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Voltage Tetrode ·Tetrode

6CY5

Sharp-cutoff tetrode for VHF television-tuner RF amplification. Its high output resistance and controlled cutoff suit sensitive tuner front ends.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
1
Base
7EW
Socket code
B7G
Base pins
7
Nominal heater
6.3 V / 200 mA

Description

Miniature sharp-cutoff tetrode intended as an RF amplifier in VHF television tuners, with low grid-to-plate capacitance and high transconductance.

Socket description

Miniature 7-contact

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base
7EW
Socket code
B7G
Base pins
7
Nominal heater voltage
6.3 V
Nominal heater current
200 mA
Parallel heater voltage
-
Parallel heater current
-
Series capable
No

7EW - Terminal pinout

Electrical assignments shared by every tube using this base designation.

TerminalSectionConnectionEvidence
PIN1G1AG1 — Control Grid

EIA transcription; manufacturer confirmation pending

Unverified

EIA Base Connections, printed page 129, 7EW

PIN2ISAIS — Internal ScreenGroup 7EW2

EIA transcription; manufacturer confirmation pending

Unverified

EIA Base Connections, printed page 129, 7EW

PIN2KAK — CathodeGroup 7EW2

EIA transcription; manufacturer confirmation pending

Unverified

EIA Base Connections, printed page 129, 7EW

PIN3H—H — Heater

EIA transcription; manufacturer confirmation pending

Unverified

EIA Base Connections, printed page 129, 7EW

PIN4H—H — Heater

EIA transcription; manufacturer confirmation pending

Unverified

EIA Base Connections, printed page 129, 7EW

PIN5PAP — Plate (Anode)

EIA transcription; manufacturer confirmation pending

Unverified

EIA Base Connections, printed page 129, 7EW

PIN6G2AG2 — Screen Grid

EIA transcription; manufacturer confirmation pending

Unverified

EIA Base Connections, printed page 129, 7EW

PIN7ISAIS — Internal ScreenGroup 7EW7

EIA transcription; manufacturer confirmation pending

Unverified

EIA Base Connections, printed page 129, 7EW

PIN7KAK — CathodeGroup 7EW7

EIA transcription; manufacturer confirmation pending

Unverified

EIA Base Connections, printed page 129, 7EW

Section ratings

1 physical section, each with unique specifications.

Section 1

Tetrode

X-ray radiationInterelectrode capacitances
Plate resistance
100000 Ω
Transconductance
0.008 S
Max plate voltage
180 V
Max screen voltage
180 V
Max plate dissipation
2 W
Max screen dissipation
0.5 W
Max cathode current
20 mA

Published maximum ratings and characteristic constants promoted; identical twin sections compressed when applicable.

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

Tetrode

Other

  • Plate Voltage

    125 V

    Published operating/characteristic table

  • Screen Voltage

    80 V

    Published operating/characteristic table

Characteristic

  • Plate Current

    10 mA

    Published operating/characteristic table

  • Screen Current

    1.5 mA

    Published operating/characteristic table

  • Transconductance

    8000 uS

    Published operating/characteristic table

  • Plate Resistance

    0.1 ohm

    Published operating/characteristic table

Data set 02

1965 Ericsson Longlife

Published operating points and test conditions from this source.

SECTION 1

Tetrode

Other

  • Plate voltage

    125 V

  • Screen-grid voltage

    80 V

  • Control-grid voltage

    -1 V

  • Plate current

    10 mA

  • Screen-grid current

    1.5 mA

  • Transconductance minimum

    6300 uS

  • Transconductance maximum

    10200 uS

  • Plate current maximum

    16 mA

  • Screen-grid current maximum

    2.5 mA

Characteristics

  • Transconductance

    8000 uS

  • Plate resistance

    0.1 MOhm

Data set 03

1965 Sylvania Electronic Tubes Vol3

Published operating points and test conditions from this source.

SECTION 1

Tetrode

Other

  • Plate voltage

    125 V

  • Screen-grid voltage

    80 V

  • Grid 1 voltage

    -1 V

  • Plate current

    10 mA

  • Screen-grid current

    1.4 mA

Characteristics

  • Plate resistance

    125000 Ohm

  • Transconductance

    8000 uS

  • Control-grid cutoff voltage

    -6 V

Capacitance

  • Grid-to-plate capacitance

    0.03 pF

    Shielded

  • Input capacitance

    4.4 pF

    Shielded

  • Output capacitance

    2.8 pF

    Shielded

Data set 04

1965 Westinghouse Data Book

Published operating points and test conditions from this source.

SECTION 1

Tetrode

Characteristics

  • Heater Voltage

    6.3 V

  • Heater Current

    200 mA

  • Transconductance

    8000 uS

    RepresentativePublishedPoint

  • Plate Resistance

    125000 ohm

    RepresentativePublishedPoint

Other

  • Maximum Plate Voltage

    180 V

  • Maximum Plate Dissipation

    2 W

  • Screen Supply Voltage

    180 V

  • Screen Dissipation

    0.5 W

  • Plate Voltage

    125 V

  • Screen Voltage

    80 V

  • Grid Voltage

    -1 V

  • Plate Current

    10 mA

  • Screen Current

    1.4 mA

Data set 05

1966 Tung Sol Electronic Tubes 2 of 4

Published operating points and test conditions from this source.

