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The Crosley Radio Gallery

MUSEUM OF YESTERDAY






 

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DEPRESSION ERA .
HOME RECEIVERS
 
The Great Depression brought about a new interest in Radio in the home.
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The onset of the Great Depression saw an end to many of the practices that individuals and families enjoyed in the prosperous 1920s. Motion picture and supper club entertainment had became an unaffordable luxury for many. Persons in rural areas were now isolated because of the cost of even short distance travel, so the new invention of the Radio, and its introduction into the home, seemed to be a cost-effective alternative to public places of entertainment.

For the typical American family of the early 1930s, a superhetrodyne radio receiver in the home brought in news of the world. Through this relatively inexpensive home appliance, families in places such as rural West Virginia, could listen in on what was going on with their counter-parts in places like New York, Washington D.C., San Francisco, Detroit, and even foreign countries. Radio melted down the cultural divides between geographic locations, and carried desperate folks through the worst depression in the Nation's history followed by the great "War to End All Wars."

In studying the history of civilization in the United States, the Railroads are generally credited with having shaped the American landscape, but it was Radio that brought America together and formed the cultural bonds between Americans from all walks of life. Through the programs that Radio brought into the home, every listener could learn from and identify with his neighbors in every corner of the nation.

In this gallery, we celebrate the Depression Era home radio, the one device responsible for keeping the sanity of a nation through almost two decades of financial despair and world turmoil.

 

Click photo to obtain schematic diagram for this radio

Philco Model 87 radio was an early set designed for exclusively 110 volt AC operation. This chassis design of home receiver, which saw many cabinet variations, represented the transition between battery era radios and the advent of plug-in sets that began about the year 1929. While Philco was a leader in the market, several other manufacturers were following this design concept in that same era. The museum recently acquired this Model 87 set, shown here in it's completely restored state, as a replacement for our previous Model 87 which was lost in the New Orleans Katrina flood of 2005.

While console radios were manufactured well into the 1950s, and they actually saw a resurgence just prior to World War II, the early years of the "Great Depression," and the financial restraints brought on during that period, fostered the development of a new, economical player in the radio market known as the "Cathedral" or "Tomb Stone" table top radio.

If you would like to follow along with the restoration of the Model 87 as it went through the museum's restoration shop, we have provided some glimpses of the restoration processes that were employed.

Click HERE for an article and photos of the replacement of the set's capacitor bank.

Cabinet restoration Click Here

To see a short video of the completed set in operation, click here

 

Major Edwin Armstrong

While Dr. Lee DeForest was credited with the discovery or invention of the vacuum tube, court testimony in later patent infringement cases determined that DeForest did not totally understand the operation of his own invention. This came to light when another inventor and engineer, Major Edwin W. Armstrong began to employ DeForest's discovery in the construction of practical radio receiving apparatus. Armstrong first designed the Super-Regenerative receiver which employed an amplified feedback scheme, using the Audion, to boost signals to the point where they could be easily heard on earphones, or amplified for use with a loud speaker. Most of the early 1920s radios employed this technology, many with multiple stages and an array of dials which made use and tuning difficult. By the late '20s, Armstrong had come up with a more practical receiver which he called the "Super-hetrodyne." This system used a local oscillator beating against the incoming signal, which formed an intermediate or IF signal that could then be detected and amplified by additional stages. The resulting sets only required one tuning dial, which simplified operation and made the receivers highly stable and dependable for home use. The receivers shown in this section of the museum employ Armstrong's Super-Hetrodyne technology. This improvement in receiver technology is really what enabled the purchase of home radios take off in the early years of the Great Depression.

Major Armstrong gave us many of radio's improvements and innovations such as FM reception and even early television technology. His life was spent in almost constant lawsuits with David Sarnoff of RCA, who seemed to be bent on Armstrong's destruction. This rivalry ensued after Armstrong refused to sell his patents to RCA. While DeForest, Armstrong and Sarnoff are all considered pioneers of modern radio, Armstrong held the distinction of having been the first inventor to bring his products to the finish line. Unfortunately, after loosing a number of battles in the courts with Sarnoff, Major Armstrong, now penniless, tragically ended his own life by stepping out of an eighth floor window and falling to his death.


