Search RFCafe.com                           
      More Than 17,000 Unique Pages
Please support me by ADVERTISING!
Serving a Pleasant Blend of Yesterday, Today, and Tomorrow™ Please Support My Advertisers!
   Formulas & Data
Electronics | RF
Mathematics
Mechanics | Physics
     AI-Generated
     Technical Data
Pioneers | Society
Companies | Parts
Principles | Assns


 About | Sitemap
Homepage Archive
        Resources
Articles, Forums Calculators, Radar
Magazines, Museum
Radio Service Data
Software, Videos
     Entertainment
Crosswords, Humor Cogitations, Podcast
Quotes, Quizzes
   Parts & Services
1000s of Listings
 Vintage Magazines
Electronics World
Popular Electronics
Radio & TV News
QST | Pop Science
Popular Mechanics
Radio-Craft
Radio-Electronics
Short Wave Craft
Electronics | OFA
Saturday Eve Post

Software: RF Cascade Workbook
RF Stencils Visio | RF Symbols Visio
RF Symbols Office | Cafe Press
Espresso Engineering Workbook

Aegis Power  |  Alliance Test
Centric RF  |  Empower RF
ISOTEC  |  Reactel  |  RFCT
San Fran Circuits

RF Electronics Shapes, Stencils for Office, Visio by RF Cafe

KR Electronics (RF Filters) - RF Cafe

Anatech Electronics RF Microwave Filters - RF Cafe

Please Support RF Cafe by purchasing my  ridiculously low-priced products, all of which I created.

RF Cascade Workbook for Excel

RF & Electronics Symbols for Visio

RF & Electronics Symbols for Office

RF & Electronics Stencils for Visio

RF Workbench

T-Shirts, Mugs, Cups, Ball Caps, Mouse Pads

These Are Available for Free

Espresso Engineering Workbook™

Smith Chart™ for Excel

Amplifier Solutions Corporation (ASC) - RF Cafe

Tube Testers and Electron Tube Equipment
RF Cafe Quiz #56

RF Engineering Quizzes - RF CafeAll RF Cafe Quizzes make great 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. Bonne chance, Viel Glück, がんばろう, buena suerte, удачи, in bocca al lupo, 행운을 빕니다, ádh mór, בהצלחה, lykke til, 祝你好運. Well, you know what I mean: Good luck!

Click here for the complete list of RF Cafe Quizzes.

Note: Some material based on books have quoted passages.

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.


Quizzes from vintage electronics magazines such as Popular Electronics, Electronics-World, QST, Radio-Electronics, and Radio News were published over the years - some really simple and others not so simple. Robert P. Balin created most of the quizzes for Popular Electronics. This is a listing of all I have posted thus far.

RF Cafe Quizzes

Vintage Electronics Magazine Quizzes

Vintage Electronics Magazine Quizzes

Vintage Electronics Magazine Quizzes

 

 

Posted  January 1, 2014

Amplifier Solutions Corporation (ASC) - RF Cafe
Cafe Press

Axiom Test Equipment - RF Cafe

Innovative Power Products (IPP) Directional Couplers