Skip to main content
Tube Tinker — Electron Tube Database
Alternatives & variationsDownload PDF datasheet

Rectifier - Full Wave ·Rectifier-Rectifier

26Z5W

Premium ruggedized double-diode rectifier for airborne and demanding equipment. Rated for approximately 1.375 kV peak inverse voltage and 100 mA DC output, supporting half-wave, full-wave, or voltage-doubler circuits.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
2
Base
9BS
Socket code
B9A
Base pins
9
Nominal heater
26.5 V / 200 mA

Description

The 26Z5W is a premium ruggedized heater-cathode double diode suitable for half-wave or full-wave rectification and voltage-doubler service, with a 26.5-volt heater suited to airborne 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
9BS
Socket code
B9A
Base pins
9
Nominal heater voltage
26.5 V
Nominal heater current
200 mA
Parallel heater voltage
-
Parallel heater current
-
Series capable
No

9BS - 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

Rectifier

X-ray radiationInterelectrode capacitances
Rectifier peak inverse voltage
1375 V
Rectifier nominal output current
100 mA
Rectifier peak forward current
1 A
Rectifier forward voltage drop
22 V
Rectifier max heater-cathode voltage
450 V

Representative row for two identical diode sections; published full-wave output current 100 mA.

Section 2

Rectifier

X-ray radiationInterelectrode capacitances
Rectifier peak inverse voltage
1375 V
Rectifier nominal output current
100 mA
Rectifier peak forward current
1 A
Rectifier forward voltage drop
22 V
Rectifier max heater-cathode voltage
450 V

Second physical rectifier section; electrical properties populated from the documented identical section.

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

195X General Electric Essential Characteristics

Published operating points and test conditions from this source.

SECTION 1

Rectifier

Characteristic

  • Heater/filament voltage

    26.5 V

    Published heater/filament rating

  • Heater/filament current

    200 mA

    Published heater/filament rating

  • Tube voltage drop

    22 V

    At 100 mA DC

Other

  • DC output current

    50 mA

    FullWave

  • Peak inverse voltage

    1250 V

    FullWave

  • RMS supply voltage

    325 V

    FullWave

  • Peak current

    300 mA

    FullWave

SECTION 2

Rectifier

Characteristic

  • Heater/filament voltage

    26.5 V

    Published heater/filament rating

  • Heater/filament current

    200 mA

    Published heater/filament rating

  • Tube voltage drop

    22 V

    At 100 mA DC

Other

  • DC output current

    50 mA

    FullWave

  • Peak inverse voltage

    1250 V

    FullWave

  • RMS supply voltage

    325 V

    FullWave

  • Peak current

    300 mA

    FullWave

Data set 02

1961 Tung Sol

Published operating points and test conditions from this source.

SECTION 1

Rectifier

Other

  • AC Plate Supply Voltage

    325 V

    CapacitorInputFilter;EachPlate

  • AC Plate Supply Voltage

    450 V

    ChokeInputFilter;EachPlate

Characteristic

  • DC Output Voltage

    305 V

    CapacitorInputFilter

  • DC Output Voltage

    380 V

    ChokeInputFilter

SECTION 2

Rectifier

Other

  • AC Plate Supply Voltage

    325 V

    CapacitorInputFilter;EachPlate

  • AC Plate Supply Voltage

    450 V

    ChokeInputFilter;EachPlate

Characteristic

  • DC Output Voltage

    305 V

    CapacitorInputFilter

Data set 03

1966 Tung Sol Electronic Tubes 3 of 4

Published operating points and test conditions from this source.

SECTION 1

Rectifier

Other

  • Peak inverse plate voltage

    1375 V

    WholeTube

  • Maximum DC plate current each plate

    300 mA

    WholeTube

  • Maximum DC output current per plate

    55 mA

    WholeTube

  • Maximum surge current

    1 A

    WholeTube

  • AC plate supply voltage each plate RMS

    325 V

    FullWave CapacitorInputFilter

  • DC output current

    135 mA

    FullWave CapacitorInputFilter

  • DC output voltage at filter input

    325 V

    FullWave CapacitorInputFilter

  • AC plate supply voltage each plate RMS

    450 V

    FullWave ChokeInputFilter

  • Output choke

    10 H

    FullWave ChokeInputFilter

  • DC output current

    105 mA

    FullWave ChokeInputFilter

  • DC output voltage at filter input

    380 V

    FullWave ChokeInputFilter

SECTION 2

Rectifier

Other

  • Peak inverse plate voltage

    1375 V

    WholeTube

  • Maximum DC plate current each plate

    300 mA

    WholeTube

  • Maximum DC output current per plate

    55 mA

    WholeTube

  • Maximum surge current

    1 A

    WholeTube

  • AC plate supply voltage each plate RMS

    325 V

    FullWave CapacitorInputFilter

  • DC output current

    135 mA

    FullWave CapacitorInputFilter

  • DC output voltage at filter input

    325 V

    FullWave CapacitorInputFilter

  • AC plate supply voltage each plate RMS

    450 V

    FullWave ChokeInputFilter

  • Output choke

    10 H

    FullWave ChokeInputFilter

  • DC output current

    105 mA

    FullWave ChokeInputFilter

  • DC output voltage at filter input

    380 V

    FullWave ChokeInputFilter