Category Archives: Radio history

1937 Popular Mechanics Crystal Set

1937FebPMEighty years ago this month, the February 1937 issue of Popular Mechanics showed how to put together this simple crystal set, noting that most of the parts could be found in the experimenter’s junk box.

The set was housed in a homemade wooden cabinet with the tuning dial, crystal detector, and headphone connections on the front plywood panel. The article noted that the set, which was sensitive and selective enough to pull in most local stations, “looks something like a regular tube-type receiver.”

1937FebPM2The set’s circuit, as revealed by the diagram below, is a typical crystal set, although the switching arrangement for the coil appears a bit more complicated than necessary.  However, I guess the second switch makes it look more like a regular tube type receiver.

If you’re thinking of duplicating a crystal set such as this one, please check out my Crystal Set Parts Page for some ideas on where to track them down.

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1917 New Jersey Amateur Station

1917Feb6EveningPublicLedger

A hundred years ago today, the February 6, 1917 edition of the Philadelphia Evening Public Ledger carried this picture of an unidentified New Jersey amateur radio station.

The photo’s caption notes that there were more than 200 such stations in the seven New Jersey counties adjoining Philadelphia.



1947 Radio-Phono Service Call

1947FebRadioMaintIf you think something untoward is happening in this picture from 70 years ago, then you’re wrong.  This radio-phono serviceman is simply making an ordinary service call, and it was important for him to bring the right parts.  This ad from Astatic reminds him that it was always best to use exact manufacturer replacement parts, and that was especially true when it came to phonograph pickup cartridges.

To keep a service call from getting out of hand, the serviceman was advised to carry in his service kit a wide variety of pickups.

The ad appeared in the February 1947 issue of Radio Maintenance.



SWL’ing 1957

1957FebPE

Sixty years ago this month, the cover of the February 1957 issue of Popular Electronics showed this avid SWL tuning the foreign shortwave bands with her Hammarlund HQ-110 receiver.

She was able to tune in numerous English-language programs thanks to the extensive listing of broadcasts contained in the magazine.  Among the selections was Radio Moscow as shown in the photo below of these comrades working the console.

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Groundhog Day 1942: Last Prewar Automobile

1942Feb16Lifex
1942groundhogSeventy-five years ago today, America celebrated its first Groundhog Day of the war.  But because of wartime censorship, the groundhog’s report was not made public.  Here, the Chicago Tribune, February 2, 1942, announces that the reports will not be available.

During the war, weather reports could have proven useful to the enemy, and were largely prohibited.  Newspapers were allowed to print the Weather Bureau’s official forecast, but no other commentary was allowed.  Certainly, an accurate prediction of whether or not the country would endure another six weeks of winter would not be permitted, as this information would be vitally important to the enemy.

Broadcasters even had to be careful with any mention of the weather.  For example, even sports announcers were supposed to refrain from giving the weather conditions affecting the game.  With enough such reports, an enemy listener would be able to piece together conditions throughout the nation.  The idea was simply to deprive them entirely of that possible source of information.

The requirements for broadcasters were printed in the January 19, 1942, issue of Broadcasting:

Weather reports for use on radio will be authorized by the United States Weather Bureau. This material is permissible. Confirmation should be obtained that the report actually came from the Weather Bureau. Special care should be taken against inadvertent references to weather conditions during sports broadcasts, special events and similar projects.

Information concerning road conditions, where such information is essential to safeguarding human life, may be broadcast when requested by a Federal, State or municipal source.

Groundhog Day 1942 also saw the end of prewar auto production, as the U.S. auto industry geared up for war.  The photo at the top of the page is the last automobile to be produced until the war ended.  This gray Buick rolled off the assembly line at 1:31 PM, February 2, 1942, as shown in the February 16, 1942 issue of Life magazine.

The groundhog at work during peacetime.

The groundhog at work during peacetime.



1927 Popular Mechanics Crystal Set

1927FebPM

Ninety years ago, the February 1927 issue of Popular Mechanics showed how to put together this simple but effective crystal set.

1927FebPM2The cost of the parts (not including the headphones) was less than a dollar. The set was particularly recommended for boy builders, but as shown in this picture of grandmother enjoying a listen, the grown ups would also enjoy it.

The spiderweb style coil was wound on a cardboard form, and included a slider on one of the spokes for tuning. The crystal holder was mounted on top, and the wiring was neatly recessed into the wooden base, which called for a coat of mahogany or walnut stain. For best results, a 75-80 foot outdoor antenna was recommended, with a good ground to a cold water pipe. The set was said to provide good volume on local stations, with good selectivity.



