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Power - Pentode (NOT beam) ·Pentode-Triode

ECL86

Combination valve incorporating a power-output pentode with diode or triode sections for audio-frequency amplification, detection, or driver service.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 2
Base: 9LZ
Socket code: B9A
Base pins: 9
Nominal heater: 6.3 V / 660 mA

Description

Triode-pentode for high-quality audio voltage amplification and output-power stages.

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: 9LZ
Socket code: B9A
Base pins: 9
Nominal heater voltage: 6.3 V
Nominal heater current: 660 mA
Parallel heater voltage: -
Parallel heater current: -
Series capable: No

9LZ - 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

Plate resistance: 50000 Ω
Transconductance: 0.0016 S
Amplification factor: 100
Max plate voltage: 300 V
Max plate dissipation: 0.5 W
Max cathode current: 4 mA

Published electrical section from supplied RCA data sheet.

Section 2

Pentode

X-ray radiationInterelectrode capacitances

Plate resistance: 48000 Ω
Transconductance: 0.01 S
Amplification factor: 21
Max plate voltage: 300 V
Max screen voltage: 300 V
Max plate dissipation: 9 W
Max screen dissipation: 1.8 W
Max cathode current: 55 mA

Published electrical section from supplied RCA data sheet.

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

1963 Amperex Condensed

Published operating points and test conditions from this source.

SECTION 1

Triode

Characteristic

Heater voltage
6.3 V
Published heater rating
Heater current
700 mA
Published heater rating
Triode amplification factor
100
TriodeSection AFAmplifier

Other

Triode plate voltage
250 V
TriodeSection AFAmplifier
Triode control-grid bias
-1.7 V
TriodeSection AFAmplifier
Triode plate current
1.2 mA
TriodeSection AFAmplifier

SECTION 2

Pentode

Other

Pentode plate voltage
250 V
PentodeSection AFAmplifier
Pentode screen voltage
250 V
PentodeSection AFAmplifier
Pentode control-grid bias
-7 V
PentodeSection AFAmplifier
Pentode plate current
36 mA
PentodeSection AFAmplifier
Pentode screen current
5.5 mA
PentodeSection AFAmplifier

Characteristic

Pentode plate resistance
45000 ohm
PentodeSection AFAmplifier
Pentode transconductance
10000 µS
PentodeSection AFAmplifier

Data set 02

1963 Philips Electron Tubes Handbook V1a

Published operating points and test conditions from this source.

SECTION 1

Triode

Characteristic

Heater voltage
6.3 V
Published heater rating
Heater current
700 mA
Published heater rating

Other

Triode plate voltage
250 V
TriodeSection
Triode grid bias
-1.9 V
TriodeSection
Triode plate current
1.2 mA
TriodeSection
Pentode plate voltage
250 V
PentodeSection
Pentode screen voltage
250 V
PentodeSection
Pentode grid bias
-7 V
PentodeSection

Data set 03

1967 Mullard Receiving and Amplifying Valves

Published operating points and test conditions from this source.

SECTION 1

Triode

Other

c ap - gt <
0.006 pF
Published in approved ECL86 target datasheet entry; Section1
c at - gl <
0.2 pF
Published in approved ECL86 target datasheet entry; Section1
( cgt - gl <
0.02 pF
Published in approved ECL86 target datasheet entry; Section1
c at - ap <
0.15 pF
Published in approved ECL86 target datasheet entry; Section1
cin
10 pF
Published in approved ECL86 target datasheet entry; Section1
ca - gl <
0.4 pF
Published in approved ECL86 target datasheet entry; Section1
c in 2
3 pF
Published in approved ECL86 target datasheet entry; Section1
cout 2
5 pF
Published in approved ECL86 target datasheet entry; Section1
ca - g 1
4 pF
Published in approved ECL86 target datasheet entry; Section1
cg - h < 6
0 pF
Published in approved ECL86 target datasheet entry; Section1
gm
10 mA
Published in approved ECL86 target datasheet entry; Section1
gm 1
6 mA
Published in approved ECL86 target datasheet entry; Section1
Yin (r .m. s .) (Po ut =
50 mW
Published in approved ECL86 target datasheet entry; Section1
Yin (r .m .s .) (P out =
50 mW
Published in approved ECL86 target datasheet entry; Section1
Yin (r .m .s .) (P out = 50 mW) 480
520 mV
Published in approved ECL86 target datasheet entry; Section1