The 1931 Philco Model 70 is considered the "mother" of all depression era cathedral radios. Manufactured by the Philadelphia Storage Battery Company, which later was acquired by Ford Motor Company, these sets were among the first radios to utilize the simpler "superhetrodyne" circuitry developed by Major Edwin Armstrong, and combined that with mass-production techniques that allowed the radios to be sold at a price that even a depression era household could afford.

Today, the Philco Model 70 has become an icon representing the depression era cathedral radio spirit of wireless collecting. This beautiful example was only recently acquired by the Museum Of Yesterday, and is a proud addition to our collection. Shown below, the rear of the set illustrates the simple array of components that set the stage for the design of most table radios built before World War II.

 
A classic example of an Atwater-Kent Model 84 "cathedral" radio from the height of the Great Depression. There were many manufacturers of Depression era "cathedral" and "tomb-stone" radios, however the biggest players in the market place by far, during the 1930s, were Atwater-Kent, Philco, Crosley and Zenith. The Model 84 was Atwater-Kent's offering to compete with the popular Philco 70 and 90 series sets.
 
The Atwater Kent model 185 was an economy offering to the AK line of Depression radios.
The Philco Farm Radio was a basic superhetrodyne circuit similar to the Model 70, however, like it's 1920's predecessors, it was designed to operate on storage batteries for service in rural areas where commercial electricity was not available.
 

1937 Crosley "FIVER" Table-Top Radio Model 547 was Crosley's "cost cutting" set for the later Depression years. Based on other "tomb stone" radios that preceded it, Crosley had cut a few corners in the design of this radio in order to allow a reliable table radio at an even lower selling price for a Depression plagued nation.

An interesting side note: When the Museum of Yesterday obtained this radio for our collection, only minimal repairs were needed to bring it to full restoration. The set was still functioning with all of it's original and nearly 80 year old Crosley brand vacuum tubes, and only minimal wax capacitor replacement was required to bring it back to full reliable working condition. Just try to get that degree of longevity from even an expensive modern day radio.

 
The Crosley "Playboy" cathedral radio was an early attempt by Powell Crosley's company to compete with the popular Philco "cathedral" radio line.
 
1936 RCA Model 7T "tomb stone" Radio
 
RCA Model 6K1 Receiver from 1937 featured AM-plus short wave "Police Band" coverage. While console radios were manufactured throughout the Depression years, console sets were considered a luxury for the rich during those early lean years of the 1930s. It was not until some sectors of the nation began to recover that consoles were again in demand. The years between 1937 and 1941 saw a proliferation in the manufacture and sale of console radios.
 
With cabinet styles changing, The Philco 37-89 1937 receiver was one of the last typical "tombstone" sets manufactured by Philco. By the late 1930s, bakelite, plastic and Catalin radio cases were in vogue, and wood cabinet radios often offered artistic "Art Nouveau" styles.
 
Stewart-Warner "tomb stone" Radio
 
Budget "tombstone" from mid 1930s manufactured by Universal Radio Corp.
 
This Emerson wood cabinet table radio from the mid-1930s is an indicator of changing cabinet styles.
 
President Franklin D. Roosevelt and the Fireside Chats
The radio became an important fixture in the American home during the Great Depression. In a nation in despair, any hopeful news was welcome. President Franklin D. Roosevelt proved the effectiveness of Radio as the great communicator when he presented his "Fireside Chats" which were broadcasts designed to speak intimately into the living rooms of Americans who were affected by the Depression. By the early 1930s, radio had established itself as a way for every American family to have a finger on the pulse of world news.
 
 
RADIO IN WARTIME AND THE POST WAR YEARS
 
 

In 1938, the Great Depression was winding down and Americans were again seeing prosperity on the horizon. But a new concern was now on the minds of people. An evil power had risen to world prominence in Europe as Nazi Germany sought to conquer and enslave the "free world." Americans were becoming increasingly wary in fear that the United States would eventually have to come to the rescue of European countries that were falling to Hitler's advancing warriors. Just as they had in the Depression years, Americans turned to their radios as a source of world news.

