RF Cafe Software
About RF Cafe
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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November 1937 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.
It was a fairly common practice in the early days of radio to run full-page advertisements in trade magazine that looked like the front page of a newspaper. This one by Radio Corporation of America (RCA) is a good example. The ad appeared in a 1937 edition of Radio-Craft, pitching primarily its new radio models with improved shortwave reception and band extensions. Also promoted ACR-111 amateur radio receiver. Interestingly, there is mention of what was the equivalent of an 800 toll-free number with a centralized call center for RCA customers to call for service. Their call would then be routed to a local facility. I'm guessing the call center was located in America and not in the Philippines or Bangladesh. BTW, why do we refer to nationals of the Philippines as Filipinos and not Philippinos? < see explanation here>
RCA All the Way
RCA Radio News
Everything in Radio-Microphone to Loudspeaker
RCA Manufacturing Company, Inc. Camden, New Jersey
A Service of the Radio Corporation of America
To the consumer, RCA means high quality performance at low cost ... To the radio man, RCA means easier selling, higher profits
A Short Wave Sensation
RCA Victor Overseas Dial Brings New Ease to Tuning of Short Wave Stations
Thousands Laud New Extra-Value Features of 1938 RCA Victor Radios
"Push A Button - There's Your Station" With Electric Tuning and Armchair Control
Now it's as easy to tune for short-wave stations as it is to tune for domestic ones! That's why short-wave fans are acclaiming the new RCA Victor Overseas Dial.
This revolutionary tuning device carries names of foreign stations on dial scales. Each of the band scales are 9 1/2" wide. Compare this with the usual 1/4" or narrower segments on most short-wave dials and you will see for yourself that short-wave stations are spread 50 times wider apart on the Overseas Dial. As a result, tuning for foreign stations is much easier than ever before. Large, easy-to-read dials are one of the important features of all new RCA Victor radios. Another RCA Victor tuning sensation in the new sets is Electric Tuning. Push a button - there's your station. That's all you have to do to get anyone of your eight favorite stations. You can have Electric Tuning with Armchair Control - an ingenious device which permits push-button tuning from across the room, another room, or any place else that's convenient.
In all, the 1938 RCA Victor line provides 55 great features, including Sonic-Arc Magic Voice, Magic Brain, Magic Eye, RCA Metal Tubes. Ask your local RCA Victor dealer to tell you about all the features. Buy your radio the wise way - on proof. There are 39 new models with prices to suit you. All RCA Victor radios are available on C. I. T. easy payment terms.
RCA Victor Model 813K featuring new Overseas Dial and Electric Tuning, 13 tubes, new Sonic-Arc Magic Voice, Magic Brain, Magic Eye, RCA Metal Tubes. Covers standard broadcast band and 49, 31, 25 and 19 meter bands of international entertainment. Armchair Control available at slight extra cost. Yours for $15 down.
Amateurs Get Instrument They've Always Wanted - At Low Price
New, 16-tube communication receiver provides plus performance at low price.
Its performance shouts "custom-built" - yet you can afford its price! That's the ACR-111, RCA's new communication receiver. This exceptional instrument has every desirable feature for communication service. Meets every requirement of modern high frequency communication - takes the most trying conditions in its stride.
The ACR-111 provides exceptional sensitivity, limited only by the tube noises common to all signal-input tube circuits. An efficient antenna coupling system is provided to permit the use of receiver's inherent sensitivity.
Selectivity is the maximum consistent with requirements of communication service. Unusual frequency stability and reliability have been achieved by careful electrical circuit design and the use of rugged circuit components.
Among its outstanding features are the constant-percentage electrical band-spread system, noise suppressor, 2 r. f. and i. f. stages.
Cabinet, or rack mounting, models for only $189.50 at the factory. Free descriptive folder available without cost, from your supplier.
Note These Features:
16 Tubes (14 All-Metal, 2 Glass) ... 540-32,000 kcs. Continuous ... 2 Tuned R-F Stages, 2 I-F Stages, ... Constant-Percentage Electrical Band-Spread ... Noise Suppressor ... Noise Limiter ... Quartz Crystal I-F Filter ... Electron-Ray Tuning Tube and Signal-Strength Indicator ... 3 Magnetite Core I-F Transformers ... Delayed and Amplified A.V.C. ... Unique Stand-by Pilot Light ... All Controls on Front Panel ... Separate Dust-proof 8-inch Dynamic Speaker ... Band Change by Self-cleaning Switch ... Handsome, Rugged Metal Cabinet ... Individual Dial for Each Range ... Dial Calibrated in Megacycles ... Separate Calibration-Spread Dial ... High Signal-to-Noise and Image Ratio ... Large Tuning Knobs with Crank Handles.
Free Central Phone Number Plan Uncovers RCA Check-Up Prospects
RCA Pays All Costs of Most Spectacular Check-Up Promotion Ever Offered Radio Service Dealers
RCA has introduced a new way of making the famous Check-Up Plan produce extra profits for radio service dealers! Thousands have profitably hooked up to the Check-Up through a central telephone number!
This spectacular promotion again proves that wise dealers make money when they handle RCA Tubes. For RCA is always behind them - helping them sell with consumer promotions. Here's how this latest promotion worked: All RCA Tube Check-Up advertising in newspapers featured a central telephone number - having no connection with either distributor or dealer. People desiring an RCA Check-Up called this number and an operator relayed the call to the consumer's nearest qualified RCA Tube dealer. Prospects no longer wondered where to call, whom to see when they needed a radio Check-Up. One number, easy to remember did the trick.
Put new life in your Old Radio!
RCA's 10-Point Check-Up will make it Live Again! Costs only $1.50
Call (Phone) 0000 now!
For your nearest Authorized RCA Service Engineer. He recommends RCA Radio Tubes
Attention-getting, hard-selling, 4-inch ads like the one above appeared on the radio page of newspapers three times a week. These Check-Up convincers produced amazing results - bringing radio service dealers job after job.
RCA also provided free sales helps, including post-cards, check-up tags, direct mail letters, and many others - all of which helped create new business and many profitable sales.
Everyone with a radio set over a year old is a prospect for the RCA 10-Point Radio Check-Up. Not only does the Check-Up give you a worthwhile service profit margin but it also makes prospects pay for being discovered - for it reveals to you the people who need new radios, electric irons, refrigerators and the varied other electrical appliances you carry. See any RCA or Cunningham tube distributor for further details.