SECTION 2

Pentode

Other

c ap - gt <
0.006 pF
Published in approved ECL86 target datasheet entry; Section2
c at - gl <
0.2 pF
Published in approved ECL86 target datasheet entry; Section2
( cgt - gl <
0.02 pF
Published in approved ECL86 target datasheet entry; Section2
c at - ap <
0.15 pF
Published in approved ECL86 target datasheet entry; Section2
cin
10 pF
Published in approved ECL86 target datasheet entry; Section2
ca - gl <
0.4 pF
Published in approved ECL86 target datasheet entry; Section2
c in 2
3 pF
Published in approved ECL86 target datasheet entry; Section2
cout 2
5 pF
Published in approved ECL86 target datasheet entry; Section2
ca - g 1
4 pF
Published in approved ECL86 target datasheet entry; Section2
cg - h < 6
0 pF
Published in approved ECL86 target datasheet entry; Section2
gm
10 mA
Published in approved ECL86 target datasheet entry; Section2
gm 1
6 mA
Published in approved ECL86 target datasheet entry; Section2
Yin (r .m. s .) (Po ut =
50 mW
Published in approved ECL86 target datasheet entry; Section2
Yin (r .m .s .) (P out =
50 mW
Published in approved ECL86 target datasheet entry; Section2
Yin (r .m .s .) (P out = 50 mW) 480
520 mV
Published in approved ECL86 target datasheet entry; Section2

Data set 04

1968 Mazda Belvu

Published operating points and test conditions from this source.

SECTION 1

Triode

Other

HeaterVoltageNominal
6.3 V
Nominal
HeaterCurrentNominal
700 mA
Nominal
Maximum Plate Voltage
300 V
Maximum Plate Dissipation
1 W
Maximum Cathode Current
12 mA

Characteristic

Transconductance
1600 µS
Typical
Amplification Factor
100
Typical
Plate Resistance
50000 ohm
Typical

SECTION 2

Pentode

Other

HeaterVoltageNominal
6.3 V
Nominal
HeaterCurrentNominal
700 mA
Nominal
Maximum Plate Voltage
550 V
Maximum Screen Voltage
300 V
Maximum Plate Dissipation
9 W
Maximum Screen Dissipation
2.5 W
Maximum Cathode Current
65 mA

Characteristic

Transconductance
10000 µS
Typical
Amplification Factor
10
Typical
Plate Resistance
20000 ohm
Typical

Data set 05

1971 RCA HB3 Binder 5 of 7

Published operating points and test conditions from this source.

SECTION 1

Triode

Other

Heater voltage nominal
6.3 V
Heater current nominal
660 mA

Characteristics

Voltage (AC or DC)
6.3 V
Published source row
Current at heater volts =
6.3 V
Published table column
Peak heater—cathode voltage
100 V
Published source row

SECTION 2

Pentode

Other

Heater voltage nominal
6.3 V
Heater current nominal
660 mA
Plate Supply Voltage
550 V
Published source row
Plate Supply Voltage (value 2)
550 V
Published source row
Plate Voltage
300 V
Published source row
Plate Voltage (value 2)
300 V
Published source row
Grid-No
2 V
Published source row
Grid-No (value 2)
550 V
Published source row
Grid-No
2 V
Published source row
Grid-No (value 2)
300 V
Published source row
Average Cathode Current
4 mA
Published source row
Average Cathode Current (value 2)
55 mA
Published source row
Grid-No
2 W
Published source row
Grid-No (value 2)
1.8 W
Published source row
Plate Dissipation
0.5 W
Published source row
Plate Dissipation (value 2)
9 W
Published source row
Grid-No.l Voltage at grid No
1 V
Published source row
Grid-No.l Voltage at grid No (value 2)
0.3 V
Published source row
Grid-No.l Voltage at grid No (value 3)
-1.3 V
Published source row
Grid-No
1
Published source row

