Data set 01
1961 Tung Sol
Published operating points and test conditions from this source.
SECTION 1
Cathode Ray
Capacitance
Heater Cathode Capacitance
5 pF
Approximate
Other
HighVoltageElectrodeMaximum
20000 V
CRT
Specialized - Cathode Ray ·CathodeRay
27RP4
Twenty-seven-inch direct-view television picture tube with aluminized gray-filter screen, magnetic focusing and deflection, unipotential cathode, and external single-field ion trap. High-voltage anode capability reaches about 20 kV.
Directly heatedCold cathodeCommon cathodeDissimilarSpecialized
- Sections
- 1
- Base
- 12N
- Socket code
- DUODECAL5
- Base pins
- 5
- Nominal heater
- 6.3 V / 600 mA
Description
The 27RP4 is a direct-view television picture tube using an aluminized grey-filter screen, magnetic focus and deflection, a unipotential cathode and an external single-field ion trap.
Socket description
Small-shell Duodecal 5-contact CRT base
General specifications
Tube and section characteristics
Properties common to every published source and operating point.
Heater and base
- Base
- 12N
- Socket code
- DUODECAL5
- Base pins
- 5
- Nominal heater voltage
- 6.3 V
- Nominal heater current
- 600 mA
- Parallel heater voltage
- -
- Parallel heater current
- -
- Series capable
- No
12N - 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
- 20000 V
- Max screen voltage
- 500 V
- Rectifier max heater-cathode voltage
- 410 V
Promoted values are taken from clearly identified printed ratings/characteristics.
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
1966 Tung Sol Electronic Tubes 4 of 4
Published operating points and test conditions from this source.
SECTION 1
Cathode Ray
Characteristic
Cathode to all other electrodes capacitance
5 pF
WholeTube
Grid 1 to all other electrodes capacitance
6 pF
WholeTube
External conductive coating to anode capacitance maximum
750 pF
WholeTube
External conductive coating to anode capacitance minimum
500 pF
WholeTube
Focusing method
Magnetic
WholeTube
Deflecting method
Magnetic
WholeTube
Horizontal deflection angle
85 degree
WholeTube
Diagonal deflection angle
90 degree
WholeTube
Phosphor color
White
Screen
Persistence
Medium
Screen
Other
Maximum DC anode/accelerator voltage
20000 V
WholeTube
Maximum DC grid 2 voltage
500 V
WholeTube
Maximum negative grid 1 bias magnitude
125 V
WholeTube
Maximum positive peak grid 1 voltage
2 V
WholeTube
Maximum heater-cathode voltage during warm-up
410 V
Warmup15Seconds
DC anode/accelerator voltage
16000 V
TypicalOperation
DC grid 2 voltage
300 V
TypicalOperation
Data set 03
1968 General Electric Co
Published operating points and test conditions from this source.
SECTION 1
Cathode Ray
Other
HeaterOrFilamentVoltageNominal
6.3 V
HeaterOrFilamentCurrentNominal
600 mA
MaxPlateVoltage
20000 V
MaxScreenVoltage
500 V
Typical Anode Voltage
16000 V
Capacitance
Cathode To All Other Electrodes Capacitance
5 pF
Grid1 To All Other Electrodes Capacitance
6 pF
ExternalCoatingToAnodeCapacitanceMinimum
500 pF
ExternalCoatingToAnodeCapacitanceMaximum
750 pF