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 ...
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September 1930 Radio-Craft[Table of Contents]
People old and young enjoy waxing nostalgic about and learning some of the history of early electronics. Radio-Craft was published from 1929 through 1953. All copyrights are hereby acknowledged. See all articles from Radio-Craft.
The following announcement was posted in the September 1930 edition of Radio-Craft magazine regarding Radio Data Service Sheets:
"We are pleased to announce that RADIO-CRAFT has taken over the subscription list of 'RADIO SERVICE,' formerly published in Dallas, Texas. All subscribers of record to RADIO SERVICE will receive RADIOCRAFT until the expiration of their subscriptions."
The following is the procedure to be followed for neutralizing the Fada "Model 265-A" battery set: the neutralizing condensers C7, CS, C9 are located from left to right in the set. Balance V3, V2, V1, in the same order, using a tube with an open filament. Adjust on a wavelength between 250 and 300 meters. To neutralize this receiver it is recommended that a type '01A tube be used in the detector position, V4; replacing, when balanced, with a type '00A tube. The compensating condenser C3A is located at the right of the third tuning condenser and is adjusted with a long screwdriver. In the Fada Model 475-A" receiver, C7 is accessible through the left hole (facing front of set) in terminal board in first can; and the second neutralizing condenser C8 through the right hole ...
Posted July 4, 2016
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.