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Power - Pentode (NOT beam) ·Pentode-Triode

UCL83

100 mA series-heater triode/pentode combining audio voltage amplification with power-output service.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 2
Base: B9A
Socket code: B9A
Base pins: 9
Nominal heater: 38 V / 100 mA

Description

Combined triode and output pentode with separate cathodes and a 100 mA heater for series-heater audio equipment.

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: B9A
Socket code: B9A
Base pins: 9
Nominal heater voltage: 38 V
Nominal heater current: 100 mA
Parallel heater voltage: -
Parallel heater current: -
Series capable: No

B9A - 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: 53000 Ω
Transconductance: 0.0055 S
Amplification factor: 10
Max plate voltage: 250 V
Max screen voltage: 250 V
Max plate dissipation: 5.4 W
Max screen dissipation: 1.2 W
Max cathode current: 45 mA

Promoted values are mapped from the supplied datasheet; additional published ratings, characteristics, capacitances and operating points are retained in TUBE_SECTION_PARAMETER.

Section 2

Triode

X-ray radiationInterelectrode capacitances

Plate resistance: 34000 Ω
Transconductance: 0.0025 S
Amplification factor: 85
Max plate voltage: 250 V
Max plate dissipation: 3.5 W

Triode AF voltage-amplifier section; promoted values use the published 200 V characteristic point.

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 Mullard

Published operating points and test conditions from this source.

SECTION 1

Pentode

Characteristics

Pentode plate voltage
170 V
Section1
Pentode screen-grid voltage
170 V
Section1
Pentode plate current
30 mA
Section1
Pentode screen-grid current
5 mA
Section1
Pentode control-grid voltage
-9.5 V
Section1
Pentode transconductance
5500 uS
Section1
Pentode plate resistance
53000 Ohm
Section1
Pentode screen-to-control-grid amplification factor
10 ratio
Section1

Other

Output power
2.2 W
ClassA;SingleEnded;Va=170V
Output power
2.5 W
ClassA;SingleEnded;Va=200V
Output power
5 W
ClassAB;PushPull;TwoTubes;Va=170V
Output power
7.2 W
ClassAB;PushPull;TwoTubes;Va=200V

Capacitance

Pentode output capacitance
4.7 pF
Section1

SECTION 2

Triode

Characteristics

Triode plate voltage
170 V
Section2;Point1
Triode plate current
1.6 mA
Section2;Point1
Triode transconductance
2100 uS
Section2;Point1
Triode plate resistance
40000 Ohm
Section2;Point1
Triode amplification factor
82 ratio
Section2;Point1
Triode plate voltage
200 V
Section2;Point2
Triode transconductance
2500 uS
Section2;Point2
Triode plate resistance
34000 Ohm
Section2;Point2
Triode amplification factor
85 ratio
Section2;Point2

Capacitance

Triode plate-to-grid capacitance
1.6 pF
Section2
Triode input capacitance
2.3 pF
Section2

Data set 02

1967 Mullard Receiving Tubes for Maintenance

Published operating points and test conditions from this source.

