Category Archives: Radio history

Selling Car Radios in 1938

1938JuneRadioRetailingEighty years ago, this unidentified service station, shown in the June 1938 issue of Radio Retailing,  came up with this method of keeping customers entertained, while at the same time netting a few prospects to purchase a radio for their car. While the car was being serviced, “anything that takes appreciable time,” the attendant swung a Crosley auto radio over the door, turned it on, and invited the driver to push the tuning buttons.

The radio was mounted on two wire brackets covered with rubber. The battery and antenna were external.

The set appears to be a Crosley model A258 Fiver Roamio.



W9ZYB, Norwood Park, IL, 1938

1938JuneRadioNewsShown here on the cover of the June 1938 issue of Radio News is the well equipped station of Bert Heuvelman, W9ZYB, of Norwood Park, IL, a suburb of Chicago. The attractive homebrew transmitter, mounted on a panel of blue linoleum, consisted of a 6F6 crystal oscillator, T20 and T55 buffers, with two T200’s in the final running a kilowatt. The crystal mike was fed to a pair of 2A3’s driving a pair of 822’s in the modulator. Band switching enabled fast band changes. A Hallicrafters receiver was used, and the output was constantly monitored with an oscillograph and modulation meter.

Assisting Mr. Heuvelman is Miss Naomi Anderson, a professional model borrowed from the magazine’s sister publication, Popular Photography.

The magazine notes that the photo was captured with the help of over 3000 watts of flood lights illuminating the scene, and was the work of Henry F. Kroeger, Jr., of Chicago, who used a Kodak Retina II.



Soldering: So Simple A Child Can Do It

1938JuneRadioNews1For those who believe that soldering is just too difficult, we offer this counter-example from the June 1938 issue of Radio News.  The pictures bears only the caption, “set repairing carefully done by experienced servicewoman.”

For those who believe the cost of tools is just too great an investment, we offer the following perfectly adequate soldering irons, even easier to use than the one this young woman mastered eighty years ago:

 



Learn Japanese Code, 1943

1943JuneRadioNewsYou can call me a skeptic, but if I had been a young man 75 years ago and encountered this ad in the June 1943 issue of Radio News, I think I would have had my doubts as to the bona fides of the New York Technical Institute.

First of all, despite the Big Apple moniker, the Institute was located at 786 Broad Street, Newark, New Jersey.

Of course, there’s something to be said for getting out of the rut, not griping, and making yourself valuable.  And the ad pointed out that men with outstanding ability and specialized training were the ones who got ahead both in the armed forces and in civilian life.  So the concept of mastering Japanese Morse code probably wasn’t a bad one.

But I have my doubts as to what the New York Technical Institute, Japanese Code Section, could actually deliver, especially given the rather princely sum for the course, a total of $57.50.

And you had to be committed to sign up.  The ad didn’t ask you to send a stamp for more information about the course.  You were expected to send $10 for the first lesson.  If you were satisfied with the experience, then the remaining 19 lessons were an additional $2.50 each.  Of course, the dollars in question were made out of silver at the time, and the value of a silver dollar then was about the same as it is today.  So the price of that first lesson, sight unseen, was about $320 in today’s money.  I think I would have stayed in my rut.

This might be a bargain if they sent you some records or even Instructograph tapes to master the Japanese code at home.  But there’s no indication that any such thing was included.  And I suspect that if these features had been offered, the ad would have said something about them.  Instead, the 20 lessons apparently consisted of nothing but paper, with no indication of how the student was expected to gain any practical experience before getting out of his rut.

For those (then or now) interested in learning more about the Japanese telegraph code, much valuable information was contained in two articles published in QST in September 1942 and October 1943.  There was, understandably, great interest in the subject.  The 1943 article pointed out that many requests had been received for back issues containing the 1942 article, even though they had been long out of print.

I haven’t been able to find any other information about the Japanese Code Section of the New York Technical Institute.  I doubt if very many readers sent them a $10 money order.



Wartime Emergency Radio Service (WERS)

1943JuneRadioCraftCoverSeventy-five years ago this month, the June 1943 issue of Radio Craft carried a cover feature on the Wartime Emergency Radio Service (WERS). Within a day of Pearl Harbor, hams were off the air, but there was still a need for communications during civil emergencies, and WERS was devised to fill the need.

A New York mobile WERS installation.

A New York mobile WERS installation.

Local governments were granted licenses for use of the 2-1/2 and 1-1/4 meter bands, and it was primarily hams who were called upon to serve as operators.  In most cases, it was also the hams who built the equipment, such as this 1944 WERS transceiver.



WW2 Clandestine Dutch Receivers

Another collection of clandestine Dutch radios.

 

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Anne Frank. Wikipedia image.

On this date seventy-five years ago, June 15, 1943, Anne Frank noted in her diary that everyone in Holland had been directed to turn in their radios.  She noted that throughout Holland, people were scrambling to find old radios to turn in so that they could keep another set, and that those in her group had arranged to get a small secret set.

As we have written previously, some ingenious examples of clandestine Dutch receivers are shown above.

 



KOA Denver, 1943

1943June14BCSeventy-five years ago today, KOA Denver ran this ad in the June 14, 1943, issue of Broadcasting.

The station ran its weekly “Music Center for Enlisted Men” for the morale of servicemen stationed in the Denver area. The half hour program ran Friday nights, and enlisted men participated in choirs and dramatic presentations. The project was spearheaded by the wifes of commanding generals and post commanders in the area, along with Colorado’s governor and his wife.

