Specialized - Cathode Ray ·CathodeRay
14KP4
Electronic Tubes Ltd. 14KP4 14-inch rectangular monochrome television CRT with magnetic focus and 70-degree deflection, P4 phosphor and ion trap.
- Sections
- 1
- Base
- -
- Socket code
- -
- Base pins
- 12
- Nominal heater
- 6.3 V / 300 mA
General specifications
Tube and section characteristics
Properties common to every published source and operating point.
Heater and base
- Base
- -
- Socket code
- -
- Base pins
- 12
- Nominal heater voltage
- 6.3 V
- Nominal heater current
- 300 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
- 10000 V
14KP4 television CRT: max anode2 HV 10000 V; max anode1 voltage 0.038×Va2 (e.g., 380 V when Va2=10000 V), so no fixed screen-voltage scalar promoted. Typical Va2 9000 V, Va1 250 V, grid drive for peak brightness 30 V nominal/40 V max, grid cutoff -40 V nominal/-60 V max, cathode current at peak brightness ~0.225 mA, focus field ~320 gauss. Heater-negative-to-cathode max 150 V. P4 phosphor, magnetic focus and 70° deflection, ion trap required. Grid-to-other capacitance 6 pF, cathode-to-other 5 pF, external coating-to-anode2 500–2000 pF.
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.