Data set 01
1982 Toshiba
Published operating points and test conditions from this source.
SECTION 1
Cathode Ray
Other
Ultor Voltage
3000 V
Ultor Input
6 W
Grid No. 4 Focusing Voltage
1500 V
Specialized - Cathode Ray ·CathodeRay
3BJP4
Three-inch round-face viewfinder cathode-ray tube with electrostatic focusing and magnetic deflection. Its compact direct-view construction is intended for camera or television viewfinder service rather than general-purpose oscillography.
Directly heatedCold cathodeCommon cathodeDissimilarSpecialized
- Sections
- 1
- Base
- -
- Socket code
- B9A
- Base pins
- 12
- Nominal heater
- 6.3 V / 300 mA
Description
3-inch round-face view-finder CRT; electrostatic focus and magnetic deflection.
Socket description
Small-button Noval 9-contact
General specifications
Tube and section characteristics
Properties common to every published source and operating point.
Heater and base
- Base
- -
- Socket code
- B9A
- Base pins
- 12
- Nominal heater voltage
- 6.3 V
- Nominal heater current
- 300 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
- Max plate voltage
- 3000 V
- Max plate dissipation
- 6 W
Ultor maximum 3000 V; electrostatic focus and 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.