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

Specialized - Switching Tube ·MicrowaveTRSwitch

1B38

Two-electrode cold-cathode pre-TR microwave gap for pulsed duplexer protection, characterized by microwave wavelength and VSWR performance.

Directly heatedCold cathodeCommon cathodeDissimilarSpecialized
Sections
1
Base
-
Socket code
-
Base pins
-
Nominal heater
-

Description

The 1B38 is a two-electrode cold-cathode Pre-TR gap listed in RMA Release No. 428 with microwave wavelength, VSWR and related RF characteristics.

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base
-
Socket code
-
Base pins
-
Nominal heater voltage
-
Nominal heater current
-
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

MicrowaveTRSwitch

X-ray radiationInterelectrode capacitances

No fixed ratings are recorded for this section.

Pre-TR gap; specialized RF parameters retained.

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

1968 General Electric Co

Published operating points and test conditions from this source.

SECTION 1

MicrowaveTRSwitch

Characteristic

  • Electrode Count

    2

  • Center Frequency Wavelength

    10.7 cm

Other

  • VSWR At Center Frequency

    1.05

  • Leakage Energy

    0.00013 J

  • Temperature Range

    -40 to 100 C