Data set 01
1950 Sylvania
Published operating points and test conditions from this source.
SECTION 1
Cathode Ray
Characteristic
HeaterOrFilamentVoltage
6.3 V
HeaterOrFilamentCurrent
600 mA
Specialized - Cathode Ray ·CathodeRay
SC4022
Sylvania high-voltage electrostatic cathode-ray instrument tube with multiple deflection plates and anode ratings to 15 kV, intended for precision waveform and measurement display.
Directly heatedCold cathodeCommon cathodeDissimilarSpecialized
- Sections
- 1
- Base
- B12-37
- Socket code
- DIHEPTAL12
- Base pins
- 12
- Nominal heater
- 6.3 V / 600 mA
Description
Ten-inch direct-view oscilloscope CRT with electrostatic focus/deflection, post-deflection acceleration, aluminized P31 screen, and gray-filter faceplate.
Socket description
Medium-shell Diheptal 12-contact CRT base
General specifications
Tube and section characteristics
Properties common to every published source and operating point.
Heater and base
- Base
- B12-37
- Socket code
- DIHEPTAL12
- Base pins
- 12
- Nominal heater voltage
- 6.3 V
- Nominal heater current
- 600 mA
- Parallel heater voltage
- -
- Parallel heater current
- -
- Series capable
- No
B12-37 - 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
- 15000 V
Ratings and characteristics promoted from the supplied Sylvania source where explicitly published.
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
Other
Heater voltage
6.3 V
Heater current
540 mA to 660 mA
Anode input maximum
6 W
Anode No. 3 voltage maximum
15000 V
Anode No. 2 voltage maximum
10000 V
Anode No. 1 voltage maximum
3500 V
Grid No. 1 negative bias maximum
-200 V
Grid No. 1 positive bias maximum
0 V
Grid No. 1 positive peak maximum
2 V
Peak heater-cathode voltage maximum
180 V
Peak Anode No. 2 to deflecting-plate voltage maximum
1500 V
Anode No. 3 voltage
12000 V
Anode No. 2 voltage
8000 V
Astigmatism correction voltage
0 to 200 V
Anode No. 1 focus voltage
2000 to 2400 V
Grid No. 1 cutoff voltage
-100 to -70 V
Capacitance
Cathode to all other electrodes capacitance
7 pF
Grid No. 1 to all other electrodes capacitance
8.5 pF
Between deflecting plates 1-2 capacitance
4 pF
Between deflecting plates 3-4 capacitance
3.5 pF
Deflecting plate 1 to all other electrodes capacitance
13 pF
Deflecting plate 2 to all other electrodes capacitance
13 pF
Deflecting plate 3 to all other electrodes capacitance
8.5 pF
Deflecting plate 4 to all other electrodes capacitance
8.5 pF
Characteristic
Deflection factor plates 1-2
200 to 245 V/in
Deflection factor plates 3-4
180 to 210 V/in
Modulation maximum
27 V
CircuitValue
Grid No. 1 circuit resistance maximum
2 Mohm
Deflection-plate circuit resistance maximum
1 Mohm