By 1940, Radio broadcasting had expanded its horizons around the world, and the listening audiences saw the emergence of a new radio phenomenon, the "traveling journalist." From that crop of Wartime journalists came some of America's greatest newsmen. Edward R. Morrow, John Daly, Alex Dreier, H.V. Caltenborn, Lowell Thomas and Walter Winchell were only a few of the esteemed newsmen who began their careers in this trying period of American history.

From December of 1941, corresponding with of the bombing of Pearl Harbor, until the end of the war, the radio manufacturing industry in the United States, completely ceased the production of home and commercial electronics equipment in order to tool up for the production of military equipment and supplies needed on the war front. For this reason, there were no home radio models listed during the years 1942-1945. Just as with automobiles, washing machines, and other household appliances, it was virtually impossible to obtain newly manufactured electrical or electronic products during the entire era of World War II.

 

THE 'WAR' BEFORE THE WAR

Radio had truly found its niche in the American lifestyle. What once was a whimsical entertainment device, now was being relied upon to keep its listeners informed of life changing real world events. If anyone in the broadcast industry at the time had doubts as to how deeply Radio affected the lives of Americans, an experiment conducted by a young actor of the time, would serve to prove just how powerful a communicator Radio was.


Orson Wells

In late October of 1938, actor Carl Van Vechten, better known to most by his stage name, Orson Wells, set out to prove his own theory as to just how powerful a medium radio was. On Sunday night, October 30, 1938, as war wary Americans were preparing for their annual dose of Halloween trickery at the hands of doorbell ringing youths, Wells aired a radio play on his weekly drama program, "The Mercury Theatre Of The Air," in which he used newly developed techniques unique to the radio news industry to emulate an attack on the world by Martian invaders. Wells recognized that people were now comfortable with placing their complete trust in whatever "news" they heard over the radio. He also recognized that in a world pre-occupied with War, that Radio held the power to be misused as a powerful propaganda weapon. By employing common radio news delivery techniques of the day, such as on-site remote reports, interviews with government officials, and even tapping on the popular Franklin D. Roosevelt "Fire Side Chats," Wells threw the entire United States into a panic by simply adapting a classic H.G. Wells science-fiction novel, and presenting it in such a way as to sound like it was unfolding through a progression of on on-air radio news reports.

The program was not even off the air yet when CBS Radio officials began to learn of the havoc that Wells was causing across the country. Persons were fleeing their homes, police and public officials were responding to all-out civil disturbance, and there were even suicides reported as Wells continued to spin his yarn from inside the isolated CBS studio. The consequences were severe as the U.S. Government, and America's citizens now realized the unparalleled power of Radio to influence the minds of its listeners. Wells' purely fictional Mercury Theatre broadcast of the "War Of The Worlds," was directly responsible for untold damage and effect on the lives of his listeners, immediately prompting the broadcast industry to adopt new standards of broadcasting, and the government to conduct Congressional hearings resulting in the creation of the Federal Communications Commission as the government empowered legal regulator of the public air waves.

 
1940 Crosley Model 6519 receiver

A personal recollection from museum founder and chairman John DeMajo:

The Crosley Model 6519 is another radio from my past. My father had a one of these in the workshop / laboratory of our Gentilly Terrace home back in the late 1940s. It was a present that he had received from my mother, who was his fiancee at the time, upon his graduation from Tulane University College of Engineering in 1938. With a great deal of care on his part, the set had made it through the war years, and it was still functioning perfectly when my parents moved into their own home in 1946 after the war had ended.

My dad and I usually listened to the little Crosley radio "out in the shop" when we were working on Saturday morning projects back in the late '40s through the early 1950's. The Saturday morning radio lineup in that era included shows like "Galen Drake," "Let's Pretend" and "Grand Central Station" on the network stations. Later around mid-day, we would switch to one of New Orleans' pioneer local independent stations, WJBW "studios in the Cigali Building," for their local DJ show known as"Spinn Inn."

