Diagram Quiz
August 1966 Popular Electronics

August 1966 Popular Electronics 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.

Fridays are good days for Carl and Jerry stories, Mac's Electronics Service Shop sagas, Hobnobbing with Harbaugh, electronics-themed comics, electronics quizzes, and other forms of nerd entertainment. Here is another of Robert P. Balin's great challenges titled, "Diagram Quiz." Most RF Cafe visitors will easily identify eight or nine of the ten diagrams. Relatively few will be familiar with the Rieke diagram (hint: power amplifier designers will know about it). The Biasing diagram is a bit misnamed IMHO, and could cause confusion. Bon chance.

Electronics Diagram Quiz

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.

Diagram Quiz Answers

1 - E   A Basing diagram (also called outline drawing) shows the location of, and identifies the pins of, a vacuum tube or solid-state device.

2 - G   A Chromaticity diagram displays the various spectral colors that can be reproduced in our color TV system by using the standard wavelengths of red, green, and blue primaries. From it we can see the range of hues and saturation of the colors with respect to white.

3 - I   A Circle diagram is used to determine the input impedance of a transmission line, in terms of its electrical length and load impedance. The solution is displayed graphically.

4 - F   A Directivity diagram (also called polar diagram) is a plot of the directional characteristics which enable an antenna to radiate or receive more energy in some directions than in others.

5 - D   An Energy Level diagram shows the increases and decreases of electric power as current intensities rise and fall along a channel of signal communications.

6 - J   A Logic Flow diagram provides a graphical representation of a computer program or routine at various stages during an operation.

7 - A   A Nyquist diagram is used to evaluate the stability of feedback systems over a wide range of operating frequencies.

8 - B   A Rieke diagram is used to evaluate the performance of microwave oscillators such as klystrons and magnetrons. Contours of constant power output and frequency are plotted on a diagram in which the circles represent the SWR, and the axial lines the phase angle of the load.

9 - H   A Venn diagram shows the relationship between two independent variables, A and B. The diagram is of assistance in visualizing logic operations.

10 - C A Winding diagram for an alternating current machine shows the phase and polar relationships of the windings of a multiphase generator, and provides a means of connecting several groups together to obtain a desired output.

Posted May 4, 2018