Electronics World articles Popular Electronics articles QST articles Radio & TV News articles Radio-Craft articles Radio-Electronics articles Short Wave Craft articles Wireless World articles Google Search of RF Cafe website Sitemap Electronics Equations Mathematics Equations Equations physics Manufacturers & distributors Engineer Jobs LinkedIn Crosswords Engineering Humor Kirt's Cogitations Engineering Event Calendar RF Engineering Quizzes USAF radar shop Notable Quotes App Notes Calculators Education Engineering Magazines Engineering magazine articles Engineering software Engineering smorgasbord RF Cafe Archives RF Cascade Workbook 2018 RF Stencils for Visio RF & EE Shapes for Word Advertising RF Cafe Homepage Sudoku puzzles Thank you for visiting RF Cafe!
Innovative Power Products Combiners / Dividers

Crossnumber Puzzle
August 1958 Popular Electronics

August 1958 Popular Electronics

August 1958 Popular Electronics Cover - RF CafeTable 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.

In many ways a crossnumber (aka cross number or cross figure) puzzle, which is an intersecting grid of numbers, is more challenging than a standard crossword puzzle, which is an intersecting grid of letters. John Comstock created a few of these crossnumber puzzles for Popular Electronics back in the early days of the magazine. If you have never tried creating a crossword puzzle, especially one that uses only technical terms and has many interconnected squares in the grid, then you cannot appreciate the frustration it can be. The nice thing about creating a crossnumber puzzle versus a crossword puzzle is that every number is a valid "word" and it is therefore never a problem to find a clue to go with it. For example, any random number can be the answer to a clue that expresses it as the series or parallel combination of resistances, capacitances, or inductances.

Here is another Crossnumber puzzle from the April 1959 issue of Popular Electronics

Crossnumber Puzzle

Crossnumber Puzzle, August 1958 Popular Electronics - RF CafeBy John A. Comstock

Like to work crossword puzzles? Then you have a treat awaiting you. Here is something new - a crossnumber puzzle. Instead of filling in words, you fill in numbers ... "electronic" numbers. Read the clues and see how well you can do.

Across

1. Upper frequency limit of broadcast band: kc.

4. Amount of wattage that equals 1 hp.

6. Number of degrees phase shift through capacitor.

7. One kilowatt: watts.

8. Impedance of common ribbon-type TV twin-lead.

11. Common record player speed: rpm.

12. Value of resistor color-coded brown, grey, violet, red.

13. TV line scanning frequency used in U. S.

15. TV field frequency.

16 Total resistance of two 5 -ohm resistors in series.

18 Last TV channel in u.h.f. group.

20 Foot -second velocity of sound waves in free space.

22 The year Edison demonstrated transverse of electrons between hot filament and cold plate in vacuum.

26 Amount of power that can be dissipated by two 15 -ohm, 50- watt resistors in series.

27 Ripple frequency output of single-phase full -wave rectifier: cps.

28 Hot resistance of 110 -volt, 50 -watt light bulb.

29 First TV channel in u.h.f. group.

30 Velocity of electromagnetic radiation in free space: mph.

 

Down

1 The year in which E. H. Armstrong first demonstrated his system of FM broadcasting.

2 Wavelength of 500 -kc. signal: meters.

3 Common commercial power line frequency in U. S.

5 Total capacitance of two 20 -pfd. capacitors in parallel.

7 The year Marconi sent wireless messages.

9 Intermediate frequency of some superhets.

10 International distress frequency: kc.

11 Intermediate frequency of many superheterodyne AM receivers.

14 In FM, frequency deviation that corresponds to 100% modulation: number of kc.

16 Upper limit of commercial FM broadcast band: mc.

17 Number of volts from 12 -volt battery.

19 Velocity of radio wave traveling in free space: meters.

21 The year E. H. Armstrong first demonstrated superheterodyne circuit.

23 Lower frequency limit of commercial FM band: mc.

24 Seventh harmonic of 360 kc.

25 Upper limit of TV v.h.f. Channel 13: mc.

27 Number of degrees phase shift through transformer.

 

<answer below>

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Crossnumber Solution, August 1958 Popular Electronics - RF Cafe

 

 

Posted October 3, 2019

RF Cascade Workbook 2018 by RF Cafe
Res-Net Microwave - RF Cafe
About RF Cafe
Kirt Blattenberger - RF Cafe Webmaster
Copyright: 1996 - 2024
Webmaster:
    Kirt Blattenberger,
    BSEE - KB3UON

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 Internet was still largely an unknown entity at the time and not much was available in the form of WYSIWYG ...

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

spacer