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Power - TV Horizontal Output (sweep) ·Pentode

PL81

Television line-time-base output pentode designed to scan wide-angle CRTs from relatively low HT supply voltages.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 1
Base: Noval
Socket code: B9A
Base pins: 9
Nominal heater: 21.5 V / 300 mA

Description

Television line-time-base output pentode for scanning wide-angle CRTs from low HT supply voltages.

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: Noval
Socket code: B9A
Base pins: 9
Nominal heater voltage: 21.5 V
Nominal heater current: 300 mA
Parallel heater voltage: -
Parallel heater current: -
Series capable: No

Noval - Terminal pinout

Electrical assignments shared by every tube using this base designation.

No verified pinout is recorded for this base designation.

Section ratings

1 physical section, each with unique specifications.

Section 1

Pentode

X-ray radiationInterelectrode capacitances

Plate resistance: 10000 Ω
Transconductance: 0.0062 S
Amplification factor: 5.3
Max plate voltage: 250 V
Max screen voltage: 250 V
Max plate dissipation: 8 W
Max screen dissipation: 4.5 W
Max cathode current: 180 mA

Published values promoted where clearly readable; identical repeated 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

1951 Philips Receiving Tubes for Television

Published operating points and test conditions from this source.

SECTION 1

Pentode

Characteristics

Anode Voltage
200 V
Screen Voltage
200 V
Control Grid Voltage
-28 V
Anode Current
40 mA
Screen Current
2.8 mA
Transconductance
6000 uS

Other

Positive Peak Anode Voltage
7000 V
PulseInput
Anode Voltage
200 V
PushPull; TwoTubes; ClassB
Power Output
20 W
PushPull; TwoTubes; ClassB
Anode-to-Anode Matching Resistance
2500 ohm
PushPull; TwoTubes; ClassB

Data set 02

1958 Brimar Radio Valve No 7

Published operating points and test conditions from this source.

SECTION 1

Pentode

Other

Peak Positive Plate Pulse Voltage
7000 V
LineFlyback

Characteristic

Application
Television line time-base output

Data set 03

1958 Mullard Receiving Tubes

Published operating points and test conditions from this source.

SECTION 1

Pentode

Characteristics

Plate Voltage
170 V
Screen Voltage
170 V
Plate Current
45 mA
Screen Current
3 mA

Data set 04

195X Tesla

Published operating points and test conditions from this source.

SECTION 1

Pentode

Characteristics

Heater voltage
21.5 V
Published nominal value or midpoint of published range
Heater current
300 mA
Published nominal value or midpoint of published range

Capacitance

Input capacitance
16 pF
Published first-page value
Output capacitance
7 pF
Published first-page value

Data set 05

1961 Ferranti Technical Handbook

Published operating points and test conditions from this source.

SECTION 1

Pentode

Characteristics

Heater Voltage
21.5 V
Heater Current
300 mA

Data set 06

1963 Philips Electron Tubes Handbook V1

Published operating points and test conditions from this source.

SECTION 1

Pentode

Other

Plate voltage
170 V
HorizontalDeflection
Screen voltage
170 V
HorizontalDeflection
Control-grid voltage
-22 V
HorizontalDeflection
Plate current
45 mA
HorizontalDeflection
Screen current
3 mA
HorizontalDeflection

Characteristic

Transconductance
6200 µS
Section1
Plate resistance
10000 Ω
170VPlate
Amplification factor
5.3
Section1

Data set 07

1972 Philips Receiving Tubes

Published operating points and test conditions from this source.

SECTION 1

Pentode

Characteristics

Heater voltage
21.5 V
Published nominal value
Heater current
300 mA
Published nominal value

Other

Maximum peak anode voltage
7 kV
Pulse duration <=22% cycle, max 18 us

Data set 08

1973 Mazda Valves Binder 2

Published operating points and test conditions from this source.

SECTION 1

Pentode

Characteristics

Heater voltage
21.5 V
Published nominal value
Heater current
300 mA
Published nominal value

Other

Maximum plate dissipation
7.5 W
Published maximum rating
Maximum positive peak anode voltage
7 kV
Pulse duration <=22% cycle, max 18 us

Data set 09

1999 Philips E-Z

Published operating points and test conditions from this source.

SECTION 1

Pentode

Other

Anode peak voltage Vap max
7 kv
Anode peak voltage Vap max. 7 kv
Cathode current Ik max
180 mA
Cathode current Ik max. 180 mA
Heater current I¢
300 mA
Heater current I¢ 300 mA
Heater voltage Vi
215 V
Heater voltage Vi 215V
Grid No. 1 to all except anode Cgi(a)
14 pF
Grid No. 1 to all except anode Cgi(a) 14 pF
Anode to grid No
1 pF
Anode to grid No. 1 pF
Anode to cathode Cak max
0.1 pF
Anode to cathode Cak max. 0.1 pF
The minimum required cut-off voltage (-Vgl) during flyback is
120 V
The minimum required cut-off voltage (-Vgl) during flyback is 120V atVy=6000V,
The minimum required cut-off voltage (-Vgl) during flyback is 120V atVy
6000 V
The minimum required cut-off voltage (-Vgl) during flyback is 120V atVy=6000V,
Vg2
190 V
Vg2 =190 V and Zgl =1 k&2 at line frequency.
Anode voltage Va, max
550 V
Anode voltage Va, max. 550 V
Cathode to heater voltage Vkf max
200 V
Cathode to heater voltage Vkf max. 200 V
Grid No. 1 resistor Rgy max
0.5 MΩ
Grid No. 1 resistor Rgy max. 0.5 MQ
During the heating-up of the cathode Wg, = max
6 W
2) During the heating-up of the cathode Wg, = max. 6 W.