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Tube Tinker — Electron Tube Database
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Specialized - Cathode Ray ·CathodeRay-CathodeRay

5BFP1

Five-inch dual-beam post-accelerator oscilloscope CRT with electrostatic focusing and deflection plus integral magnetic shielding. Two independent beams permit simultaneous comparative waveform presentation.

Directly heatedCold cathodeCommon cathodeDissimilarSpecialized
Sections
2
Base
-
Socket code
B14A
Base pins
-
Nominal heater
6.3 V / 600 mA

Description

Dual-beam post-accelerator electrostatic-focus and electrostatic-deflection cathode-ray tube with integral magnetic shielding.

Socket description

Large readout/Nixie 14-contact base, 44.5 mm pin circle

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base
-
Socket code
B14A
Base pins
-
Nominal heater voltage
6.3 V
Nominal heater current
600 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

2 physical sections, each with unique specifications.

Section 1

Cathode Ray

X-ray radiationInterelectrode capacitances

No fixed ratings are recorded for this section.

CRT electron-gun/display section; CRT-specific ratings and operating data are stored as parameters.

Section 2

Cathode Ray

X-ray radiationInterelectrode capacitances

No fixed ratings are recorded for this section.

Second independent beam/gun section; same published electrical system.

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

1960 Du Mont

Published operating points and test conditions from this source.

SECTION 1

Cathode Ray

Characteristics

  • Focusing method

    1 code

    Electrostatic

  • Deflection method

    1 code

    Electrostatic

  • Deflection factor D1-D2

    -

    Published range 130 to 161 V/in

  • Deflection factor D3-D4

    -

    Published range 110 to 138 V/in

  • Minimum useful screen

    4 in

Other

  • Accelerator voltage maximum

    4000 V

  • Accelerator voltage

    2750 V

  • Post-accelerator voltage maximum

    15000 V

  • Post-accelerator voltage

    13250 V

  • Grid No. 1 voltage

    -

    Published range -65 to -35 V

  • Grid No. 1 negative bias maximum

    200 V

SECTION 2

Cathode Ray

Characteristics

  • Focusing method

    1 code

    Electrostatic

  • Deflection method

    1 code

    Electrostatic

  • Deflection factor D1-D2

    -

    Published range 130 to 161 V/in

  • Deflection factor D3-D4

    -

    Published range 110 to 138 V/in

  • Minimum useful screen

    4 in

Other

  • Accelerator voltage maximum

    4000 V

  • Accelerator voltage

    2750 V

  • Post-accelerator voltage maximum

    15000 V

  • Post-accelerator voltage

    13250 V

  • Grid No. 1 voltage

    -

    Published range -65 to -35 V

  • Grid No. 1 negative bias maximum

    200 V