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

BAS

Directly heated 3.5-volt receiving triode for battery-operated receiver service.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
1
Base
-
Socket code
-
Base pins
5
Nominal heater
3.5 V / 500 mA

Description

A directly heated triode closely related to BA, with a 3.5 V, 0.5 A filament and a published 220 V operating point.

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base
-
Socket code
-
Base pins
5
Nominal heater voltage
3.5 V
Nominal heater current
500 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 1

Triode

X-ray radiationInterelectrode capacitances
Plate resistance
25000 Ω
Transconductance
0.0006 S
Max plate voltage
400 V
Max plate dissipation
1.5 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

  • Grid bias

    -6 V

  • Anode current

    3 mA

  • Durchgriff

    6.6 %

  • Cold anode voltage maximum

    400 V

  • Grid leak resistance maximum

    600 kΩ

Capacitance

  • Grid-anode capacitance

    3.5 pF