Data set 01
1950 Sylvania
Published operating points and test conditions from this source.
SECTION 1
Cathode Ray
Other
HeaterVoltageNominal
6.3 V
Nominal
HeaterCurrentNominal
600 mA
Nominal
Anode Voltage
7000 V
RadarIndicator
Specialized - Cathode Ray ·CathodeRay
7BP2A
Seven-inch CRT with magnetic focusing and deflection and a P2 blue-green/green long-persistence screen. Sylvania documentation provides electrical ratings, capacitances, and operating conditions for persistent instrument display.
Directly heatedCold cathodeCommon cathodeDissimilarSpecialized
- Sections
- 1
- Base
- -
- Socket code
- IO
- Base pins
- 8
- Nominal heater
- 6.3 V / 600 mA
Description
Sylvania seven-inch CRT with magnetic focus, magnetic deflection, and P2 blue-green/green, long persistence. Published electrical ratings, capacitances, and operating conditions were extracted from the supplied datasheet.
Socket description
International Octal
General specifications
Tube and section characteristics
Properties common to every published source and operating point.
Heater and base
- Base
- -
- Socket code
- IO
- Base pins
- 8
- 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
- 8800 V
Magnetic radar-indicator CRT; explicit X-ray warning.
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
6.5 V
Heater Current
600 mA
FocusingMethod
Magnetic
DeflectionMethod
Magnetic
Deflection Angle
53 degree
Phosphor
P2 blue-green/green, long persistence
MinimumUsefulScreen
6 in
Cathode To All Capacitance
5 pF
Grid1 To All Capacitance
8.5 pF
Grid2 To All Capacitance
7 pF
Other
Grid1CircuitResistanceMaximum
1.5 Mohm
AnodeVoltageMaximum
8800 V
Grid2VoltageMaximum
770 V
Grid1NegativeBiasMagnitudeMaximum
200 V
HeaterCathodeVoltageMaximum
140 V
Anode Voltage
4000 V
LowVoltage
Anode Voltage
7000 V
HighVoltage
Grid2 Voltage
250 V
Grid1VoltageForCutoff
-25 to -70 V
FocusCoilCurrent
75 mA
Anode=4000V;Minimum
FocusCoilCurrent
102 mA
Anode=4000V;Maximum
FocusCoilCurrent
99 mA
Anode=7000V;Minimum
FocusCoilCurrent
135 mA
Anode=7000V;Maximum
AnodeInputPowerMaximum
6 W