Data set 01
1950 General Electric Transmitting Types
Published operating points and test conditions from this source.
SECTION 1
Cathode Ray
Characteristics
Focusing method
Electrostatic
Deflection method
Electrostatic
Phosphor
P1
Specialized - Cathode Ray ·CathodeRay
3KP1
Three-inch cathode-ray tube for oscilloscope and instrument display service, using electrostatic focusing and electrostatic deflection. Its P1 screen designation identifies the phosphor variant within this compact oscillographic family.
Directly heatedCold cathodeCommon cathodeDissimilarSpecialized
- Sections
- 1
- Base
- -
- Socket code
- OCTALCRT8
- Base pins
- -
- Nominal heater
- 6.3 V / 600 mA
Description
Sylvania 3KP1 direct-view oscilloscope CRT with electrostatic focus/deflection; P1 green, medium persistence. Published maximum ratings, capacitances, and typical operating conditions were extracted from the supplied datasheet.
Socket description
Octal 8-contact CRT base
General specifications
Tube and section characteristics
Properties common to every published source and operating point.
Heater and base
- Base
- -
- Socket code
- OCTALCRT8
- Base pins
- -
- Nominal heater voltage
- 6.3 V
- Nominal heater current
- 600 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
- 2500 V
- Max screen voltage
- 500 V
Electrostatic-focus/electrostatic-deflection oscillograph CRT.
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
Characteristic
Phosphor
P1
Focusing Method
Electrostatic
Deflecting Method
Electrostatic
Other
Maximum Anode No. 2 Voltage
2750 V
Typical Anode No. 2 Voltage
2000 V
Data set 03
1965 Sylvania Electronic Tubes Vol3
Published operating points and test conditions from this source.
SECTION 1
Cathode Ray
Characteristic
Heater Voltage
6.3 V
Heater Current
600 mA
FocusingMethod
Electrostatic
DeflectionMethod
Electrostatic
Phosphor
P1 green, medium persistence
MinimumUsefulScreen
2.75 in
Other
Anode2VoltageMaximum
2750 V
Anode1FocusVoltageMaximum
1100 V
GridNegativeBiasMagnitudeMaximum
200 V
GridPositivePeakVoltageMaximum
2 V
PeakHeaterCathodeVoltageNegative
140 V
PeakVoltageAnode2ToDeflectionPlate
550 V
Anode2Voltage
2000 V
Anode1VoltageForFocus
320-600 V
GridVoltageForCutoff
-38 to -90 V
DeflectionFactorPlates1_2
100-136 V/in
DeflectionFactorPlates3_4
76-104 V/in
GridCircuitResistanceMaximum
1.5 Mohm
DeflectionCircuitResistanceMaximum
5 Mohm
Anode2PowerInputMaximum
6 W
Data set 04
1971 RCA HB3 Binder 1 of 7
Published operating points and test conditions from this source.
SECTION 1
Cathode Ray
Other
Heater voltage
6.3 V
Heater current
600 mA
Peak heater-cathode voltage, heater negative
125 V
Maximum deflecting electrode voltage
500 V
Focusing electrode voltage minimum
160 V
Typical
Focusing electrode voltage maximum
600 V
Typical
Construction
Focusing method
Electrostatic
Deflection method
Electrostatic
Phosphor
P1
Characteristic
Fluorescence
Green
Persistence
Medium
Capacitance
Grid #1 to all other electrodes capacitance
8 pF
Approximate
Application
Application
Oscillograph/cathode-ray display