|
Technical Specifications
21” PFT - A51MBG61X06(47.7)
 •
Electrical Data
• Optical Data
• Mechanical Data
• Ratings
• Examples of Use of Design Ranges
• Yoke Data
• Sagittal Heights and Mounting Lug Height
•
Electrical Data
| Electron Gun |
Unitized (one piece) triple aperture electrodes
Centre beam (Green), side beam (Blue, Red)
|
Heater Current at 6.3 volts
|
335 mA
|
| Focusing method
|
Electrostatic |
Focus Lens |
Multi-Element
|
| Convergence Method |
Magnetic |
Deflection Method |
Magnetic |
| Deflection Angles (Approx.):
Diagonal |
90 deg. |
Direct inter-electrode capacitance (approx.):
|
11 pF |
| All cathodes at all other electrode |
15 pF |
Grid No.3 to all other electrodes |
10 pF |
| External conductive
|
2000 max. pF, 1500 min. pF |
- |
- |
•
Optical Data
| Light Transmission at Centre(Approx.) |
55.0% |
Screen on Inner Surface of
Faceplate |
Aluminized, tricolour, black
Stripes
|
| Phosphor
|
P22-New Rare-Earth (Red) Sulphide(Blue
& Green) Type |
Arrangement stripe
|
Vertical Line Trios |
| Spacing between
Centers of adjacent
Phosphor trios (Approx.)
|
0.70 mm
|
|
|
Note: * Spacing
between centres of adjacent stripe trios (Approx.)
• Mechanical Data
| Overall Length |
423.43 6.5 mm
|
Screen : Diagonal |
506.00 mm |
| Screen : Horizontal
|
406.4 mm |
Screen: Vertical axis |
303.30 mm |
| Screen Area |
min 1229 sq. cm
|
Base Designation |
B 10 - 277 |
| Bulb Contact Desgination |
Recessed Small Cavity
|
Bulb: Funnel |
EIAJ J540F1 |
| Bulb : Panel
|
Cap( EIA no. 13N )
|
Pin Position Alignment |
Pin No.10 aligns approx.with Anode
contact |
| Implosion Protection |
EIAJ J540AU11
|
Weight |
15.7 Kg |
Note: ** Minimum
Useful Screen Dimension (Projected)
• Ratings
Unless otherwise specified, values for each Gun and voltage values are positive with respect to grid no. 1
| Anode Voltage |
30 KV max
|
Total Anode Current, Long-term
Average |
1100 max. micronA |
| Grid-No.3&5 (Focusing Electrode)
Voltage |
12 KV max
|
Peak Grid No.2 Voltage, Including
Video Signal Voltage |
1,000 max. Volts |
| CV: Positive Bias Value |
400 max. Volts |
CV: Positive operating cut
off value |
1500 V max
|
| CV: Negative Bias Value |
0 max. Volts |
CV: Negative PeakValue |
200 V max
|
| Heater Voltage (AC rms
DC) |
6.6 V max / 5.7 V min
|
Surge of Heater Voltage (within
100 msec) |
2 V max
|
| Peak Heater Cathode Voltage
|
|
|
|
| Heater negative with respect
to cathode
|
450 V Volts |
Heater positive with respect
to cathode
|
200 max Volts
|
Note: CV =
Cathode Voltage PHCV = Peak Heater-Cathode Voltage
• Examples of Use
of Design Ranges
Unless otherwise specified, voltage values are for
each Gun and are positive with respect to Grid No. 1
| Anode Voltage |
27.5 KV
|
| Grid No. 3 Voltage (Focusing voltage)
|
27% of anode voltage
|
| Grid No. 2 cathode voltage for visual extinction of focused spot
|
460 to 820 Volts |
| Heater Voltage : Under operating conditions
|
6.3 Vrms |
•
Yoke Data
| Electrical – Horizontal Deflection Coil – Inductance
|
1.98 mh ± 10%
|
| Electrical – Horizontal Deflection Coil – Resistance
|
3.4 ohm ± 10%
|
| Electrical – Vertical Deflection Coil – Inductance
|
13.1 mh ± 10%
|
| Electrical – Vertical Deflection Coil – Resistance
|
7.8 ohm ± 10%
|
| Max Ratings : Absolute max. Values – Peak Pulse Voltage across Horizontal Coils at 15,750 Hz for a pulse of 9µ sec
|
14,000 max.V |
| Peak to Peak Deflection Current at 27.5 KV, Edge to Edge Scan, Typical
|
1.30 A
|
•
Sagittal Heights and Mounting Lug Height
One of the four Mounting Lugs may deviate (2.0 mm max.) from the place
of the other three within the 2.0 mm tolerance. This deviation is
incorporated in the 2.0 mm tolerance. |
