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Tube Tinker — Electron Tube Database
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Voltage - Triode (single) ·Triode

BI

Four-volt indirectly heated receiving triode for general amplifier service.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
1
Base
-
Socket code
-
Base pins
7
Nominal heater
4 V / 1.1 A

Description

An indirectly heated triode with a 4 V, 1.1 A heater, 220 V operating point and 3 W maximum anode dissipation.

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base
-
Socket code
-
Base pins
7
Nominal heater voltage
4 V
Nominal heater current
1.1 A
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

Triode

X-ray radiationInterelectrode capacitances
Plate resistance
11000 Ω
Transconductance
0.0025 S
Max plate voltage
400 V
Max plate dissipation
3 W

Published ratings and characteristics promoted from the approved 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

1953 RFT Rundfunk Technik

Published operating points and test conditions from this source.

SECTION 1

Triode

Other

  • Anode voltage

    220 V

  • Cathode resistance

    300 Ω

  • Anode current

    10 mA

  • Durchgriff

    3.6 %

  • Cold anode voltage maximum

    400 V

  • Grid leak resistance maximum

    250 kΩ

Capacitance

  • Grid-anode capacitance

    1.7 pF