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Power - TV Horizontal Output (sweep) ·Pentode

PL81F

Power pentode designed for television horizontal line time-base service and also suitable for sound-output amplification.

Directly heatedCold cathodeCommon cathodeDissimilar

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

Description

Power pentode for sound output and television horizontal line time-base service.

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: 21.5 V
Nominal heater current: 300 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

1 physical section, each with unique specifications.

Section 1

Pentode

X-ray radiationInterelectrode capacitances

Plate resistance: 11000 Ω
Transconductance: 0.006 S
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

Pentode section; promoted values are taken from the approved source where explicitly published.

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

1953 La Radiotechnique

Published operating points and test conditions from this source.

SECTION 1

Pentode

Characteristic

Indirect (cathode isolee du filament)
3 A
Pentode
Alimentation du filament en serie. t Vf
21.5 V
Pentode

Other

Plate voltage
200 V
Pentode
Screen-grid voltage
200 V
Pentode
Control-grid voltage
28 V
Pentode
Plate current
40 mA
Pentode
Plate resistance
11 kohm
Pentode
Transconductance
6 mA/V
Pentode
Haute tension
200 V
Pentode
Suppressor-grid voltage
0 V
Pentode
Resistance commune aux grilles2, Rg 1 000 1000 Q
1000 ohm
Pentode
Control-grid voltage
315 V
Pentode
Load impedance
500 ohm
Pentode
Plate current
87 mA
Pentode
Screen-grid current
125 mA
Pentode
Output power
20 W
Pentode
Control-grid capacitance
14.7 pF
Pentode
Plate capacitance
6.4 pF
Pentode
Capacite anode-grille 1
8 pF
Pentode
Plate voltage
250 V
Pentode
Screen-grid voltage
250 V
Pentode
Plate dissipation . Pa
8 W
Pentode
Screen-grid dissipation. Pg
45 W
Pentode
+ grille 2)
10 W
Pentode
Cathode current
180 mA
Pentode
Grid-circuit resistance 1 Rgy
5 Mohm
Pentode
Heater-cathode voltage. Vki
200 V
Pentode
250 mA pour : Va
170 V
Pentode
310 mA pour : Va
200 V
Pentode
(2) Pendant le temps d'echauffement de la cathode, Pgep
6 W
Pentode
Vql-0v
0 v
Pentode