Data set 01
1950 Sylvania
Published operating points and test conditions from this source.
SECTION 1
Cathode Ray
Characteristic
Heater Voltage
6.3 V
Heater Current
600 mA
Other
Maximum Anode Voltage
24200 V
Grid2 Voltage
660 V
Specialized - Cathode Ray ·CathodeRay
24ADP4
Large P4 monochrome television picture tube in the 24-inch class, designed for high-voltage direct-view service with manufacturer-specified focusing, magnetic deflection, and beam-control characteristics for type 24ADP4.
Directly heatedCold cathodeCommon cathodeDissimilarSpecialized
- Sections
- 1
- Base
- 12N
- Socket code
- B12D
- Base pins
- 5
- Nominal heater
- 6.3 V / 600 mA
Description
Large rectangular direct-view television picture tube with grey-filter aluminized screen, magnetic focus/deflection, conductive coating, and external ion trap.
Socket description
Duodecar 12-contact
General specifications
Tube and section characteristics
Properties common to every published source and operating point.
Heater and base
- Base
- 12N
- Socket code
- B12D
- Base pins
- 5
- Nominal heater voltage
- 6.3 V
- Nominal heater current
- 600 mA
- Parallel heater voltage
- -
- Parallel heater current
- -
- Series capable
- No
12N - 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
- 24200 V
- Max screen voltage
- 660 V
CRT electrode, focus, deflection and optical data preserved in parameter rows.
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 02
1961 Tung Sol
Published operating points and test conditions from this source.
SECTION 1
Cathode Ray
Other
Maximum Anode Voltage
24200 V
Typical Anode Voltage
18000 V
Maximum Grid2 Voltage
660 V
Typical Grid2 Voltage
300 V
Heater Warmup Time
11 s
Characteristic
FocusingMethod
Magnetic
DeflectingMethod
Magnetic
DiagonalDeflectionAngleApproximate
90 degree
PhosphorNumber
4
FluorescentColor
White
Faceplate
Gray filter; aluminized screen
Data set 03
1966 Tung Sol Electronic Tubes 4 of 4
Published operating points and test conditions from this source.
SECTION 1
Cathode Ray
Construction
Focusing method
Magnetic
Deflecting method
Magnetic
Phosphor
P4
White;MediumPersistence
External conductive coating
Present
Aluminized screen
Present
Characteristic
Deflection angle
70 deg
Approximate
Faceplate light transmission at center
75 %
Approximate
Other
Heater voltage
6.3 V
Heater current
600 mA
Maximum DC anode voltage
24200 V
Maximum DC grid #2 voltage
660 V
Maximum grid #1 negative-bias magnitude
125 V
Maximum grid #1 positive DC voltage
0 V
Maximum grid #1 positive peak voltage
2 V
Typical DC anode voltage
18000 V
TelevisionPictureTube
Typical DC grid #2 voltage
300 V
TelevisionPictureTube
Typical grid #1 voltage minimum
-72 V
VisualExtinctionRange
Typical grid #1 voltage maximum
-28 V
VisualExtinctionRange
Maximum grid #1 circuit resistance
1.5 megohm
Focusing coil current
125 mA
Approximate
Ion trap magnet rated strength
36 gauss
Approximate
Heater warm-up time
11 s
Maximum grid #1 circuit resistance
1.5 megohm
Ion trap current standard coil #117
32 mA
Approximate
Raster width
21.4375 in
Approximate
Raster height
16.875 in
Approximate
Capacitance
Cathode-to-all-other-electrodes capacitance
5 pF
Approximate
Grid #1-to-all-other-electrodes capacitance
6 pF
Approximate
Application
Application
Direct-view television picture tube