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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April 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.
Magazines usually provided at least a brief description on the circuit functionality for each of the radio models presented in schematic format. The April 1947 issue of Radio News published schematics and parts lists for six sets, including this for the Air King Model 4604D, but not a word about any of them accompanied it. The Air King Model 4604D thumbnail image is from Ron Potter's Attic website. These are posted as part of my ongoing effort to make the information available to those who repair and/or restore vintage vacuum tube radio sets. Services like SAMS Photofact®, which began operation in 1946, is still an excellent source of the most detailed data available.
Air King Model 4604D Schematic & Parts List
Posted March 31, 2017
Radio Service Data Sheets
These schematics, tuning instructions, and other data are reproduced from my collection of vintage radio and electronics magazines. As back in the era, similar schematic and service info was available for purchase from sources such as SAMS Photofacts, but these printings were a no-cost bonus for readers. There are 185 Radio Service Data Sheets as of April 12, 2017.