RF Cafe Software
About RF Cafe
1996 - 2022
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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January 1947 Radio News[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.
The first facsimile (fax) machines for home use were receive only, and got their data not from the telephone line but from a commercial broadcast radio receiver. Radio Corporation of America (RCA) and Finch Telecommunications were two of the earliest entrants into the realm. As opposed to modern digital fax machines, these analog systems used a scanning raster light beam and a photodetector to read and encode the original document image, and then a complimentary scanning method on the receiving end literally burned the image into special thermal paper. The Radio Historian website has an excellent article covering the history of radio facsimile, and how its being was motivated by the newspaper industry fretting over market share being lost to commercial AM and FM radio.
Available in table and console models, this modern facsimile recorder is combined with an FM-AM home receiver to provide complete home entertainment. The cabinets in which these models are housed are of specially selected woods.
The facsimile recorder is capable of scanning 28 square inches per minute at 105 lines per inch. The radio provides both standard and 88-108 mc. FM sound program reception.
This unit is being manufactured by Finch Telecommunications, Inc., 10 East 40th Street, New York 16, New York.
Posted September 1, 2016