Category Archives: Radio history

Dr. W. Eberle Thompson: Abolitionist, Underground Railroad Conductor, Doctor, Radio Fan

1939MayRuralRadioShown here is Dr. William Eberle Thompson of Bethel, Ohio. The 104-year-old doctor is wearing headphones and listening to WLW radio. The photo was taken on the occasion of an interview by Ed Mason, WLW Farm Events Announcer, who wrote about the interview in the May 1939 issue of Rural Radio magazine. Mason noted that he “interviews some mighty interesting and important people. But never have I talked to anyone who could match this country doctor who voted twice for Lincoln.”

While the magazine article is lacking in details, the centenarian doctor is almost certainly the same person described in the book The Underground Railroad: An Encyclopedia of People, Places, and Operations. In addition to merely voting for Lincoln, Dr. Thompson played a much greater role in ending slavery. “In his youth, the family’s two-story brick residence at 133 South Main Street was a safehouse. In adulthood, his home and office at 213 East Plane Street received refugees.” The Rural Radio article mentions that Dr. Thompson’s “hands and eyes, now weary from service to his neighbors, had brought him fame as a crack shot with his old muzzle-loading rifle.” The old muzzle loader had been put to good use, since “to secure slaves in flight from posses, Thompson shot their bloodhounds.”

According to this site, Dr. Thompson became an active member of the Bethel Underground Railroad network as a teen. He guided fugitives from Bethel to the Elklick area near Williamsburg. He practiced medicine in the community for eight decades and was active in village government and social affairs.

The headphones in the photo were a gift, as explained in the magazine article:

Long after the switch had been turned which took us off the air, we talked. I learned that he liked to listen to the radio, and especially news broadcasts, but his hearing had failed and he had not used his radio for several years.

When Phil Underwood, WLW engineer, heard this, he opened that magic box that a radio engineer always carries. He brought out headphones, special amplifiers, wires and switches. When we left, Dr. Thompson was sitting by his radio hearing distinctly for the first time in years hearing news by the magic of radio.

The Rural Radio article refers to the doctor as  “C.  Eberle Thompson.”  This is almost certainly an error, since it’s unlikely that there was another centenarian doctor in the same small town.    Dr. Thompson died in 1940, a few months shy of his 105th birthday.  He continued to practice medicine until about a month before his death.





American Television Turns 80

1939AprRadioRetailingAmerican television didn’t really get off the ground until after the war, but by 1939, there were a handful of stations, mostly in New York City, using standards compatible with postwar standards. For example, we’ve previously written about W2XBS, which later became WNBT, and is currently WNBC, which came on the air 80 years ago today, April 30, 1939. That station has been in continuous operation, meaning that modern television in the U.S. is 80 years old. The receivers numbered in the hundreds, and the majority of them were in public places such as taverns. The April 1939 issue of Radio Retailing shows the offerings available from a number of different manufacturers.

The viewer shown here is enjoying a program on her set manufactured by the American Television Corporation.



1944 Portable Phono

1944AprPMPhonoSeventy five years ago this month, the April 1944 issue of Popular Mechanics showed how to make this portable phonograph, to easily bring recorded music to a friend’s house.  Since the friend presumably already owned a radio, then it was a simple matter of plugging this set into the phono input of the friend’s radio.

And if there was no phono input, then you would screw in two 60 watt light bulbs (which served as the dropping resistor for the filaments) which would bring to life the two-tube oscillator contained in the phono.  The music would be heard near the top of the radio dial.

1944AprPMPhonoSchematic



1934 One Tube Regen

1934AprSWcraft2The plans for this handsome one-tube shortwave receiver appeared 85 years ago this month in the April 1934 issue of Short Wave Craft.  The set employed a single type 30 tube as its regenerative detector. The magazine recommended putting together one of these simple sets for those just becoming acquainted with the short waves, in order to acquaint themselves thoroughly with the operating and handling of a shortwave set.  Plug-in coils would allow tuning 16-200 meters.

An antenna of 30-100 feet was said to be adequate, in conjunction with a good ground. But the magazine advised keeping the antenna as high as possible.

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Signal Corps Recruiting Women, 1944

1944Apr23MilJourSeventy-five years ago today, the April 23, 1944, issue of the Milwaukee Journal carried this article noting that recruiters from the Signal Corps were in Milwaukee looking for women to take jobs in Arlington, Virginia.

It’s likely that the women thus employed were part of the operations of radio station WAR, such as the operator shown below.

 



1959 Two Transistor Regen

1959AprPEregenSixty years ago this month, the April 1959 issue of Popular Electronics contained this project, a two-transistor regenerative receiver for the broadcast band. The circuit used a 2N247 (or 2N274) transistor as regenerative detector, with a 2N109 (or 2N217) serving as audio amplifier to drive headphones. A built-in ferrite loopstick served as antenna for portable use, although there were terminals for external antenna and ground to pull in more distant stations.

1959AprPEregenSchematic



Easter Sunday, 1939

1939Apr15RadioGuideOn Easter Sunday, 1939, a sunrise Easter service was held at the Hollywood Bowl and carried live over the Mutual Broadcasting System. The photo here (presumably of the 1938 service) appeared in the April 15, 1939, issue of Radio Guide.  The magazine noted that Mutual would carry not only the service from the Hollywood Bowl, but also from Mt. Rubidoux in Riverside, Cal., and from the steps of the state capitol in Olympia, Wash.

Was it a morning like this?



1941 Lew Bonn Catalog: Batteries & Tubes

We previously posted pages 1-12 of a catalog from Minneapolis radio distributor Lew Bonn Co. from about 1941.  Here are pages 13-19, and we’ll post more pages in the future.  Click on any page to see the full image.  And in most browsers, click a second time for the enlarged version.

Today’s section covers mostly tubes and batteries.  Eventually, we’ll post the full 168 page catalog.

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1939 Four Tube Regen

1939AprPS1The young man shown here is diligently hitting the books, but he’s also entertaining himself, thanks to the combination radio-bookends described 80 years ago this month in the April 1939 issue of Popular Science. The radio is built into one bookend, and the speaker into the other. The two ends can fold down for easy transport, as shown below.

1939AprPS2

The circuit itself contains four tubes. A 6SJ7 pentode serves as regenerative detector, with a 6SF5 and 25A6 as audio amplifier. A 25Z6 full-wave rectifier rounds out the tube compliment. According to the text, the antenna is built in, although the schematic shows connections for external antenna and ground for pulling in the distant stations.

1939AprPS3



Notre Dame de Paris Sound System & Air Raid Sirens

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Incendie Notre Dame de Paris

2019 fire.  Wikipedia photo:  LeLaisserPasserA38 [CC BY-SA 4.0], via Wikimedia Commons

Construction of the Cathedral of Notre-Dame de Paris, which is burning today, began in 1160 and was largely completed in 1260.  It was wired for sound in about 1925, as shown in the illustrations above.  At left, a microphone is visible above the pulpit.  At right, a speaker is mounted on a pillar near the chancel.  One of the cathedral’s distinctive rose windows is visible in the background.  The pictures appeared in the July 1925 issue of Radio News, which reported that the then-700-year-old cathedral had finally been modernized.  According to the magazine, the speakers were installed “so that the congregation may hear the services.”

Another picture, shown below, is also of Notre Dame, but is not immediately recognizable as such.  From the 1918 issue of Electrical Experimenter, the picture shows air raid sirens installed atop one of the towers.  For an look at a 1914 air raid on Paris, see our earlier post.

1918AugElecExp