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Voltage Radio Detector Converter ·Pentode-Triode

6EU8

Triode oscillator plus sharp-cutoff pentode mixer for television frequency-converter service, with controlled heater-cathode warm-up.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 2
Base: -
Socket code: B9A
Base pins: 9
Nominal heater: 6.3 V / 450 mA

Description

The 6EU8 combines a triode oscillator section with a sharp-cutoff pentode mixer section for television receivers and includes controlled heater/cathode warm-up behavior.

Socket description

Small-button Noval 9-contact

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base: -
Socket code: B9A
Base pins: 9
Nominal heater voltage: 6.3 V
Nominal heater current: 450 mA
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, each with unique specifications.

Section 1

Pentode

X-ray radiationInterelectrode capacitances

Plate resistance: 80000 Ω
Transconductance: 0.0064 S
Max plate voltage: 330 V
Max screen voltage: 330 V
Max plate dissipation: 3.1 W
Max screen dissipation: 0.55 W
Rectifier max heater-cathode voltage: 200 V

Pentode section.

Section 2

Triode

X-ray radiationInterelectrode capacitances

Plate resistance: 5000 Ω
Transconductance: 0.0085 S
Amplification factor: 40
Max plate voltage: 330 V
Max plate dissipation: 3 W
Rectifier max heater-cathode voltage: 200 V

Triode section.

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

Pentode

Other

Plate_voltage
125 V
ClassA
Screen_voltage
125 V
ClassA
Grid_1_voltage
-1 V
ClassA

Characteristic

Plate_current
12 mA
ClassA
Screen_current
4 mA
ClassA

SECTION 2

Triode

Other

Plate_voltage
150 V
ClassA
Cathode_resistor
56 ohm
ClassA
Heater_warmup_time
11 s
ClassA

Characteristic

Plate_current
18 mA
ClassA

Data set 02

1968 General Electric Co

Published operating points and test conditions from this source.

SECTION 1

Pentode

Characteristic

Plate Voltage
125 V
PentodeSection
Screen Voltage
125 V
PentodeSection
Plate Current
12 mA
PentodeSection

SECTION 2

Triode

Characteristic

Plate Voltage
150 V
TriodeSection
Plate Current
18 mA
TriodeSection

Data set 03

1971 RCA HB3 Binder 4 of 7

Published operating points and test conditions from this source.

SECTION 1

Pentode

Other

Plate voltage
100 V
ClassA
Maximum plate voltage
330 V
Maximum screen-grid voltage
330 V

Characteristics

Pin 1 - Pentode Plate — published value 1
1
Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.
Pin 1 - Pentode Plate — published value 2
7
Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.
Grid
8
Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.
Pin 6 -Triode Cathode 0~% — published value 1
6
Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.
Pin 6 -Triode Cathode 0~% — published value 2
0
Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.
Pin 6 -Triode Cathode 0~% — published value 3
9
Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.

SECTION 2

Triode

Other

Plate voltage
100 V
ClassA
Maximum plate voltage
330 V
Grid No.l to plate — published value 1
0.02 mA
Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.
Grid No.l to plate — published value 2
0.1 mA
Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.
PLATE VOLTAGE — published value 1
33 V
Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.
PLATE VOLTAGE — published value 2
330 V
Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.
SUPPLY VOLTAGE
330 V
Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.
Positive-bias value — published value 1
0 V
Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.
Positive-bias value — published value 2
0 V
Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.
PLATE DISSIPATION — published value 1
3 mA
Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.
PLATE DISSIPATION — published value 2
3.1 mA
Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.
respect to cathode — published value 1
200 V
Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.
respect to cathode — published value 2
200 V
Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.
respect to cathode — published value 1
200 V
Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.
respect to cathode — published value 2
200 V
Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.
GriQ-No.l~ircuit Resistance — published value 1
0.1 mA
Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.
GriQ-No.l~ircuit Resistance — published value 2
0.1 mA
Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.

Characteristics

Amplification factor
17
ClassA
Voltage (AC or DC)
6.3 V
Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.
Current — published value 1
0 mA
Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.
Current — published value 2
45 A
Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.
Current — published value 3
6 A
Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.
Grid to plate — published value 1
1
Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.
Grid to plate — published value 2
7
Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.
Grid to plate — published value 3
1.7
Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.
Grid to cathode and heater — published value 1
3
Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.
Grid to cathode and heater — published value 2
3.2
Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.
Plate to cathode and heater — published value 1
1.6
Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.
Plate to cathode and heater — published value 2
1.1
Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.
grid No.2, and heater — published value 1
5
Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.
grid No.2, and heater — published value 2
5
Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.
No.2, and heater — published value 1
26
Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.
No.2, and heater — published value 2
3.4
Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.
Heater to cathode (Each unit) — published value 1
3.6
EachUnit
Heater to cathode (Each unit) — published value 2
3.6
EachUnit
Grid-No.2 Supply Voltage
125 V
Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.
Grid-No.1 Voltage
-1 V
Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.
Cathode Resistor
56 ohm
Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.
Plate Resistance (Approx ) — published value 1
5000 ohm
Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.
Plate Resistance (Approx ) — published value 2
80000 ohm
Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.
Transconductance — published value 1
8500
Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.
Transconductance — published value 2
6400
Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.
Grid-No.2 Current
4 mA
Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.
for plate µa = 10 — published value 1
10 V
Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.
for plate µa = 10 — published value 2
-12 V
Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.
for plate µa = 10 — published value 3
-9 V
Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.
Cathode Warm-Up Timec
35
Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.
Pin 2 -Triode
2
Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.
Pin 4 -Heater
4
Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.
Pin 5 -Heater — published value 1
5
Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.
Pin 5 -Heater — published value 2
1
Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.
between 165 and 330 volts — published value 1
165 V
Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.
between 165 and 330 volts — published value 2
330 V
Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.
the LuDe is operated from a cold start with do plate volts
100 V
Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.