SECTION 1

Tetrode

Other

  • Plate voltage

    125 V

  • Screen voltage

    80 V

  • Control-grid voltage

    -1 V

Characteristic

  • Control-grid cutoff bias

    -6 V

  • Plate current

    10 mA

  • Screen current

    1.5 mA

Data set 06

1968 General Electric Co

Published operating points and test conditions from this source.

SECTION 1

Tetrode

Other

  • HeaterVoltageNominal

    6.3 V

  • HeaterCurrentNominal

    200 mA

  • Typical Plate Voltage

    125 V

    AverageCharacteristics

  • Typical Screen Voltage

    80 V

    AverageCharacteristics

Characteristic

  • Plate Resistance

    100000 Ohm

  • Transconductance

    8000 uS

Data set 07

196X LM Ericsson

Published operating points and test conditions from this source.

SECTION 1

Tetrode

Characteristics

  • Heater voltage

    6.3 V

  • Heater current

    200 mA

  • Transconductance

    8000 uS

  • Application

    CATV broadband RF amplifier

Other

  • Maximum plate voltage

    200 V

  • Maximum screen voltage

    200 V

  • Maximum plate dissipation

    22 W

Data set 08

1971 RCA HB3 Binder 3 of 7

Published operating points and test conditions from this source.

SECTION 1

Tetrode

Other

  • Heater voltage

    6.3 V

  • Heater current

    200 mA

  • Plate voltage

    125 V

    ClassA

  • Screen voltage

    80 V

    ClassA

  • Grid voltage

    -1 V

    ClassA

  • Plate current

    10 mA

    ClassA

  • Screen current

    1.4 mA

    ClassA

  • Maximum plate voltage

    180 V

  • Maximum screen voltage

    180 V

  • Maximum plate dissipation

    2 W

Characteristic

  • Plate resistance

    125000 ohm

    ClassA

  • Transconductance

    8000 uS

    ClassA

Capacitance

  • Grid-to-plate capacitance

    0.03 pF

  • Input capacitance

    4.4 pF

  • Output capacitance

    2.74 pF

Data set 09

1971 RCA HB3 Binder 4 of 7

Published operating points and test conditions from this source.

SECTION 1

Tetrode

Characteristics

  • Voltage (AC or DC) — published value 1

    6.3 V

    Published datasheet value; multiple values represent separate source-table limits or conditions.

  • Voltage (AC or DC) — published value 2

    10 V

    Published datasheet value; multiple values represent separate source-table limits or conditions.

  • Current

    200 mA

    Published datasheet value; multiple values represent separate source-table limits or conditions.

  • Grid No.l to plate — published value 1

    0

    Published datasheet value; multiple values represent separate source-table limits or conditions.

  • Grid No.l to plate — published value 2

    3

    Published datasheet value; multiple values represent separate source-table limits or conditions.

  • Grid No.l to cathode 8 internal shield,

    8

    Published datasheet value; multiple values represent separate source-table limits or conditions.

  • grid No.2, and heater

    4.5

    Published datasheet value; multiple values represent separate source-table limits or conditions.

  • grid No.2, and heater

    3

    Published datasheet value; multiple values represent separate source-table limits or conditions.

  • Plate Voltage

    125 V

    Published datasheet value; multiple values represent separate source-table limits or conditions.

  • Grid-No.2 Voltage

    80 V

    Published datasheet value; multiple values represent separate source-table limits or conditions.

  • Grid-No.l Voltage

    -1 V

    Published datasheet value; multiple values represent separate source-table limits or conditions.

  • Plate Resistance (Approx )

    0.1 Mohm

    Published datasheet value; multiple values represent separate source-table limits or conditions.

  • Transconductance

    8000

    Published datasheet value; multiple values represent separate source-table limits or conditions.

  • Plate Current

    10 mA

    Published datasheet value; multiple values represent separate source-table limits or conditions.

  • Grid-No.2 Current

    1.5 mA

    Published datasheet value; multiple values represent separate source-table limits or conditions.

  • plate µa = 20 — published value 1

    20 V

    Published datasheet value; multiple values represent separate source-table limits or conditions.

Data set 10

1975 RCA RC30

Published operating points and test conditions from this source.

SECTION 1

Tetrode

Capacitance

  • Grid No.1-to-plate capacitance

    0.03 pF

  • Grid No.1-to-cathode/heater/screen/shield capacitance

    4.5 pF

  • Plate-to-cathode/heater/screen/shield capacitance

    3 pF

Other

  • Plate voltage

    125 V

    ClassA

  • Screen-grid voltage

    80 V

    ClassA

  • Transconductance

    8000 uS

    ClassA

  • Plate current

    10 mA

    ClassA

  • Screen-grid current

    1.5 mA

    ClassA

  • Cathode current

    20 mA

    MaximumRating