 A

    Published datasheet table value; multiple values on a source row represent separate limits or operating conditions.

  • HEATER CURRENTC — published value 2

    2.74 A

    Published datasheet table value; multiple values on a source row represent separate limits or operating conditions.

  • GRID —PLATE CAPACITANCE (EACH UNIT) — published value 1

    6.9 pF

    Published datasheet table value; multiple values on a source row represent separate limits or operating conditions.

  • GRID —PLATE CAPACITANCE (EACH UNIT) — published value 2

    9.9 pF

    Published datasheet table value; multiple values on a source row represent separate limits or operating conditions.

  • OUTPUT CAPACITANCE (EACH — published value 1

    1.7 pF

    Published datasheet table value; multiple values on a source row represent separate limits or operating conditions.

  • OUTPUT CAPACITANCE (EACH — published value 2

    2.7 pF

    Published datasheet table value; multiple values on a source row represent separate limits or operating conditions.

  • AMPLIFICATION FACTOR (EACH UNIT) — published value 1

    1.9

    Published datasheet table value; multiple values on a source row represent separate limits or operating conditions.

  • AMPLIFICATION FACTOR (EACH UNIT) — published value 2

    2.5

    Published datasheet table value; multiple values on a source row represent separate limits or operating conditions.

  • PLATE CURRENT (EACH UNI — published value 1

    100 mA

    Published datasheet table value; multiple values on a source row represent separate limits or operating conditions.

  • PLATE CURRENT (EACH UNI — published value 2

    125 mA

    Published datasheet table value; multiple values on a source row represent separate limits or operating conditions.

  • Plate resistance

    280 ohm

    Promoted section value from the supplied datasheet.

  • Transconductance

    0.007 A/V

    Promoted section value from the supplied datasheet.

  • Amplification factor

    2

    Promoted section value from the supplied datasheet.

Other

  • MAXIMUM PLATE

    300 V

    Published datasheet table value; multiple values on a source row represent separate limits or operating conditions.

  • MAXIMUM PLATE CURRENT

    125 mA

    Published datasheet table value; multiple values on a source row represent separate limits or operating conditions.

  • MAXIMUM PLATE DISSIPATION

    14 W

    Published datasheet table value; multiple values on a source row represent separate limits or operating conditions.

  • Maximum plate voltage

    300 V

    Promoted section value from the supplied datasheet.

  • Maximum plate dissipation

    14 W

    Promoted section value from the supplied datasheet.