Characteristics

Voltage (AC or DC)
6.3 V
Published source row
Current at heater volts =
0.66 V
Published table column
Peak heater—cathode voltage
100 V
Published source row
Plate Voltage
250 V
Published source row
Plate Voltage (value 2)
250 V
Published source row
Grid No
2 V
Published source row
Grid No (value 2)
250 V
Published source row
Grid No
1 V
Published source row
Grid No (value 2)
-1.9 V
Published source row
Grid No (value 3)
-7 V
Published source row
Plate Resistance (Approx.)
48000 ohm
Published source row
Transconductance
1600 µS
Published source row
Transconductance (value 2)
10000 µS
Published source row
Plate Current
1.2 mA
Published source row
Plate Current (value 2)
36 mA
Published source row
Grid-No
2 mA
Published source row
Grid-No (value 2)
6 mA
Published source row

Data set 06

1972 Philips Receiving Tubes

Published operating points and test conditions from this source.

SECTION 1

Triode

Other

HeaterVoltageNominal
6.3 V
Nominal
HeaterCurrentNominal
660 mA
Nominal
Maximum Plate Voltage
300 V
Maximum Plate Dissipation
0.5 W
Maximum Cathode Current
12 mA

Characteristic

Transconductance
1600 µS
Typical
Amplification Factor
100
Typical
Plate Resistance
50000 ohm
Typical

SECTION 2

Pentode

Other

HeaterVoltageNominal
6.3 V
Nominal
HeaterCurrentNominal
660 mA
Nominal
Maximum Plate Voltage
550 V
Maximum Screen Voltage
300 V
Maximum Plate Dissipation
9 W
Maximum Screen Dissipation
2.5 W
Maximum Cathode Current
65 mA

Characteristic

Transconductance
10000 µS
Typical
Amplification Factor
10
Typical
Plate Resistance
20000 ohm
Typical

Data set 07

1973 Mazda Valves Binder 2

Published operating points and test conditions from this source.

SECTION 1

Triode

Other

Heater Voltage Vh
63 V
Heater Current Ih
660 mA
Maximum Anode Dissipation pa(max) 05
90 W
Maximum Screen Grid Dissipation Pga(max) —
18 W
Maximum Anode Supply Voltage (la = 0) Va(b)max 550
550 V
Maximum Anode Voltage Va(max) 300
300 V
Maximum Screen Grid Supply Voltage (I$ 2 = 0) Vga(b)max
550 V
Maximum Screen Grid Voltage Vg2(max)
300 V
Maximum Heater to Cathode Voltage Vh-k(max) 100
100 V
Maximum Cathode Current lk(max) 4.0
55 mA
Grid 1 to Heater Cg1-h <
0.24 pF

Characteristic

For speech and music —
3 W
Pentode input cin(p)
10 pF
Grid 1 to Anode Pentode Cgs-ap <
0.4 pF
Triode Input Cin(t)
2.3 pF
Triode Output Cout(t)
2.5 pF
Grid Triode to Anode Triode Cgt-at
1.4 pF

Data set 08

1975 RCA RC30

Published operating points and test conditions from this source.

SECTION 1

Triode

Other

Plate Supply Voltage 550
550 V
Published in approved ECL86 target datasheet entry; Section1
Plate Voltage 300
300 V
Published in approved ECL86 target datasheet entry; Section1
Grid-No.2 (Screen-Grid) Supply Voltage
550 V
Published in approved ECL86 target datasheet entry; Section1
Grid-No.2 Voltage
300 V
Published in approved ECL86 target datasheet entry; Section1
Cathode Current 4
55 mA
Published in approved ECL86 target datasheet entry; Section1
Plate Dissipation 0.5
9 W
Published in approved ECL86 target datasheet entry; Section1
Grid-No.2 Input
1.5 W
Published in approved ECL86 target datasheet entry; Section1
Plate Voltage 250
250 V
Published in approved ECL86 target datasheet entry; Section1
Grid-No. 1-Circuit Resistance, for fixed-bias operation 1
0.5 MΩ
Published in approved ECL86 target datasheet entry; Section1
Heater Voltage (ac/dc)
6.3 V
Published in approved ECL86 target datasheet entry; Section1
Heater Current
400 mA
Published in approved ECL86 target datasheet entry; Section1

