Data set 01
1938 Raytheon
Published operating points and test conditions from this source.
SECTION 1
Cathode Ray
Characteristics
Heater or filament voltage
6.3 V
Published nominal value
Heater or filament current
600 mA
Published nominal value
Specialized - Cathode Ray ·CathodeRay
3UP7
Three-inch cathode-ray tube for oscilloscope and instrument display service, using electrostatic focusing and electrostatic deflection. Its P7 screen designation identifies the phosphor variant within this compact oscillographic family.
Directly heatedCold cathodeCommon cathodeDissimilarSpecialized
- Sections
- 1
- Base
- -
- Socket code
- -
- Base pins
- -
- Nominal heater
- 6.3 V / 600 mA
Description
Printed companion 3UP-series cathode-ray designation on the same oscilloscope CRT source sheet.
General specifications
Tube and section characteristics
Properties common to every published source and operating point.
Heater and base
- Base
- -
- Socket code
- -
- 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
- 4000 V
Published ratings and characteristics promoted where clearly stated; identical repeated sections compressed when applicable.
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.