Specialized - Cathode Ray ·CathodeRay
12XP4
12-inch monochrome television cathode-ray picture tube with magnetic focus, magnetic deflection and ion trap; 6.3 V, 0.3 A heater.
- Sections
- 1
- Base
- B12A
- 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
- B12A
- Socket code
- -
- Base pins
- 12
- Nominal heater voltage
- 6.3 V
- Nominal heater current
- 300 mA
- Parallel heater voltage
- 6.3 V
- Parallel heater current
- 300 mA
- Series capable
- Yes
B12A - 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
- 9000 V
CRT second anode (a2) maximum 9 kV; typical 8 kV. First anode (a1) typical 250 V. 6 pF grid-to-all, 5 pF cathode-to-all, approximately 2000 pF second anode-to-external coating. Other limits in source have OCR ambiguity; do not interpret a2 voltage as ordinary amplifier plate rating.
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.