6DZ4

Miniature medium-mu triode designed as a UHF local oscillator in color and black-and-white television receivers covering approximately 470–890 MHz.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 1
Base: 7DK
Socket code: B7G
Base pins: 7
Nominal heater: 6.3 V / 225 mA

Description

Miniature medium-mu triode used as a local oscillator in UHF color and black-and-white television receivers covering approximately 470 to 890 MHz.

Socket description

Miniature 7-contact

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base: 7DK
Socket code: B7G
Base pins: 7
Nominal heater voltage: 6.3 V
Nominal heater current: 225 mA
Parallel heater voltage: -
Parallel heater current: -
Series capable: No

7DK - Terminal pinout

Electrical assignments shared by every tube using this base designation.

Terminal	Section	Connection	Evidence
PIN1P	A	P — Plate (Anode) Source-transcribed; independent manufacturer verification pending	Unverified EIA Base Connections, printed page 129, 7DK
PIN2G1	A	G1 — Control Grid Source-transcribed; independent manufacturer verification pending	Unverified EIA Base Connections, printed page 129, 7DK
PIN3H	—	H — Heater Source-transcribed; independent manufacturer verification pending	Unverified EIA Base Connections, printed page 129, 7DK
PIN4H	—	H — Heater Source-transcribed; independent manufacturer verification pending	Unverified EIA Base Connections, printed page 129, 7DK
PIN5K	A	K — Cathode Chart transcription; independent verification pending	Unverified EIA Base Connections, printed page 129, 7DK
PIN6G1	A	G1 — Control Grid Chart transcription; independent verification pending	Unverified EIA Base Connections, printed page 129, 7DK
PIN7P	A	P — Plate (Anode) Chart transcription; independent verification pending	Unverified EIA Base Connections, printed page 129, 7DK

Section ratings

1 physical section, each with unique specifications.

Section 1

Triode

X-ray radiationInterelectrode capacitances

Plate resistance: 2000 Ω
Transconductance: 0.0067 S
Amplification factor: 14
Max plate voltage: 135 V
Max plate dissipation: 2.3 W
Max cathode current: 20 mA

UHF oscillator triode.

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

1966 Tung Sol Electronic Tubes 2 of 4

Published operating points and test conditions from this source.

SECTION 1

Triode

Other

Plate supply voltage
80 V
ClassA1
Plate dropping resistor
2700 ohm
ClassA1
Plate current
15 mA
ClassA1
Negative grid voltage maximum
50 V
UHF-Oscillator
Oscillator test frequency
1000 MHz
JEDECStandardOscillatorNo400

Data set 02

1971 RCA HB3 Binder 4 of 7

Published operating points and test conditions from this source.

SECTION 1

Triode

Other

Heater voltage
6.3 V
Heater current
225 mA
Plate supply voltage
80 V
ClassA
Plate resistor
2700 ohm
ClassA
Plate current
15 mA
ClassA
Maximum plate voltage
135 V
UHFOscillator
Maximum grid current
2 mA
UHFOscillator
Maximum cathode current
20 mA
UHFOscillator
Plate dissipation
2.3 W
Operating frequency
1000 MHz
OscillatorTest

Characteristic

Amplification factor
14
ClassA
Plate resistance
2000 ohm
ClassA
Transconductance
6700 uS
ClassA

Capacitance

Grid-to-plate capacitance
1.8 pF

Data set 03

1975 RCA RC30

Published operating points and test conditions from this source.

SECTION 1

Triode

Capacitance

Grid to Plate
1.8 pF
Capacitance
Grid to Cathode and Heater
2.2 pF
Capacitance
Plate to Cathode and Heater
1.3 pF
Capacitance

Characteristic

Plate Supply Voltage
80 V
ClassA
Plate Resistor
2700 ohm
ClassA
Plate Current
15 mA
ClassA

Other

Oscillator Frequency
1000 MHz
Oscillator
Oscillator Plate Supply Voltage
135 V
Oscillator
Oscillator Plate Current
15.5 mA
Oscillator