Specialized - Cathode Ray ·CathodeRay
12HP7
12HP7 12-inch P7 phosphor cathode-ray tube with electrostatic focusing and two-axis electrostatic deflection, 6.3 V 0.6 A heater.
- Sections
- 1
- Base
- -
- Socket code
- -
- Base pins
- 11
- Nominal heater
- 6.3 V / 600 mA
General specifications
Tube and section characteristics
Properties common to every published source and operating point.
Heater and base
- Base
- -
- Socket code
- -
- Base pins
- 11
- 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
- Max plate voltage
- 5500 V
12HP7 electrostatic focus and deflection CRT. Max anode2 HV 5500 V, anode1 focus 1500 V, control grid never positive, peak anode2-to-deflection-plate voltage <=1000 V. Grid circuit resistance max 1.5 MΩ, deflection supply impedance at heater frequency max 1 MΩ. Typical anode2 5000 V, anode1 focus 1150 V (+25%/-30%), grid cutoff -90±50 V. Deflection factors D1-D2 19 V/(inch kV) ±20%, D3-D4 25 V/(inch kV) ±20%. P7 phosphor, maximum grid-to-others capacitance 12 pF, deflection pair capacitance 3 pF each, deflection-to-others 11 pF max. RMA release #349 (1943).
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.