Characteristic

Grid-No.l Voltage
-1.9 V
Published in approved ECL86 target datasheet entry; Section1
Plate Current 1.2
36 mA
Published in approved ECL86 target datasheet entry; Section1

Capacitance

andInternal Shield
2.3 pF
Published in approved ECL86 target datasheet entry; Section1
Grid No.l to Plate
0.005 pF
Published in approved ECL86 target datasheet entry; Section1
Internal Shield
3.3 pF
Published in approved ECL86 target datasheet entry; Section1
Grid No.l to Grid No.2
1.6 pF
Published in approved ECL86 target datasheet entry; Section1

SECTION 2

Pentode

Other

Plate Supply Voltage 550
550 V
Published in approved ECL86 target datasheet entry; Section2
Plate Voltage 300
300 V
Published in approved ECL86 target datasheet entry; Section2
Grid-No.2 (Screen-Grid) Supply Voltage
550 V
Published in approved ECL86 target datasheet entry; Section2
Grid-No.2 Voltage
300 V
Published in approved ECL86 target datasheet entry; Section2
Cathode Current 4
55 mA
Published in approved ECL86 target datasheet entry; Section2
Plate Dissipation 0.5
9 W
Published in approved ECL86 target datasheet entry; Section2
Grid-No.2 Input
1.5 W
Published in approved ECL86 target datasheet entry; Section2
Plate Voltage 250
250 V
Published in approved ECL86 target datasheet entry; Section2
Grid-No. 1-Circuit Resistance, for fixed-bias operation 1
0.5 MΩ
Published in approved ECL86 target datasheet entry; Section2
Heater Voltage (ac/dc)
6.3 V
Published in approved ECL86 target datasheet entry; Section2
Heater Current
400 mA
Published in approved ECL86 target datasheet entry; Section2

Characteristic

Grid-No.l Voltage
-1.9 V
Published in approved ECL86 target datasheet entry; Section2
Plate Current 1.2
36 mA
Published in approved ECL86 target datasheet entry; Section2

Capacitance

andInternal Shield
2.3 pF
Published in approved ECL86 target datasheet entry; Section2
Grid No.l to Plate
0.005 pF
Published in approved ECL86 target datasheet entry; Section2
Internal Shield
3.3 pF
Published in approved ECL86 target datasheet entry; Section2
Grid No.l to Grid No.2
1.6 pF
Published in approved ECL86 target datasheet entry; Section2

Data set 09

1999 Philips E-Z

Published operating points and test conditions from this source.

SECTION 1

Triode

Characteristic

Anode current I
1.2 mA
Published datasheet value
Transconductance S
1.6 mA/v
Published datasheet value
Anode current Ia
36 mA
Published datasheet value
Transconductance S
10 mA/V
Published datasheet value
Output power Wy
4 W
Published datasheet value
Heater voltage V¢
6.3 V
Published datasheet value
Heater current I¢
660 mA
Published datasheet value

Capacitance

Anode to all except grid Ca(g)
2.5 pF
Published datasheet value
Grid to all except anode Cg(a)
2.3 pF
Published datasheet value
Anode to grid Cag
1.4 pF
Published datasheet value
Grid to heater Cgt max
0.006 pF
Published datasheet value
Grid No.!l to all except anode Cgl(a)
10 pF
Published datasheet value
Anode to grid No.1 Cagl max
0.4 pF
Published datasheet value
Grid No.1 to heater Cglf max
0.24 pF
Published datasheet value
Anode triode to grid No.l pentode CaTgIP max
0.2 pF
Published datasheet value
Grid triode to grid No.!l pentode CnglP max
0.02 pF
Published datasheet value