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9QP4

Nine-inch lightweight television picture tube designed for small portable receivers, with a low-current heater suitable for series-string operation. General Electric documentation emphasizes compact size and reduced receiver power requirements.

Directly heatedCold cathodeCommon cathodeDissimilarSpecialized

Sections: 1
Base: 12AD
Socket code: -
Base pins: 12
Nominal heater: 9.4 V / 300 mA

Description

The 9QP4 is a television picture tube designed for small size, light weight, and a low-current heater for series-string operation, particularly suitable for small portable television receivers.

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base: 12AD
Socket code: -
Base pins: 12
Nominal heater voltage: 9.4 V
Nominal heater current: 300 mA
Parallel heater voltage: -
Parallel heater current: -
Series capable: No

12AD - 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.

Television picture-tube cathode-ray section; CRT ratings preserved 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

1968 General Electric Co

Published operating points and test conditions from this source.

SECTION 1

Cathode Ray

Other

AnodeVoltageMax
6800 V
CathodeDrive
Grid2VoltageMax
300 V
CathodeDrive
AnodeVoltageTypical
5500 V
CathodeDrive
Grid2VoltageTypical
200 V
CathodeDrive
Heater Current
300 mA
GENERAL
Heater Warm-up time
11 s
GENERAL
Diagonal
70 deg
GENERAL
Horizontal
61 deg
GENERAL
Vertical
49 deg
GENERAL
During Warm-up Period not to Exceed
15 s
MAXIMUM RATINGS
Anode Voltagem
5500 V
MAXIMUM RATINGS
Focusing-Electrode Voltage for Focus
0 to 400 V
MAXIMUM RATINGS
Focusing-Electrode Current
15 to 25 uA
MAXIMUM RATINGS
Grid-No 2 Voltage e
200 V
MAXIMUM RATINGS
Cathode to Grid-No 1 Voltage
428 to 52 V
MAXIMUM RATINGS
lon-Trap Field Intensity A approximate i
22 G
MAXIMUM RATINGS
less than
3500 V
w Brightness and focus quality decrease with decreasing anod
ASingle-field ion-trap magnet adjusted to optimum position equivalent to
22 mA
w Brightness and focus quality decrease with decreasing anod