1942 Farm Sets for Emergency Use

1942JanService

A month after Pearl Harbor, civilian radios were still being produced. The War Production Board was created on January 16, 1942, and issued its order  on March 7, for consumer radio production to cease on April 22.  During those intervening months, there was uncertainty as to the availability of both radios and parts, but both production and advertising continued, but with the War clearly in mind.

Later in the War, the availability of B batteries became an issue. In fact, numerous construction articles, such as this one from 1943, focused on how to make a battery set work on household current. But in the early days of the war, there was a demand for battery operated sets, since it was believed that there might be blackouts and the AC power wouldn’t be available.

This is apparent from the Radiola ad shown above from the January 1942 issue of Service magazine.  Directed at dealers, the ad shows two “farm set” models, suitable for use with batteries on farms that had not been electrified. This ad suggested a new market for such sets, as an emergency set “that stays on when the power goes off.” It also suggested that electrification might be delayed in some areas due to the war.

The ad noted that one of these sets could be the best of both worlds. An optional accessory was the RCA model CV-42 “Electrofier” which would allow either of these sets to operate on household current. So there was a market for these sets even in town: The owner could run it off household current, but quickly switch over to batteries during a blackout.



 

NM Public Health Nurse’s Radio, 1943

Taken in January 1943, this photograph shows a Peñasco, New Mexico NMclinic2public health nurse relaxing with the radio in her quarters after dinner.  According to the photo’s caption,  “the radio is the only contact with the outside world. Papers come rarely to the town, and the nurse (identified in other photos as Marjorie Muller) at the clinic operated by the Taos County cooperative health association must depend on the news broadcasts to follow daily events.”  She served at the clinic shown at right.

The radio is Zenith model 6G-601-M, as revealed by the distinctive sailboat design on the speaker grill. You can see a well preserved example at this link.  The set was similar in circuitry and styling to the Transoceanic, but covered the broadcast band only.  You can see and hear a nicely preserved specimen of the radio at this video:

The six tube portable (3Q5GT, 117ZG, 1LH4, 1LF, 1LN5, 1LA6) could run off 110 volt household current or batteries. It’s almost certain that the set was being run off batteries, since it seems very unlikely that the clinic had electric power. This and other photos show a kerosene lamp, and there’s no evidence of electric wires in any of the photos. The clinic did have a telephone, as shown in another photo in the collection.

NMclinic3The radio’s dial is tuned to just below 900 kHz. An antenna is visible coming out the window in the picture here of Nurse Muller outside her residence. According to the 1943 White’s Radio Log, there don’t appear to be any powerful West Coast stations near that frequency. But it was night, she had a powerful receiver and an outdoor antenna, and it’s likely that she was listening to WLS in Chicago on 890 kHz. If that’s the case, it’s possible she was listening to NBC Blue Network news with Earl Goodwin at  7:00 Central War Time, which would be 6:00 P.M. in New Mexico.

The photographer for all of the photos shown here was Farm Security Administration/Office of War Information photographer John Collier, Jr.  More of his photos of the clinic are available at the Library of Congress website.

 



High School Victory Corps: 1942

VictoryCorpsRadio

According to the caption of this 1942 Office of War Information photo, this Los Angeles high school student took her radio and code instruction seriously. She was a member of the high school Victory Corps of Polytechnic High School.

Elsewhere in the city, the student shown below was similarly taking her defense training seriously as part of the Victory Corps. She was the sharpshooter of the girls’ rifle team at Roosevelt High School. The caption of this photo notes that rifle practice was one of the phases of the Corps’ activities.

VictoryCorpsRifle



1937 Ohio River Flood

1937Feb13WLS

Eighty years ago this week, the United States was in the midst of one of its greatest natural disasters, the Ohio River flood of 1937.

Damage was widespread, starting at Pittsburgh, which had experienced severe flooding the year before, to Cairo, Illinois. Damage was light in the Pittsburgh area, but there was extensive damage in Ohio, West Virginia, Kentucky, Indiana, and Illinois. The pictures at the top of the page are from Evansville, Indiana, and appear in the February 13, 1937, issue of Stand By, the program guide magazine of WLS Chicago, whose mobile unit is shown. The boats shown in the picture, docked at the back door of a hotel, are actually on the street, as shown by the mostly submerged street sign in the picture.

The WLS magazine reported that “radio became the principal means of communication, especially during the early days of the flood, and thousands of lives were saved because of the radio directions sent to rescue workers. Commercial, amateur and military stations all provided communication.”

