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Specialized - Cathode Ray ·CathodeRay

7MP14

Seven-inch direct-view radar indicator CRT with magnetic focusing and deflection and a P14 purple/orange medium-long-persistence screen. Sylvania specifies anode capability to approximately 8.8 kV.

Directly heatedCold cathodeCommon cathodeDissimilarSpecialized
Sections
1
Base
-
Socket code
DUODECAL5
Base pins
-
Nominal heater
6.3 V / -

Description

Seven-inch direct-view radar indicator CRT with magnetic focus/deflection and P14 purple/orange medium-long-persistence screen.

Socket description

Small-shell Duodecal 5-contact CRT base

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base
-
Socket code
DUODECAL5
Base pins
-
Nominal heater voltage
6.3 V
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

Cathode Ray

X-ray radiationInterelectrode capacitances
Max plate voltage
8800 V
Max screen voltage
770 V

CRT electron-gun/display section.

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

1965 Sylvania Electronic Tubes Vol3

Published operating points and test conditions from this source.

SECTION 1

Cathode Ray

Other

  • Maximum Grid No. 2/screen voltage

    770 V

    Published maximum Grid No. 2 voltage

  • Maximum plate/anode voltage

    8800 V

    Published maximum plate/anode voltage

  • Anode Voltage

    8800 V

    Anode Voltage . 8,800Volts dc

  • Grid No. 2 Voltage

    770 V

    Grid No. 2 Voltage 770 Volts dc

  • Heater Negative with Respect to Cathode

    140 V

    Heater Negative with Respect to Cathode . 140 Volts

  • Heater Positive with Respect to Cathode

    140 V

    Heater Positive with Respect to Cathode 140 Volts

  • Anode Voltage2 4o00 7o

    0 V

    Anode Voltage2 4o00 7o00 Volts dc

  • Grid No. 2 Voltage 250

    250 V

    Grid No. 2 Voltage 250 250 Volts dc A Division of

  • Grid No. 1 Voltage for Cutoff3 -27 to -63 -27 to

    -63 V

    Grid No. 1 Voltage for Cutoff3 -27 to -63 -27 to -63 Volts dc SYI.VANIA ELECIRIC PRODUCTS, Inc.

  • Grid No. 1 Circuit Resistance

    1.5 Mohm

    Grid No. 1 Circuit Resistance . 1.5 Megohms Max. EMPORIU M, PENNSYI.VANIA

Characteristic

  • Heater Voltage

    6.3 V

    Heater Voltage 6.3 Volts