Data set 01
1950 Sylvania
Published operating points and test conditions from this source.
SECTION 1
Cathode Ray
Characteristics
Focusing method
Electrostatic
Deflection method
Electrostatic
Specialized - Cathode Ray ·CathodeRay
4VP7
Three-and-a-half-inch square direct-view instrument CRT with electrostatic focusing and deflection, post-deflection acceleration, and a blue-white P7 display providing persistent trace visibility.
Directly heatedCold cathodeCommon cathodeDissimilarSpecialized
- Sections
- 1
- Base
- -
- Socket code
- B12A
- Base pins
- -
- Nominal heater
- 6.3 V / 600 mA
Description
The Sylvania 4VP7 is a 3.5-inch square direct-view CRT with electrostatic focus and deflection, post-deflection acceleration, and a blue-white display.
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
- 600 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.
Published source values promoted where applicable.
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
1965 Sylvania Electronic Tubes Vol3
Published operating points and test conditions from this source.
SECTION 1
Cathode Ray
Characteristics
Focusing method
1 code
Electrostatic
Deflection method
1 code
Electrostatic
Deflection factors
1 code
Published on source sheet; OCR did not preserve numeric columns reliably
Useful screen / scan
1 code
approximately 3.5-inch square direct-view screen
Phosphor designation
1 code
P7
Light output P1
25 ft-lambert
AtIb3=25uA
Other
Anode No. 2 / accelerator voltage maximum
2750 V
Post-accelerator / Anode No. 3 voltage maximum
5500 V
Anode No. 2 / accelerator voltage
2000 V
Post-accelerator / Anode No. 3 voltage
4000 V
Focusing electrode voltage maximum
1100 V
Focusing electrode voltage minimum
200 V
Focusing electrode voltage maximum
500 V
Grid No. 1 cutoff voltage minimum
-135 V
Grid No. 1 cutoff voltage maximum
-58 V
Peak heater-to-cathode voltage
180 V
Peak voltage between accelerator and any deflection plate
600 V
Grid No. 1 negative bias maximum
200 V
Anode No. 2 input maximum
6 W
Post-accelerator to accelerator voltage ratio
2 ratio