Skip to main content
Tube Tinker — Electron Tube Database
Alternatives & variationsDownload PDF datasheet

Specialized - Cathode Ray ·CathodeRay

6FP1

Rectangular mono-accelerator oscilloscope CRT with electrostatic focusing and deflection. Designed for improved performance without sacrificing spot size, light output, or sensitivity, it provides a bright precision trace.

Directly heatedCold cathodeCommon cathodeDissimilarSpecialized
Sections
1
Base
-
Socket code
B12A
Base pins
-
Nominal heater
6.3 V / 500 mA

Description

The ETC 6FP1 is a rectangular mono-accelerator electrostatic-focus and deflection cathode-ray tube designed for improved performance without sacrificing spot size, light output, or sensitivity.

Socket description

Duodecal 12-contact

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base
-
Socket code
B12A
Base pins
-
Nominal heater voltage
6.3 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

Cathode Ray

X-ray radiationInterelectrode capacitances

No fixed ratings are recorded for this section.

Cathode-ray electron-gun section; CRT-specific ratings are retained in TUBE_SECTION_PARAMETER because fixed plate/screen fields are not semantically equivalent.

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

1961 Electronic Tube Corp

Published operating points and test conditions from this source.

SECTION 1

Cathode Ray

Other

  • Heater voltage

    6.3 V

  • Heater current nominal

    500 mA

  • Maximum accelerator voltage

    3500 V

  • Maximum focusing voltage

    1500 V

  • Maximum accelerator-to-deflection-electrode voltage

    9200 V

  • Maximum negative grid-1 bias magnitude

    200 V

  • Maximum positive grid-1 bias

    0 V

  • Maximum heater-to-cathode voltage magnitude

    180 V

  • Typical accelerator voltage

    2500 V

  • Typical focusing voltage

    0 to 300 V

  • Typical grid-1 voltage

    -56 to -34 V

  • Modulation factor maximum

    40 V

  • Line width maximum

    0.03 in

  • Minimum P1 light output

    15 ft-L

  • Deflection factor D1-D2 minimum

    48 V/in

  • Deflection factor D1-D2 maximum

    60 V/in

  • Deflection factor D3-D4 minimum

    32 V/in

  • Deflection factor D3-D4 maximum

    42 V/in

Construction

  • Focusing method

    Electrostatic

  • Deflecting method

    Electrostatic

  • Electron gun / beam count

    1

Characteristic

  • Phosphor options

    P1,P2,P7,P11

Capacitance

  • Cathode to all other electrodes

    4.5 pF

  • Grid 1 to all other electrodes

    4.5 pF

  • D1 to D2

    3.5 pF

  • D3 to D4

    1.7 pF