In several formative phases of my life, Radio played an important role, as all of the members of my family valued their radios and the favorite shows to which they listened. Thus, time spent with family usually involved radio in some way.

 
Another similar Crosley model (Model 649) based on the same chassis. Crosley had a number of models that featured both plastic and wood cabinets in this same basic design. The plastic or cabinet sets also came in a variety of colors. The last models were produced in 1940, and the popular design was abandoned with the start of World War II.
 
One of the radio manufacturers of the mid- 20th Century that did not make a popular comeback after World War-II, was the Howard Radio Company. While Howard made some outstanding radios in the 1930s, and was a big player in the military radio industry, by 1950, the company had disappeared. This rare example of a Howard product is their Model 906, which was made in 1947. The photo below is a rear view of the chassis of the receiver above. It is interesting to note that, while some companies switched to "loctal" and the new miniature tubes that were in wide use during the war, some of the "old line" companies continued to use 8 pin Octal tubes even though newer tube types were available.
 
Another popular radio in the pre and post WW-II years was this Zenith Model 6D-312 often referred to as the "Bee Hive" or "Pancake" because of it's unusual stacked speaker grill. The earlier sets in the series utilized 8 pin octal tubes, along with a filament ballast tube. Later sets of this type were equipped with power transformers and low filament voltage "Loctal" tubes which were developed during the War for rugged military service. The sets are so popular with "Baby Boomers," that they are being scooped up on EBAY auctions at many times their original cost, and a 1990s solid-state reproduction AM-FM-Cassette Player set, made overseas under the name "Crosley," is still a big seller on auction sites and in flea markets even today.
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One of the most important steps in the restoration of any old AC powered radio, is the replacement of capacitors that fall within the set's B+ or high voltage power chain. Capacitors, such as the paper and wax examples from the Zenith radio above, dry out and fail over time. The average life expectancy of these parts was about 20 years when the sets were manufactured. Attempting to power up an old radio without first "re-caping" (replacement) of these critical components, can result in destruction of irreplaceable parts such as rectifier tubes, power transformers and speaker field coils. Applying voltage to an untested radio can also result fire or injury if a component fails violently. Do not rely on instrument checks of capacitors where B+ voltages are concerned because parts which check OK on the tester, can still fail under load when high voltages are applied.

Besides Electrolytics and capacitors exposed to high voltages, another critical capacitor replacement is the audio coupling capacitor. Failure or severe value change in this component over time, can result in high voltage being dumped onto the grid of the audio output stage, resulting in damage to the tube from overheating.

One other tip: always be sure to replace capacitors with not only the same value as the original, but also an equivalent working voltage rating. Capacitors sold in places like Radio Shack stores, are usually rated for today's low voltage solid-state projects. Voltages in old tube radios can often exceed 400 volts DC, so make sure you obtain replacement parts that meet or exceed the full specifications of the original parts. Capacitors designed for use in old radios are hard to obtain locally, but mail order houses such as Antique Radio Supply in Tempe, Arizona, have ample supplies of restoration quality components.

The old professor's rule here is to "play it safe" and replace any wax or paper capacitors that are exposed to the radio's line or B+ voltages.

 

(Service info is available for the above radio. Click the photo to download a PDF file.)

The Bendix Corporation began operations in the early 1900's as a manufacturer of automobile speedometers and accessories. Later, they were instrumental in the War effort as a pioneer in aircraft and bomb navigation systems. After World War II, they licensed the Bendix name to a subsidiary company which found a niche as a manufacturer of home appliances such as washing machines, radios and televisions. While the radio shown above is a much later piece than some of the more rare breadboards and crystal sets in the museum's collection, this Bendix 1949 Catalan radio just happens to be one of the most valuable pieces in our collection. The set was extremely popular in the post-war era, and thus very sought after because of its association with the memories of persons of the "Baby Boom" generation who grew up in the years following World War-II.

