Data set 01
1938 Raytheon
Published operating points and test conditions from this source.
SECTION 1
Cathode Ray
Application
Application
Oscilloscope_Display text
Specialized - Cathode Ray ·CathodeRay
5CEP11
Five-inch flat optical-glass CRT for high-resolution photographic and oscillographic recording, with electrostatic focusing, magnetic deflection, and P11 screen. Published anode capability reaches approximately 22 kV.
Directly heatedCold cathodeCommon cathodeDissimilarSpecialized
- Sections
- 1
- Base
- 12Q
- Socket code
- DUODECAL6
- Base pins
- 12
- Nominal heater
- 6.3 V / 600 mA
Description
Five-inch flat optical-glass CRT for high-resolution photographic/oscillographic recording, with electrostatic focus and magnetic deflection.
Socket description
Small-shell Duodecal 6-contact CRT base
General specifications
Tube and section characteristics
Properties common to every published source and operating point.
Heater and base
- Base
- 12Q
- Socket code
- DUODECAL6
- Base pins
- 12
- Nominal heater voltage
- 6.3 V
- Nominal heater current
- 600 mA
- Parallel heater voltage
- -
- Parallel heater current
- -
- Series capable
- No
12Q - 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
- 22000 V
Cathode-ray display/scanning system; published focusing, deflection and high-voltage data retained as parameters.
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
1950 Sylvania
Published operating points and test conditions from this source.
SECTION 1
Cathode Ray
Other
Heater Voltage
6.3 V
Nominal
Heater Current
600 mA
Nominal
Data set 03
1965 Sylvania Electronic Tubes Vol3
Published operating points and test conditions from this source.
SECTION 1
Cathode Ray
Capacitance
Grid No. 1 to all other electrodes capacitance
9 pF
Grid No. 2 to all other electrodes capacitance
7 pF
Cathode to all other electrodes capacitance
7 pF
Other
Maximum anode voltage
22000 V
Maximum grid No. 3 focus voltage
5000 V
Maximum grid No. 2 voltage
600 V
Maximum negative grid No. 1 bias magnitude
180 V
Peak heater-cathode voltage during warm-up
450 V
Peak heater-cathode voltage after warm-up
180 V
Typical anode voltage low-voltage condition
10000 V
Typical anode voltage high-voltage condition
20000 V
Typical focus voltage range at 10 kV
2070 to 2370 V
Typical focus voltage range at 20 kV
4140 to 4740 V
Typical grid No. 2 voltage
300 V
Grid No. 1 cutoff voltage range
-65 to -40 V
Characteristics
Typical line width
0.0015 in
CircuitValue
Grid No. 1 circuit resistance maximum
1.5 MOhm