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Tube Tinker — Electron Tube Database
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Diode (NOT rectifier) ·Diode

2D1S

Indirectly heated UHF detector and measuring diode.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
1
Base
-
Socket code
-
Base pins
-
Nominal heater
2.3 V / 400 mA

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
2.3 V
Nominal heater current
400 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 0

Diode

X-ray radiationInterelectrode capacitances

No fixed ratings are recorded for this section.

UHF measuring diode; typical Va 5 V, Ia 1.6 mA; reverse anode voltage 100 V; anode power 0.01 W.

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

2026 Russian Receiving

Published operating points and test conditions from this source.

SECTION 0

Diode

Characteristic

  • Plate Voltage

    5 V

    Typical anode voltage

Other

  • Heater/filament voltage

    2.3 V

    Heater voltage

  • Heater/filament current

    400 mA

    Heater current