Data set 01
1940 RCA
Published operating points and test conditions from this source.
SECTION 1
Cathode Ray
Application
Application
TelevisionPictureTube text
Specialized - Cathode Ray ·CathodeRay
7AP4
Seven-inch P4 cathode-ray display tube with a white screen, using manufacturer-specified focusing and deflection characteristics for direct visual display in type 7AP4.
Directly heatedCold cathodeCommon cathodeDissimilarSpecialized
- Sections
- 1
- Base
- -
- Socket code
- -
- Base pins
- -
- Nominal heater
- 2.5 V / 2.1 A
Description
Seven-inch magnetic-deflection kinescope for black-and-white television picture reproduction.
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
- 2.5 V
- Nominal heater current
- 2.1 A
- 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
- 3500 V
Television kinescope with magnetic deflection.
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.