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About RF Cafe

Kirt Blattenberger - RF Cafe WebmasterCopyright
1996 - 2016
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.

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World Distance Chart No. 1
July 1934 Radio News and The Short-Wave

July 1934 Radio News & Short-Wave

July 1934 Radio News and the Short-Wave Cover - RF Cafe[Table of Contents]

These articles are scanned and OCRed from old editions of the Radio & Television News magazine. Here is a list of the Radio & Television News articles I have already posted. All copyrights are hereby acknowledged.

Before the Internet, cellphone apps, and personal computers, many calculations began with a lookup table, chart, or nomograph. In the case of long distance radio operators seeking distance and direction information for pointing antennas, it took a map like this one published by Radio News & Short-Wave magazine in 1934. Distance are all relative to New York (NYers have always considered themselves the center of the universe Groucho Marx Smiley - RF Cafe), so operators in other locales need to compensate. Here is one example of many online great circle calculators that allow you to enter two sets of longitude and latitude. Unfortunately, I do not have the next month's edition for be able to post the second chart mentioned.
World Distance Chart No. 1
HOW TO USE THE WORLD DISTANCE CHART

To use the map first find the distance in inches between New York and the desired point, multiply this by the miles per inch shown on the scale on the chart and the answer will be a close approximation to the air line distance between the two points. This chart is reproduced from the March, 1933, issue of RADIO NEWS for the benefit of our new short-wave readers. Chart Number Two will be published next month

World Distance Chart No. 1 - RF Cafe

World Distance Chart No. 1



Posted  July 29, 2013