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Specialized - Ballast ·Ballast

NB7

Raytheon NB-series ballast regulator for 2-volt battery receivers, designed for filament strings drawing approximately 660 mA.

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

Description

NB7 is a Raytheon NB-series resistance/ballast tube for two-volt battery receivers, rated for 0.660 A filament drain.

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

Ballast

X-ray radiationInterelectrode capacitances

No fixed ratings are recorded for this section.

Resistance/ballast-tube battery-tap service and nominal filament drain captured in parameters.

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

1937 Raytheon Radio Receiving Tubes

Published operating points and test conditions from this source.

SECTION 1

Ballast

Characteristic

  • Nominal filament current drain

    660 mA

    NB ResistanceTube

Other

  • Battery tap

    2 V storage battery

    StorageBattery

  • Battery tap

    Air cell

    AirCell

  • Battery tap

    3 V dry cell pack

    DryCellPack