 



AM Radio Direction Finding

1958JuneRadioElecSixty years ago this month, the June 1958 issue of Radio Electronics carried the plans for this transistorized radio compass.

The circuit was nothing more than a superheterodyne receiver covering the standard broadcast band and, if desired, the longwave band. It was specifically designed for use as a radio compass. Any portable AM radio with a loopstick antenna can be used for the same purpose, although the magnetic compass mounted directly on the case made use of this one quite convenient.

The article specified that it was a worthwhile investiment for “people interested in outdoor activities such as motorboating, sailing, hunting, trapping, berry picking, camping, hiking or other activity where there is a possibility of getting lost.”

Even with this modest receiver, or even the most inexpensive AM transistor radio, the method of locating yourself is actually extremely accurate. All you need is an AM radio and a good map marked with the locations of local broadcast stations. The ferrite core antenna coil is mounted parallel to one of the sides of the case of the radio. Fortunately, the vast majority of inexpensive radios were also built this way. The antenna is very directional, and produces a sharp null when the length of the antenna is pointed directly at the station.

To use as a direction finder, the radio is placed on the map, and with the compass, the map is oriented to the map. The radio is turned until the signal fades out. At that point, the side of the radio is used as a straightedge, and a line is drawn through the radio station.

This process is repeated with a second station. The point on the map where the two lines intersect is your location.

I’ve tried this method using an inexpensive transistor radio, and the accuracy is astonishingly good. In an urban area, I can generally find my location within a few hundred yards. At night, using distant signal clear channel stations, I can determine my location within about twenty miles.

The exact location of a radio station’s transmitter (which might be different from its city of license or studio location) can be looked up at the FCC website.  Once stations are found, their latitudes and longitudes can be plotted on a map, or even on graph paper. With a bit of practice, you will be able to very accurately determine your location with very minimal equipment.

Of course, a GPS receiver will give more accurate results much more easily.  But the GPS receiver depends on GPS satellites being operational, which might not be a given in some emergency situations.  Also, if the sky is obscured by heavy foliage, a signal might be unavailable, but AM radio signals would come in loud and clear via ground wave.  As long as at least two AM radio stations are on the air, an AM radio can tell you your location quite accurately.

I’ve found that a few of the local broadcast stations seem to give an inaccurate bearing. It’s possible that some of them moved their transmitter site without telling the FCC, or possibly that station’s signal is being reflected by some nearby object. To get a precise location, I plot several bearings on the map, and ignore the one that seems not to intersect the others. The other lines are generally very close together, and I estimate my position based upon where those other lines converge.

More information about this method of direction finding can be found at this post.



N9ZGB QSL Card, 1938

n9zgbHere’s an unusual example of an “N” amateur call sign from 1938, from the June 1938 issue of All Wave Radio magazine.  The card was actually for a QSO by W9GZB, but the owner of that call, Arthur “Musty” Musgrave, 527 Union St., Emporia, Kansas, was a member of the Naval Communication Reserve, for which the corresponding “N” call sign was used. That service dates back to at least 1929, since there is an editorial in the August 1929 issue of QST encourage amateurs to consider enlistment.

According to an editorial in QST for August 1940, the Naval Communication Reserve was open to men aged 15-35. Former servicemen in any branch of the military were eligible up to the age of 50. Amateur radio operators could enlist as seamen and were immediately eligible to take the examination for the radioman rating. Physical fitness requirements were the same as those for the regular Navy. Experienced radiotelegraph operators were especially desired, since the need for signalmen at the time exceeded the need for radiomen.

Musgrave, the sender of this card, was a linotype operator with the Emporia Gazette newspaper. According to the December 20, 1940, issue of that paper, he was called up to service in 1940 and assigned to the San Diego naval base.  After the war, Musgrave’s call became W0ZGB, which he held until at least 1960.  He died in Kansas in 1971.

The signature on the left-hand margin of the card is the reason why the QSL was shown in the magazine.

This is the signature of William Allen White. W4DVO had sent it to the magazine along with the story of working Musgrave on 80 meter CW. After copying the QTH, the Florida station mentioned that Emporia “owed its place on the map to William Allen White.” To that, Musgrave replied, “you’re telling me!”, and told the Florida contact that he had worked for him for over twenty years. To prove the point, he had his boss autograph the card. According to the magazine, “something tells us that ZGB is going to be a popular station with the autograph hunters.”

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William Allen White. Wikipedia image.

William Allen White was, indeed, the owner and editor of the Emporia Gazette, where Musgrave worked as a linotype operator.  White, was regarded as a spokesman for Middle America and was dubbed the “Sage of Emporia.”  Earlier a supporter of Teddy Roosevelt’s run for President on the Bull Moose ticket, he was later tapped by FDR to help generate support for the Allies before America’s entry into the Second World War.

 



KNX Victory Garden, 1943

1943Jun7BCShown here is the victory garden of KNX, Los Angeles. The picture appeared 75 years ago today in the June 7, 1943, issue of Broadcasting magazine.

According to the ad, the station went to work after the call went out from Washington to raise vegetables. It noted that the soil under glamorous Hollywood had been, just a few years earlier, fertile farm land.

So the station ripped out the terrace in front of its studio, plowed the soil, fertilized and cultivated it. As a model to its listeners, the station grew vegetables to show what California was capable of.

The station’s first crop went to the Los Angeles Orphans’ Home. The practical experience of growing crops went by proxy to many thousands of listeners.