Archive
Radio
AUTO RADIO “DE LUXE” (Jan, 1938)

AUTO RADIO “DE LUXE”
TO MEET the growing need for broadcasting from outside points, the National Broadcasting Company, of Chicago, 111., has outfitted a new car with all necessary equipment for this type of work. The vehicle is capable of traveling from place to place at high speeds.

The equipment for this mobile unit consists of two transmitters, three receivers and a gasoline driven generator, all compactly mounted in a specially built touring sedan. Considerable weight reduction was achieved by discarding storage batteries and substituting the generator for the transmitters’ power supply.

Immediately in back of the front seat is the control panel and console, which houses the ultra-high frequency receiver and the specially designed four-stage high gain audio amplifier. To the rear, in the space usually occupied by the back seat, is a large compartment containing a fifty-watt transmitter, used for stationary broadcasts. A forty-watt ultra-high frequency transmitter is used for mobile broadcasts. The mobile unit is so designed that one man can drive and broadcast at the same time.

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Pocket-Sized Radio Used in Private Paging System (Apr, 1956)

My question is, what is an “confined induction loop area”? Does that mean you have to surround your building with an antenna?

Pocket-Sized Radio Used in Private Paging System
Private and individual paging of personnel in plants and offices is possible with Motorola’s pocket-sized “Handie-Talkie.” Weighing only 10 ounces and slightly larger than a package of king-size cigarettes, the set is carried on the person. Its use eliminates the need for public-address type paging and loud call devices such as bells.
A typical paging system, using the “Handie-Talkie,” consists of a selector console with individual buttons for key personnel, and an FM transmitter that radiates alerting tones and voice messages within a confined induction loop area. The receiver is powered by a 4-volt mercury battery and is free from the noise interference common to many industrial establishments. Up to several hundred persons can be paged individually. (Motorola Communications and Electronics, Inc., 4501 Augusta Blvd., Chicago 51, 111.).

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“REPORT FROM ROTTERDAM” (Apr, 1944)

I think this is the only time i have ever seen the word rape used in an advertisement.


“REPORT FROM ROTTERDAM”

Secret underground broadcasters still send out news of what the brave Dutch are doing to upset the Nazi “new Disorder”. Radio furnishes the ONE link between conquered countries and the outside world. In war, as in peace, The Radio Shack continues to play its part in the field of communications . . . now supplying vital equipment to help hasten the day of victory, and revenge for the rape of Rotterdam.

BUY WAR BONDS and STAMPS

THE RADIO SHACK
167 Washington St.
Boston, Mass., U.S.A.

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DELAYING THE BROADCAST (Jun, 1939)

The guy in this article absolutely fits my definition of a hacker. There was a problem where two radio stations were broadcasting the same syndicated content on the same frequency. Listeners near either station had no problem. However there were locations where both signals could be recieved. This would be fine, except for the fact that the cable running to one of the stations was longer than the other, so the signal was delayed by 1/23000 of a second. Enough to cause destructive interference. So the engineers solution was to create an acoustic delay line out of 23 feet of lead pipe stuffed with cloth and gauze with a speaker on one side and a microphone on the other. The slower speed of sound delayed the signal long enough for the two stations to be in sync.

DELAYING THE BROADCAST

A FEW weeks ago the popular radio show, Information Please, used the following catch question:

“Who hears the speaker first, the people at the back of the auditorium, or the people 3,000 miles across the country who are listening to the broadcast of the speech?”

The catch was that radio waves travel with the speed of light, 186,000 miles per second, and sound waves only 1,080 feet per second. Therefore, the answer went, the listeners three thousand miles away would hear it first.

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“Radio Nurse” Watches Child (Jul, 1938)

Did you think that the baby monitor was a recent invention?

“Radio Nurse” Watches Child

A “RADIO NURSE” now brings the nursery into the living room, kitchen, or any other room desired. When a child is sleeping or playing in a room when no older persons are present, every sound within that room can be transmitted to any spot in the house. The outfit consists of a pickup unit, placed near the child to be “watched,” and a loudspeaker, which can be placed in any convenient location.

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Sun Hat Has Built-in Radio (Jun, 1949)

I love the two little vacuum tubes sticking out on top.

Sun Hat Has Built-in Radio

No, that’s not Buck Rogers. It’s just Victor T. Hoeflich and his Radio Hat. The hat works, too—it keeps the sun off your head while you listen to radio programs. The Radio Hat contains a real radio receiver-two miniature tubes, the volume control,
and the antenna (which looks like an oil-can handle) stick out on top. The rest of the circuit is inside the hat’s lining.
The hat weighs only 12 oz. The 7-oz. power supply—a flashlight cell and a B battery—is carried in the pocket. Mr. Hoeflich’s company, American Merri-Lei Corp., Brooklyn, N. Y., makes the talking benny.

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“Tiny” Walking Radio (Feb, 1937)

Devise Tiny Walking Radio

A NOVEL radio transmitter is used by representatives of the Columbia Broadcasting System to conduct roving interviews. The device consists of an antenna and radio frequency oscillator mounted in a cane, a microphone on a wrist strap, batteries in a money belt, and an audio amplifier and modulator in a binocular case. Working range is one mile.

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Pictures by Radio (Jun, 1939)

The printout actually looks really good, though at 3 feet per hour it isn’t the most useful thing in the world.

Pictures by Radio

RADIO facsimile, the process by which pictures and printed matter are transmitted over the air for identical reproduction at the receiving end, is rapidly advancing as a new and valuable service of radio broadcasting. An experimental facsimile network has been established as part of the Mutual Broadcasting System, and already three important stations, WGN, WOR and WLW, are transmitting on regular schedule. Factory-made receivers of medium price are being produced by a large radio set manufacturer and are now advertised and sold by department stores.

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