Chapter 4: Picture Tubes – Grob TV

Print Friendly, PDF & Email
(Last Updated On: January 10, 2020)

Chapter 4: Picture Tubes

This is the Chapter 4: Picture Tubes end chapter exercise in Basic Television – Grob TV as one of the Electronics Engineering topic. In Preparation for the ECE Board Exam make sure to expose yourself and familiarize in each and every questions compiled here taken from various sources including but not limited to past Board Exam Questions in Electronics Engineering field, Electronics Books, Journals and other Electronics References.

Start Grob TV End Chapter Exercise 04

Answers are Underlined

Chapter 4

Picture Tubes

4-1

  • a. What is the diagonal screen size for 19CP4 picture tube? 19
  • b. To what deflection angle does a maximum deflection angle of 45° either side of center correspond? 90°
  • c. The usual heater voltage for picture tubes is 6.3 V.

4-2

  • a. Typical anode voltage for a 25-in color picture tube is 30 kV.
  • b. Typical anode capacitance is 2000 pF.

4-3

  • a. The phosphor numbers for monochrome is P4 and for color picture tubes is P22.
  • b. Aluminized tubes do not need an ion-trap.
  • c. What is the color of the P1 phosphor? Green

4-4

  • a. Control Grid is the most negative electron gun.
  • b. Ultor or Anode is the most positive electron gun.
  • c. Most of the electrons in the beam flow out of the anode terminal.

4-5

  • a. The crossover point for focusing is formed by the first electron lens.
  • b. A G3 voltage of 200V is used for low-voltage focus method.
  • c. For most color picture tubes, the G3 focus voltage is an adjustable value of several kilovolts.

4-6

  • a. The small magnets embedded in the yoke housing correct for pincushion distortion.
  • b. The coils above and below the electron are for H scanning.
  • c. Two permanent-magnet rigs just behind the yoke are used for centering the beam in monochrome receivers.
  • d. Neck shadow result when the deflection yoke is too far back.

4-7

  • a. Separation of the beams for the red, green and blue colors is accomplished by the shadow mask.
  • b. In-line guns are easier than the delta guns in making the convergence adjustments.

4-8

  • a. A shadow mask has about 300,000 holes.
  • b. The holes in the shadow mask is conical in shape to prevent secondary emission.

4-9

  • a. Ambient room lighting makes black on the screen appear lighter.
  • b. Opaque phosphor masking improves contrast by making black appear darker.

4-10

  • a. A TV projection picture shows less detail than the image on a direct-view picture tube.
  • b. The typical anode voltage for projection tubes is 30 to 80 kV.

4-11

  • a. When a picture tube is being discharged, the ground end of the clip lead should be connected first.
  • b. Hold-down circuits limit the amount of color saturation.

4-12

  • a. Weak emission from the cathode of the electron gun causes saturation limiting, with the picture appearing silvery gray where it should appear white.
  • b. No picture, with a bright, blank raster and no control of brightness, may indicate a short circuit between the cathode and the control grid in the picture tube.
  • c. A yellowish brown monochrome picture slowly balancing to a neutral gray scale indicates weak emission in the blue gun.

Complete List of Basic Television – Grob TV Chapter Exercises

SEE ALSO: MCQ in Basic Television – Grob TV

DOWNLOAD PDF / PRINT
Print Friendly, PDF & Email
Show Simple Act of Caring!

Please consider subscribing to our YouTube Channel for engineering video tutorials. You can also find us on Twitter and Facebook. Lastly, Our app is now available on Google Play, Pinoybix Elex

Add Comment

© 2014 PinoyBIX Engineering. © 2019 All Rights Reserved | How to Donate? | Follow me on Blogarama DMCA.com Protection Status
Do NOT follow this link or you will be banned from the site!

Math Solution

Advanced Math problem age work mixture digit motion Analytic Geometry 01 problem Analytic Geometry 02 problem clock variation progression misc Combination problem Differential Calculus 01 Problem Differential Calculus 02 Problem Differential Equations Problem Fundamentals in Algebra Fundamentals in Algebra Problem Integral Calculus problem Permutation problem Plane Geometry problem Plane Trigonometry problem Probability problem quadratic equation binomial theorem logarithms Solid Geometry problem Spherical Trigonometry problem System of Numbers Problem Venn Diagram Problem

Questions and Answers in Mathematics

video

Pre-board in Electronics Engineering

Pre-board in Electronics Engineering - Answers

Questions and Answers

Basic Television - Grob TV Boylestad Questions and Answers Computer Principles Electrical Circuit Electricity and Magnetism Fundamentals Electronic Circuits Floyd Questions and Answers Floyd Self-test Grob Questions and Answers Industrial Electronics Principles and Applications Microelectronics Power Generators / Sources / Principles and Applications Solid State Devices Tests and Measurements Vacuum Tubes

Pre-board in Communications Engineering

Pre-board in Communications Engineering - Answers

Questions and Answers

Acoustics Antennas Blake Questions and Answers Broadcasting and Cable TV System Digital Communication Networks Forouzan Kennedy Questions and Answers Microwave Communications Miscellaneous Questions in Communications Modulation Navigational Aids and Radar Systems Noise Optical Fiber Communications Radiation and Wave Propagation Satellite Communications Transmission Fundamentals Wire and Wireless Communications

GEAS Solution

Dynamics problem Economics problem Physics problem Statics problem Strength problem Thermodynamics problem

Pre-board in GEAS

Questions and Answers in GEAS

Engineering Economics Engineering Laws and Ethics Engineering Management Engineering Materials Engineering Mechanics General Chemistry Physics Strength of Materials Thermodynamics
Online Tool: Electrical Charge Conversions
Online Tool: Electrical Charge Conversions
Online Tool: Color Code Conversions
Online Tool: Color Code Conversions
Online Tool: Weight Measurement Conversions
Online Tool: Weight Measurement Conversions
Online Tool: Temperature Measurement Conversions
Online Tool: Temperature Measurement Conversions
Consider Simple Act of Caring!: LIKE MY FB PAGE

Our app is now available on Google Play, Pinoybix Elex

Get it on Google Play