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Power - Pentode (NOT beam) ·Pentode

45B5

Series-string power pentode, also designated UL84, for audio-output service in transformerless equipment and low-voltage output stages.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
1
Base
-
Socket code
B9A
Base pins
9
Nominal heater
45 V / 100 mA

Description

Series-string power pentode, co-designated UL84; the supplied table states electrical characteristics are identical to 6CW5/EL86.

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
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

No fixed ratings are recorded for this section.

Published ratings and characteristics promoted from the supplied Rogers/Rogers Majestic source.

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

1959 Rogers

Published operating points and test conditions from this source.

SECTION 1

Pentode

Characteristic

  • HeaterOrFilamentVoltage

    45 V

  • HeaterOrFilamentCurrent

    100 mA

Data set 02

1963 Amperex Condensed

Published operating points and test conditions from this source.

SECTION 1

Pentode

Other

  • Heater voltage

    45 V

    SeriesString

  • Heater current

    100 mA

    SeriesString

  • Electrical equivalence

    6CW5 / EL86

    IdenticalElectricalCharacteristics