Custom Search
Over 10000 Pages Indexed
Your Host
Click here to read about RF CafeKirt
Blattenberger

... single-
handedly
redefining
what an
engineering website
should be.

View the YouTube RF Cafe Intro Video Carpe Diem!
(Seize the Day!)

5CCG (5th MOB):
My USAF radar shop

Hobby & Fun

Airplanes and Rockets:
My personal hobby website

Equine Kingdom:
My daughter Sally's horse
riding business website -
lots of info

•−•  ••−•    −•−•  •−  ••−•  •
RF Cafe Morse Code >Hear It<

Job Board

About RF Cafe©

RF Cafe E-Mail

Tube Testers and Electron Tube Equipment
RF Cafe Quiz #56

| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 |
| 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 |
| 29 | 30 | 31 | 32 | 33 | 34 | 35 | 36 | 37 | 38 | 39 | 40 | 41 |
| 42 | 43 | 44 | 45 | 46 | 47 | 48 | 49 | 50 | 51 | 52 | 53 | 54 |
| 55 | 56 | 57 | 58 | 59 | 60 | 61 | 62 |

All RF Cafe quizzes would make perfect fodder for employment interviews for technicians or engineers - particularly those who are fresh out of school or are relatively new to the work world. Come to think of it, they would make equally excellent study material for the same persons who are going to be interviewed for a job.

Some of these books used in quizzes are available as prizes in the monthly RF Cafe Giveaway.

Note: Many answers contain passages quoted from the text.


Make Your Own Tube Testers and Electron Tube Equipment - RF Cafe

This quiz is based on the information presented in Make Your Own Tube Testers and Electron Tube Equipment, by Gary Steinbaugh.

 

With more than 30 years of RF engineering experience and Ham radio involvement, Gary has a very broad and deep proficiency in electronics. His new book, Make Your Own Tube Testers and Electron Tube Equipment, is a great assimilation of his personal knowledge and includes some of the highest quality line drawings and photographs of any technical book I have ever seen - and I've seen a lot of them! The preface section is also unique in nature, followed by a short history of and basic circuit design principles for vacuum tubes. Gary also conceived of and built a 3-dimensional physical model of the plate, transfer, and constant current characteristic curves for a typical vacuum tube (6SN7); you've never seen this before. The homebrew tube tester and power supply projects described in the text and built by Gary are exceptional examples of craftsmanship.

 

 

1.  Which of the following are negative properties of vacuum tubes?

a)  Heavy and bulky
b)  Electrically fragile (intolerant of overloads and spikes)
c)  Low power efficiency
d)  Capacitance varies with applied voltage




2.  Which of the following are negative properties of transistors?

a)  Mechanically fragile (impact and vibration)
b)  High output impedance requiring matching transformers
c)  Low impedance requiring high-value capacitors for coupling
d)  Tend toward high distortion




Electrical Indicator U.S. patent #307,031 - RF Cafe3.  Who received the first U.S. patent for an electronic device?

a)  Nikola Tesla
b)  Lee de Forest
c)  Thomas Edison
d)  George Westinghouse




4.  What is a "bogey" vacuum tube?

a)  A normal, or "typical," tube statistically centered in the distribution
     of datasheet specifications.
b)  A bad tube
c)  A tube that measured one above par
d)  A tube used for destructive testing




5.  What is the most common type of gradual failure in a vacuum tube?

a)  Glass envelope breakage
b)  Filament breakage
c)  Pin bending
d)  Low cathode emission (aka cathode depletion)




6.  What are the two basic types of serviceman's vacuum tube testers?

a)  High voltage and low voltage
b)  Cathode emission measurement only, and both cathode emission and amplification measurements
c)  Standard tube size and peanut tube size
d)  Hand carried and backpack carried




7.  What is a typical vacuum tube filament temperature?

a)  400° C  (752° F)
b)  800° C  (1,472° F)
c)  1,200° C  (2,192° F)
d)  1,600° C  (2,912° F)




8.  What is a sesquimultiplier?

a)  A sesquine duplicator
b)  An ancient form of the abacus
c)  A vacuum tube circuit that performs numerical multiplication
d)  A circuit that multiplies voltage by 1.5




9.  Why are "operational amplifiers" (aka "opamps") named thus?

a)  They were originally part of circuits for performing mathematical operations
b)  They were developed for use in medical equipment
c)  They were first used in audio equipment for opera houses
d)  They were named after the Greek philosopher Operatus Amplifcatius




10.  What is the word used to the measure of how significant the space charge effect is on the beam's motion ?

a)  Perversion
b)  Purturbance
c)  Perveance
d)  Purveyance


Need some help? Click here for the answers and explanations.






Posted  January 1, 2014
A Disruptive Web Presence

Custom Search
Over 10,000 pages indexed! (none duped or pirated)

Read About RF Cafe
Webmaster: Kirt Blattenberger
    KB3UON

RF Cafe Software

RF Cascade Workbook
RF Cascade Workbook is a very extensive system cascaded component Excel workbook that includes the standard Gain, NF, IP2, IP3, Psat calculations, input & output VSWR, noise BW, min/max tolerance, DC power cauculations, graphing of all RF parameters, and has a graphical block diagram tool. An extensive User's Guide is also included. - Only $35.
RF system analysis including
frequency conversion & filters

RF & EE Symbols Word
RF Stencils for Visio

Product & Service Directory
Personally Selected Manufacturers
RF Cafe T-Shirts & Mugs

RF Cafe Software

Calculator Workbook
RF Workbench
Smith Chart™ for Visio
Smith Chart™ for Excel