Hazelton, Indiana, January 23, 1937. National Weather Service photo.

Hazelton, Indiana, January 23, 1937. National Weather Service photo.

In Evansville, the local station, WGBF, had an emergency radio set up at the relief headquarters. The station went to 24 hour service, and the programs were interrupted frequently to broadcast relief messages.

Downtown Huntington, WV, during the flood. Wikipedia photo.

The flood caused 385 deaths, with a million left homeless. Property damage reached $500 million, and relief and recovery was strained, with the disaster coming in the depth of the depression and only a few years after the Dust Bowl.  The head of the Red Cross called the disaster the greatest since the war.  For many impacted areas, it was the most severe flood yet experienced.

The water levels began to rise on January 5, and rains throughout the

Ohio basin continued.  By January 23, it was clear that the flood would be severe.  Martial law was declared in Evansville on January 23.  On today’s date, the water crested in Cincinnati at 80 feet, the highest level in the city’s history.  By the next day, 70% of Louisville was under water.  It wasn’t until February 5 when the water levels dropped below flood stage in most areas.

As might be expected, amateur radio operators played a key role in communications, and many of these stories were recorded in the April, 1937, issue of QST.  Since many of the active hams were also involved in the Army Amateur Radio Service or the Naval Reserve, Army and Navy call signs were often used in addition to amateur calls.

In an action unprecedented since the war, on January 26, the FCC entirely closed the 160 and 80 meter bands nationwide to all but those hams directly involved in flood relief. The FCC order stated:

To all amateur licensees: The Federal Communications Commission has been advised that the only contact with many flooded areas is by amateur radio, and since it is of vital importance that communications with flooded areas be handled expeditionsly, IT IS ORDERED that no transmissions except those relating to relief work or other emergencies be made within any of the authorized amateur bands below 4000 kilocycles until the Commission determines that the present emergency no longer exists.

This order was rescinded on February 5.  The FCC did allow the ARRL to select 60 “vigilantes” to monitor the bands and inform any offenders of the order.  According to QST, this order had a very positive impact in reducing interference.  160 and 80 meters were still packed with signals relaying emergency traffic, but the nets were able to work very effectively when they had the bands to themselves.

Hundreds of call signs in all of the affected states are included in the QST report, but it also acknowledges that it would be impossible to list all of the hams who participated.

The 30,000 residents of Parkersburg, West Virginia, were cut off from the outside world, and about a fourth of them were homeless. Herbert Romine, W8GDF, of nearby West Milford hurried to the town. Lacking sufficient equipment, he hurredly assembled several transmitters from the serviceman’s parts stock, and established stations on fire boats in the city. These hastily constructed transmitters consisted of type 45 tube oscillators, along with another 45 serving as modulator. QST noted that this work undoubtedly saved a number of lives.

Romine then put station WPAR in Parkersburg back on the air, having to dismantle and move it a number of times as the waters rose. Another ham, W8BRE, helped put together a 160 meter radio to link the station with the Naval Reserve station.

At Leon, WV, inactive ham Clarence Casto, W8JJA, had been off the air for three years. But with the emergency, he hastily assembled an emergency version of his station to keep the town in contact.

A few miles downstream in Point Pleasant, WV, William Stone, W8MAO, was able to use a portable 20 meter rig to notify authorities in Charleston that medical supplies were needed by air.  This station was set up in the court house on the judge’s bench.

w8yxgeneratorIn Ohio, much of the relief traffic passed through W8YX, the club station of the University of Cincinnati.  Since commercial power had become unavailable, the station operated with the generator setup shown here.  Two 15 kva alternators were run by the power takeoff of a McCormick-Deering tractor.

In Kentucky, since Frankfort was cut off and flooded, the Governor of the state relied upon an amateur for emergency communications. W9AZY, who was also affiliated with a broadcast station, was able to set up a shortwave link between the Governor and his staff and broadcast station WLAP.

w9mwcThe man identified as “one of the flood’s ham heroes” was W.O. Bryant, W9NKD. On January 22, WHAS in Louisville broadcast the information that Carrollton, KY, population 2500, had been cut off from the outside world. The broadcast included a plea for an amateur to go there with emergency equipment. Bryant answered the call and brought his equipment by boat, where he was the only source of communications for 10 days.  Another such amateur is shown to the left, W9MWC, taking emergency equipment by boat to Shawneetown, KY, in temperatures of 12 degrees and sleet.