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
Application
Application
Electrostatic charge printing
Specialized - Cathode Ray ·CathodeRay
SC3502
Sylvania special-purpose instrument CRT with electrostatic focusing and deflection and a P1 green screen. Its high-voltage ratings and beam-control characteristics suit precision oscillographic display.
Directly heatedCold cathodeCommon cathodeDissimilarSpecialized
- Sections
- 1
- Base
- -
- Socket code
- NEOEIGHTAR7
- Base pins
- -
- Nominal heater
- 1.5 V / 140 mA
Description
Sylvania SC3502 special-purpose CRT with electrostatic focus and electrostatic deflection; P1 green. Published high-voltage ratings, focus/deflection data, capacitances, circuit limits, and typical operating conditions were extracted from the supplied datasheet.
Socket description
Small-button Neoeightar 7-contact CRT base family
General specifications
Tube and section characteristics
Properties common to every published source and operating point.
Heater and base
- Base
- -
- Socket code
- NEOEIGHTAR7
- Base pins
- -
- Nominal heater voltage
- 1.5 V
- Nominal heater current
- 140 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
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
1.5 V
Heater Current
140 mA
FocusingMethod
Electrostatic
DeflectionMethod
Electrostatic
PhosphorOrScreen
P1 green
UsefulScreenOrScan
2 inch
LineWidthMaximum
0.45 mm
LightOutputMinimum
3 ft-L
Grid1 To All Capacitance
4.5 pF
Other
AnodeVoltageMaximum
3000 V
Grid1NegativeBiasMagnitudeMaximum
150 V
Grid1PositiveBiasMaximum
0 V
Grid1PositivePeakVoltageMaximum
2 V
Grid1CircuitResistanceMaximum
1.5 Mohm
HeaterCathodeVoltageMaximum
200 V
AfterWarmup
AnodeInputMaximum
6 W
FocusingElectrodeVoltageMaximum
1200 V
AltitudeMaximum
35000 ft
Anode Voltage
2000 V
FocusElectrodeVoltage
400 to 700 V
Grid1VoltageForCutoff
-40 to -70 V
DeflectionFactorD1D2
102 to 138 V/in
DeflectionFactorD3D4
58 to 78 V/in