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
3BP1A
Three-inch direct-view oscilloscope CRT with electrostatic focusing and deflection and a P1 green medium-persistence screen. Its compact high-vacuum construction is intended for general oscillographic measurement service.
Directly heatedCold cathodeCommon cathodeDissimilarSpecialized
- Sections
- 1
- Base
- -
- Socket code
- OCTALCRT8
- Base pins
- -
- Nominal heater
- 6.3 V / 600 mA
Description
Sylvania 3BP1A direct-view oscilloscope CRT with electrostatic focus/deflection; P1 green, medium persistence. Published maximum ratings, capacitances, and typical operating conditions were extracted from the supplied datasheet.
Socket description
Octal 8-contact CRT base
General specifications
Tube and section characteristics
Properties common to every published source and operating point.
Heater and base
- Base
- -
- Socket code
- OCTALCRT8
- 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
- Max plate voltage
- 2000 V
- Max screen voltage
- 550 V
Electrostatic-focus/electrostatic-deflection CRT.
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
Characteristic
Heater Voltage
6.3 V
Heater Current
600 mA
FocusingMethod
Electrostatic
DeflectionMethod
Electrostatic
Phosphor
P1 green, medium persistence
MinimumUsefulScreen
2.75 in
Cathode To All Capacitance
8 pF
GridToAllCapacitance
8.5 pF
BetweenDeflectionPlates1_2Capacitance
2 pF
BetweenDeflectionPlates3_4Capacitance
2 pF
Other
Anode2VoltageMaximum
2200 V
Anode1FocusVoltageMaximum
1100 V
GridNegativeBiasMagnitudeMaximum
200 V
GridPositivePeakVoltageMaximum
0 V
PeakHeaterCathodeVoltageNegative
125 V
PeakVoltageAnode2ToDeflectionPlate
550 V
Anode2Voltage
2000 V
Anode1VoltageForFocus
400-690 V
GridVoltageForCutoff
-30 to -90 V
DeflectionFactorPlates1_2
200 V/in
DeflectionFactorPlates3_4
148 V/in
GridCircuitResistanceMaximum
1.5 Mohm
DeflectionCircuitResistanceMaximum
5 Mohm
Data set 03
1971 RCA HB3 Binder 1 of 7
Published operating points and test conditions from this source.
SECTION 1
Cathode Ray
Other
Heater voltage
6.3 V
Heater current
600 mA
Peak heater-cathode voltage, heater negative
125 V
Typical final accelerating anode voltage
1500 V
Maximum deflecting electrode voltage
550 V
Construction
Focusing method
Electrostatic
Deflection method
Electrostatic
Phosphor
P1
Characteristic
Fluorescence
Green
Persistence
Medium
Capacitance
Grid #1 to all other electrodes capacitance
8 pF
Approximate
Application
Application
Oscillograph/cathode-ray display