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Rectifier - Half Wave ·Rectifier

3B26

Rugged high-vacuum diode for high-voltage clipping and rectifier applications. Its heavy heater, high inverse-voltage capability, and strong short-duration current handling suit pulse circuits.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
1
Base
8X
Socket code
IO
Base pins
8
Nominal heater
2.5 V / 4.75 A

Description

Rugged high-vacuum clipper diode for high-voltage applications.

Socket description

International Octal

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base
8X
Socket code
IO
Base pins
8
Nominal heater voltage
2.5 V
Nominal heater current
4.75 A
Parallel heater voltage
-
Parallel heater current
-
Series capable
No

8X - 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

Rectifier

X-ray radiationInterelectrode capacitances
Rectifier peak inverse voltage
15000 V
Rectifier nominal output current
2 mA
Rectifier peak forward current
8 A
Rectifier forward voltage drop
130 V
Rectifier max heater-cathode voltage
130 V
Rectifier warm-up time
120 s

Maximum rectifier values from catalog table.

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

1938 Raytheon

Published operating points and test conditions from this source.

SECTION 1

Rectifier

Characteristics

  • Heater or filament voltage

    2.5 V

    Published nominal value

  • Heater or filament current

    4.75 A

    Published nominal value

  • Forward voltage drop

    130 V

    Published typical value

Other

  • Peak inverse voltage

    15000 V

    Published rating

  • Average or DC output current

    2 mA

    Published rating

  • Peak forward current

    8 A

    Published rating

Data set 02

195X Raytheon Special Purpose Tubes

Published operating points and test conditions from this source.

SECTION 1

Rectifier

Other

  • Maximum Peak Inverse Voltage

    15000 V

  • Maximum Peak Plate Current

    8000 mA

  • Maximum DC Output Current

    20 mA

  • Maximum Heater-Cathode Voltage

    130 V