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
SC4009
Four-and-one-half by five-and-one-half inch direct-view oscilloscope CRT with electrostatic focusing and electrostatic deflection, designed for precision waveform display.
Directly heatedCold cathodeCommon cathodeDissimilarSpecialized
- Sections
- 1
- Base
- B12-37
- Socket code
- DIHEPTAL12
- Base pins
- 12
- Nominal heater
- 6.3 V / 600 mA
Description
Four-and-one-half by five-and-one-half inch direct-view oscilloscope CRT with electrostatic focus and electrostatic deflection.
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
- 4400 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 No. 2 voltage maximum
4400 V
Anode No. 1 voltage maximum
1650 V
Grid No. 1 negative bias maximum
-220 V
Grid No. 1 positive bias maximum
0 V
Grid No. 1 positive peak maximum
2 V
Peak heater-cathode voltage maximum
200 V
Peak Anode No. 2 to deflecting-plate voltage maximum
1200 V
Anode No. 2 voltage
2500 V
Anode No. 1 focus voltage
0 to 300 V
Grid No. 1 cutoff voltage
-56 to -34 V
Anode No. 2 current maximum
400 uA
Capacitance
Cathode to all other electrodes capacitance
5 pF
Grid No. 1 to all other electrodes capacitance
6.9 pF
Between deflecting plates 1-2 capacitance
4.5 pF
Between deflecting plates 3-4 capacitance
1.6 pF
Deflecting plate 1 to all other electrodes capacitance
9.3 pF
Deflecting plate 2 to all other electrodes capacitance
9.3 pF
Deflecting plate 3 to all other electrodes capacitance
6.3 pF
Deflecting plate 4 to all other electrodes capacitance
6.3 pF
Characteristic
Deflection factor plates 1-2
40 to 50 V/in
Deflection factor plates 3-4
31.5 to 38.5 V/in
P1 light output minimum
15 ft-L
Modulation maximum
40 V
Line width maximum
0.03 in
Deflection factor uniformity maximum
1 %
Pattern distortion at 100 percent useful scan maximum
1 %
CircuitValue
Grid No. 1 circuit resistance maximum
1.5 Mohm
Deflection circuit resistance maximum
1 Mohm