Specialized - Cathode Ray ·CathodeRay
12DP7
12DP7 12-inch P7 phosphor cathode-ray tube with magnetic focusing and deflection, 55-degree maximum deflection angle and 6.3 V 0.6 A heater.
- Sections
- 1
- Base
- 5AN
- Socket code
- -
- Base pins
- 8
- 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
- 5AN
- Socket code
- -
- Base pins
- 8
- Nominal heater voltage
- 6.3 V
- Nominal heater current
- 600 mA
- Parallel heater voltage
- -
- Parallel heater current
- -
- Series capable
- No
5AN - 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
- 7700 V
- Max screen voltage
- 330 V
12DP7 RMA 1942 CRT. Maximum anode 7700 V, grid2 accelerating electrode 330 V; grid1 never positive. Heater-negative-to-cathode DC potential maximum 125 V, grid1 circuit resistance max 1.5 MΩ. Typical anode 4000 or 7000 V, grid2 250 V, grid1 visual cutoff -50 V ±50%; recommended Va >=4000 V. Magnetic focus and deflection, max solid deflection angle 55°, P7 phosphor, 10-inch minimum useful screen diameter. Direct capacitances grid1 to others ~10 pF, cathode to others ~8.5 pF. Large anode side cap.
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.