Specialized - Cathode Ray ·CathodeRay
17ASP4
Electronic Tubes Ltd. 17ASP4 17-inch rectangular monochrome television CRT with magnetic focus and 70-degree deflection, ion trap, white screen and 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
- -
- Parallel heater current
- -
- Series capable
- No
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
- 14000 V
17ASP4 CRT: maximum anode2 HV 14000 V; anode1 focusing voltage range 200–410 V (not screen grid), grid minimum -1 V, grid visual-cutoff limit -0.24×Va1, peak heater-negative-to-cathode max 150 V, grid resistor max 1 MΩ. Typical anode2 12000 V, anode1 250 V, grid drive for peak brightness 30 V, peak cathode current 220 µA. White screen, magnetic focus and deflection ~70°, ion trap required. Capacitances grid-to-all 6.5 pF, cathode-to-all 5.5 pF, anode2-to-external coating 1100 pF. Heater switching surge <=8.5 V.
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.