SECTION 1

Pentode

Other

separate cathodes and
100 mA
Published in approved UCL83.pdf target datasheet; Section2
Ca t _ gp <
0.1 pF
Published in approved UCL83.pdf target datasheet; Section2
Cat _ ap <
1.6 pF
Published in approved UCL83.pdf target datasheet; Section2
Cgt_ gp <
0.03 pF
Published in approved UCL83.pdf target datasheet; Section2
Cgt_a p <
0.05 pF
Published in approved UCL83.pdf target datasheet; Section2
Ca-gl <
0.2 pF
Published in approved UCL83.pdf target datasheet; Section2
' in
5.7 pF
Published in approved UCL83.pdf target datasheet; Section2
Cou t
4.7 pF
Published in approved UCL83.pdf target datasheet; Section2
Cg1_ h
0.4 pF
Published in approved UCL83.pdf target datasheet; Section2
Ca_ g
1.6 pF
Published in approved UCL83.pdf target datasheet; Section2
Cl n
2.3 pF
Published in approved UCL83.pdf target datasheet; Section2
' out D
32 pF
Published in approved UCL83.pdf target datasheet; Section2
la(o) 30
27 mA
Published in approved UCL83.pdf target datasheet; Section2
Ig 2 fO) 5.0
4.4 mA
Published in approved UCL83.pdf target datasheet; Section2
la(o) 2 x24 2 x
25 mA
Published in approved UCL83.pdf target datasheet; Section2
la (max. sig.) 2 x27 .5 2 x
29 mA
Published in approved UCL83.pdf target datasheet; Section2
Ig 2 (o) 2 x 3.8 2 x
3.9 mA
Published in approved UCL83.pdf target datasheet; Section2
Ig 2 (ma x . sig.) 2 x6.25 2 x
8.5 mA
Published in approved UCL83.pdf target datasheet; Section2
I k max
45 mA
Published in approved UCL83.pdf target datasheet; Section2
Ik max
15 mA
Published in approved UCL83.pdf target datasheet; Section2
separate cathode and
100 mA
Published in approved UCL83.pdf target datasheet; Section2

Characteristic

la
30 mA
Published in approved UCL83.pdf target datasheet; Section2
la 1.6
2.4 mA
Published in approved UCL83.pdf target datasheet; Section2
gm 2.1
2.5 mA
Published in approved UCL83.pdf target datasheet; Section2

SECTION 2

Triode

Other

separate cathodes and
100 mA
Published in approved UCL83.pdf target datasheet; Section1
Ca t _ gp <
0.1 pF
Published in approved UCL83.pdf target datasheet; Section1
Cat _ ap <
1.6 pF
Published in approved UCL83.pdf target datasheet; Section1
Cgt_ gp <
0.03 pF
Published in approved UCL83.pdf target datasheet; Section1
Cgt_a p <
0.05 pF
Published in approved UCL83.pdf target datasheet; Section1
Ca-gl <
0.2 pF
Published in approved UCL83.pdf target datasheet; Section1
' in
5.7 pF
Published in approved UCL83.pdf target datasheet; Section1
Cou t
4.7 pF
Published in approved UCL83.pdf target datasheet; Section1
Cg1_ h
0.4 pF
Published in approved UCL83.pdf target datasheet; Section1
Ca_ g
1.6 pF
Published in approved UCL83.pdf target datasheet; Section1
Cl n
2.3 pF
Published in approved UCL83.pdf target datasheet; Section1
' out D
32 pF
Published in approved UCL83.pdf target datasheet; Section1
la(o) 30
27 mA
Published in approved UCL83.pdf target datasheet; Section1
Ig 2 fO) 5.0
4.4 mA
Published in approved UCL83.pdf target datasheet; Section1
la(o) 2 x24 2 x
25 mA
Published in approved UCL83.pdf target datasheet; Section1
la (max. sig.) 2 x27 .5 2 x
29 mA
Published in approved UCL83.pdf target datasheet; Section1
Ig 2 (o) 2 x 3.8 2 x
3.9 mA
Published in approved UCL83.pdf target datasheet; Section1
Ig 2 (ma x . sig.) 2 x6.25 2 x
8.5 mA
Published in approved UCL83.pdf target datasheet; Section1
I k max
45 mA
Published in approved UCL83.pdf target datasheet; Section1
Ik max
15 mA
Published in approved UCL83.pdf target datasheet; Section1
separate cathode and
100 mA
Published in approved UCL83.pdf target datasheet; Section1

Characteristic

la
30 mA
Published in approved UCL83.pdf target datasheet; Section1
la 1.6
2.4 mA
Published in approved UCL83.pdf target datasheet; Section1
gm 2.1
2.5 mA
Published in approved UCL83.pdf target datasheet; Section1