Data set 01
1950 Sylvania
Published operating points and test conditions from this source.
SECTION 1
Cathode Ray
Characteristics
Focusing method
Electrostatic
Deflection method
Magnetic
Application
Application
Electrostatic charge printing
Specialized - Cathode Ray ·CathodeRay
SC3557
High-light-output special-purpose CRT with electrostatic focusing and magnetic deflection. Its construction emphasizes screen brightness for demanding electronic display applications.
Directly heatedCold cathodeCommon cathodeDissimilarSpecialized
- Sections
- 1
- Base
- -
- Socket code
- B9A
- Base pins
- -
- Nominal heater
- 1.5 V / 600 mA
Description
Sylvania SC3557 special-purpose CRT with electrostatic focus and magnetic deflection; high-light-output CRT. Published high-voltage ratings, focus/deflection data, capacitances, circuit limits, and typical operating conditions were extracted from the supplied datasheet.
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
- -
- Nominal heater voltage
- 1.5 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
- 17500 V
Special-purpose cathode-ray tube; published ratings and construction data captured.
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
Magnetic
PhosphorOrScreen
high-light-output CRT
UsefulScreenOrScan
special-purpose display
LineWidthMaximum
0.008 in
LightOutputMinimum
600 ft-L
BeamCurrent=100uA
Grid1 To All Capacitance
8 pF
Cathode To All Capacitance
6 pF
Other
AnodeVoltageMaximum
17500 V
Grid1NegativeBiasMagnitudeMaximum
150 V
Grid1PositiveBiasMaximum
0 V
Grid1PositivePeakVoltageMaximum
2 V
Grid1CircuitResistanceMaximum
1.5 Mohm
HeaterCathodeVoltageMaximum
200 V
AfterWarmup
Grid2VoltageTypical
500 V
Anode Voltage
15000 V
FocusElectrodeVoltage
-100 to +300 V
Grid1VoltageForCutoff
-33 to -77 V