1996 - 2016
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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May 1933 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.
R.C.A. Victor R·27 Universal: This small radio set carries the following specifications: Line voltage rating, 105 to 120 V., D.C., or 25 to 133 cycles A.C. Power consumption, 40 W. A feature of this set is the extremely wide tuning range of 540 to 1,700 kc. The left-hand knob is a combined volume control and power- switch; the station selector is at the right. If the set does not work within a minute, reverse the position of the line plug in the socket. This particular type of set should be so positioned as to permit full ventilation at all times.
Philco 53 Universal Compact: To obtain maximum sensitivity through the use of the 30 ft. of antenna wire furnished with the set, it will be necessary to adjust the antenna compensating condenser, the L.F. compensating condenser and the sensitivity condenser in the following manner; unroll the 30 ft. of antenna wire to its full length (do not connect it to another aerial or ground while the following adjustments are being made).
Posted May 25, 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 152 Radio Service Data Sheets as of November 14, 2016.