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Power - TV Horizontal Output (sweep) ·Pentode

UL44

Series-heater television line-output pentode designed for horizontal time-base circuits with high peak plate-voltage capability.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
1
Base
-
Socket code
B8A
Base pins
8
Nominal heater
45 V / 100 mA

Description

Series-heater television line-output pentode for horizontal time-base circuits with high peak plate-voltage capability.

Socket description

Rimlock 8-contact

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base
-
Socket code
B8A
Base pins
8
Nominal heater voltage
45 V
Nominal heater current
100 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
Transconductance
0.007 S
Max plate voltage
300 V
Max screen voltage
300 V

Published ratings and characteristics promoted semantically from the approved source; identical repeated sections compressed where 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

1957 Philips Receiving and Amplifying Tubes

Published operating points and test conditions from this source.

SECTION 1

Pentode

Other

  • Plate Voltage

    175 V

  • Screen Voltage

    175 V

  • Screen Current

    4.7 mA

  • Maximum Repetitive Peak Plate Voltage

    3000 V

    Maximum 15 us per cycle

Characteristic

  • Transconductance

    7000 µS