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Power - Triode ·Triode-Triode

1635

High-mu twin triode intended for audio amplification and Class-B power-amplifier service, combining two triode units in one envelope for push-pull output operation.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
2
Base
8B
Socket code
IO
Base pins
8
Nominal heater
6.3 V / 600 mA

Description

The 1635 is an octal high-mu twin triode intended for audio amplifier applications. The source includes Class-B amplifier data and lists about 10.4 W output under the tabulated condition.

Socket description

International Octal

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base
8B
Socket code
IO
Base pins
8
Nominal heater voltage
6.3 V
Nominal heater current
600 mA
Parallel heater voltage
-
Parallel heater current
-
Series capable
No

8B - 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, each with unique specifications.

Section 1

Triode

X-ray radiationInterelectrode capacitances
Max plate voltage
300 V
Max plate dissipation
3 W

Published promoted values applied where semantically applicable; additional table values retained in section parameters.

Section 2

Triode

X-ray radiationInterelectrode capacitances
Max plate voltage
300 V
Max plate dissipation
3 W

Identical second physical section; duplicated from representative section per physical-section-row policy.

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

195X General Electric Essential Characteristics

Published operating points and test conditions from this source.

SECTION 1

Triode

Other

  • Plate voltage

    300 V

    ClassB PushPull TwoTubes

  • Control-grid voltage

    0 V

    ClassB PushPull TwoTubes

  • Load resistance plate-to-plate

    12000 Ω

    ClassB PushPull TwoTubes

  • Power output

    10.4 W

    ClassB PushPull TwoTubes

Data set 02

1960 RCA Industrial and Communications Types

Published operating points and test conditions from this source.

SECTION 1

Triode

Other

  • Plate voltage

    300 V

    ClassB

  • Power output

    10.4 W

    ClassB;TwoTubes

  • Plate-to-plate load for one-tube power output

    12000 Ohm

    ClassB

Data set 03

1971 RCA HB3 Binder 3 of 7

Published operating points and test conditions from this source.

SECTION 1

Triode

Characteristics

  • Voltage

    6.3 V

    Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.

  • Current

    0.6

    Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.

  • Pin 1 -No — published value 1

    1

    Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.

  • Pin 1 -No — published value 2

    5

    Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.

  • Pin 2 -Heater — published value 1

    2

    Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.

  • Pin 2 -Heater — published value 2

    6

    Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.

  • Pin 3 -Plate of

    3

    Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.

  • Unit No.2

    7

    Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.

  • Pin 4 -Grid of — published value 1

    4

    Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.

  • Pin 4 -Grid of — published value 2

    8

    Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.

  • DC Plate Voltage — published value 1

    300 V

    Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.

  • DC Plate Voltage — published value 2

    300 V

    Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.

  • DC Grid Voltage — published value 1

    0 V

    Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.

  • DC Grid Voltage — published value 2

    0 V

    Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.

  • Peak AF Grid-to — published value 1

    70 V

    Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.

  • Peak AF Grid-to — published value 2

    108 V

    Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.

  • Peak Grid Current (per unit) — published value 1

    38 mA

    Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.

  • Peak Grid Current (per unit) — published value 2

    39 mA

    Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.

  • Plate-Supply Impedance — published value 1

    0 ohm

    Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.

  • Plate-Supply Impedance — published value 2

    1000 ohm

    Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.

  • (plate-to-plate) — published value 1

    12000 ohm

    Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.

  • (plate-to-plate) — published value 2

    12000 ohm

    Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.

  • grid circuit is 500 Ohms, anA the leakage raactance O1 the Couppl ingg

    500 ohm

    Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.

Other

  • DC PLATE VOLTAGE

    300 V

    Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.

  • PEAK PLATE CURRENT (per plate)

    90 mA

    Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.

  • PLATE DISSIPATION (per plate)

    3 mA

    Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.

  • Heater negative with respect to cathode

    90 V

    Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.

  • Heater positive with respect to cathode

    90 V

    Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.

  • Max.-Signal DC Plate Current — published value 1

    54 mA

    Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.

  • Max.-Signal DC Plate Current — published value 2

    54 mA

    Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.

  • Max.-Signal Power Output — published value 1

    10.4 W

    Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.

  • Max.-Signal Power Output — published value 2

    10.4 W

    Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.