Welcome to the RF Cafe Website

Search:                 | Sitemap

About RF Cafe | Homepage Archive

Kirt Blattenberger (KB3UON)

Advertise on RF Cafe (Advertisers)

RF Cafe Live Blog | Forums

Copyright 1999-2030

Electronics & RF | Mathematics

Physics & Mechanics | Quotes

Crosswords | Humor | Podcasts

Quizzes | Cogitations | Articles

Parts & Services | Videos

Radar Handbook | Cool Things

Selected Vintage Magazine Articles

Electronics World | Radio-Electronics | OFA

Radio & TV News | QST | Popular Science

Popular Mechanics | Radio-Craft | Electronics

Popular Electronics  | Mechanix Illustrated

Short Wave Craft | Saturday Evening Post

RF & Electronics Symbols for Visio & Office

RF & Electronics Stencils for Visio

RF Cascade Workbook | Espresso Workbook

RF Cascade Workbook 2018 by RF Cafe

PCB Directory (Manufacturers)
Windfreak Technologies Frequency Synthesizers - RF Cafe

Semiconductor Quiz
February 1967 Popular Electronics

February 1967 Popular Electronics

February 1967 Popular Electronics Cover - RF Cafe  Table of Contents

Wax nostalgic about and learn from the history of early electronics. See articles from Popular Electronics, published October 1954 - April 1985. All copyrights are hereby acknowledged.

Out of the nearly half a hundred quizzes I have posted from vintage Popular Electronics magazines, this Semiconductor Quiz that appeared in a 1967 issue is the first I can remember that was not created by Robert P. Balin. A fellow named Warren Todd made it. If you are younger than maybe 50 years old, symbols B and I might stump you, but the rest are still pretty common. Some of the labels (names) presented in the quiz are a little outdated so I have identified the abbreviations for you. That will make things much easier. For example, SBS is a silicon bidirectional switch. Bonne chance.

Semiconductor Quiz

By Warren Todd

With newer and more efficient semiconductor devices constantly being developed, electronic technicians and engineers alike are finding it increasingly difficult to keep up with the symbols representing these devices. If you can correctly identify all of the symbols (A-J) below by name (1-10), you're on top of the situation. Even if you can identify only eight, you deserve an "A" for being up-to-date with solid state.

1 UJT __  (unijunction transistor)

2 SUS __  (silicon unidirectional switch)

3 SBS __  (silicon bidirectional switch)

4 DIAC __  (diode, a.c. semiconductor)

5 TRIAC __  (bidirectional switch for a.c.)

6 SCR __  (silicon controlled rectifier)

7 LASCR __  (light-activated silicon-controlled rectifier)

8 JFET __  (junction field-effect transistor)

9 IGFET __  (insulated-gate field-effect transistor)

10 ZENER __  (voltage regulator diode)


See answers below.


Quizzes from vintage electronics magazines such as Popular Electronics, Electronics-World, QST, 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









Quiz Answers

1 )   J - UJT (unijunction transistor)

2 )   B - SUS (silicon unidirectional switch)

3 )   I - SBS (silicon bidirectional switch)

4 )   D - DIAC (diode, a.c. semiconductor)

5 )   H - TRIAC (bidirectional switch for a.c.)

6 )   C - SCR (silicon controlled rectifier)

7 )   A - LASCR (light-activated silicon-controlled rectifier)

8 )   E - JFET (junction field-effect transistor)

9 )   F - IGFET (insulated-gate field-effect transistor)

10)   G - ZENER (voltage regulator diode)



Posted October 12, 2018

Anritsu Test Equipment - RF Cafe

About RF Cafe

Kirt Blattenberger - RF Cafe Webmaster

1996 - 2024


Kirt Blattenberger,


RF Cafe began life in 1996 as "RF Tools" in an AOL screen name web space totaling 2 MB. Its primary purpose was to provide me with ready access to commonly needed formulas and reference material while performing my work as an RF system and circuit design engineer. The World Wide Web (Internet) was largely an unknown entity at the time and bandwidth was a scarce commodity. Dial-up modems blazed along at 14.4 kbps while tying up your telephone line, and a nice lady's voice announced "You've Got Mail" when a new message arrived...

Copyright  1996 - 2026

All trademarks, copyrights, patents, and other rights of ownership to images and text used on the RF Cafe website are hereby acknowledged.

My Hobby Website: AirplanesAndRockets.com | My Daughter's Website: EquineKingdom

Innovative Power Products Passive RF Products - RF Cafe

Espresso Engineering Workbook - RF Cafe