A personal recollection from museum founder and chairman John DeMajo:

As a child of that post-war era, I was always impressed by the quality of station break announcements, particularly those of the local stations. Today, we are bombarded with generic station break ID's along the lines of "Q-95FM" "Cool 104" and "Rockin' Oldies 107.3," but back in the days of quality radio, station ID's were spoken by perfectly dictioned studio announcers who emitted phrases along the lines of: "You are tuned to WWL- New Orleans, Loyola University of the South, with studios in the Roosevelt Hotel. Naval Observatory time is 6:PM as we join the Columbia Broadcasting System."

While today's instant-gratification audiences would consider these practices a waste of air time, I am glad that I had the opportunity to come up in an era when big broadcasting conglomerates hadn't yet polluted the air waves with their "one size fits all" radio content. I much prefer those station breaks of old when both networks and local stations took pride in the quality of their product.

 
COMPLETELY RESTORED RARE STEWART-WARNER RADIO
Stewart-Warner model 01-6D radio from the late 1930's. These photos were taken in our shop during restoration of the set. Shots below are of chassis as it was on the bench being serviced, and below that, the finished radio as it sits in our main display gallery.

A personal recollection from museum founder and chairman John DeMajo:

This set has particular significance to me because my grandfather owned an identical set back in the late 1940's. Every day, in the pre-television era, he would fire up the set in the afternoon to listen to Stella Dallas, Gabriel Heatter's commentary on the news, and Sergeant Preston of the Yukon (Challenge Of The Yukon), but his favorite show was One Man's Family, which was at that time an early evening serial that ran for over 30 years on radio.

Although there were a large number of Stewart-Warner sets made with the O1 chassis, this particular Duncan Phyfe design cabinet is quite rare.

 
Tom Thumb table radio by Emerson Electric
 
This Westinghouse WR-12X8 is another pre-war table-top radio made in late 1941 as part of what would have been the 1942 product line. While the sets were introduced and sold in the fall of 1941, they are extremely rare due to the fact that manufacturing of 1942 model radios ceased with the bombing of Pearl Harbor in December of 1941, so only a limited number had been produced and sold.
 
THE STORY OF OUR FAMILY'S FARNSWORTH GK-267 RADIO

A personal recollection from museum founder and chairman John DeMajo:

This is a Farnsworth "Chair side" radio-phono Model GK-267 dating to the late 1930s. My parents' first radio, in our home when I was a child, was an identical set to this one. It was purchased by my grandfather in 1939 and then passed down to my mother and father when they married and moved into their own home at the end of World War II.

In the approximately five years between the time I was born and the purchase of our first television set in the early 1950s, this radio provided our "prime-time" family entertainment each evening between dinner and bedtime. In that pre-television era, we thrilled to programs like Mr. Keene, Dr. Christian, Life With Luigi, The Kraft Music Hall, The FBI in Peace and War, The Beulah Show, and all those great old shows from the late '40s. I credit my love for vintage radios and old radio programs to those formative Post WW-II years spent with my family in front of the "old Farnsworth."
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Farnsworth radios were manufactured by a company founded by scientist and inventor Philo T. Farnsworth. Farnsworth, a graduate of Brigham-Young University, was a noted physicist, and was actually the person who developed the television camera tube and the technology to make fully electronic cathode ray based Television possible. While Farnsworth was more successful in defending his patents than were other early radio pioneers such as Major Edwin Armstrong, many of his 165 patented inventions were constant infringement targets for David Sarnoff and his wealthy RCA empire. Later in his life, Farnsworth moved into the field of nuclear physics, and he is credited with the development of an early nuclear-fission reactor. The photo below shows Farnsworth at work in his laboratory with the development of magnetic deflection of the electron beam in a cathode ray tube.

 
1938 Delco table radio with push-button station selectors
 
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The photo above is of a Philco 40-180 console. This is one of a multitude of console radios made prior to the U.S. involvement in World-War II. It is similar in cabinet design to the Model 39-31 from 1939, but it employs "loctal" tubes instead of the Octal (keyed 8 pin) and 4-6 pin tubes used in earlier models. The radio was generously donated to the Museum Of Yesterday by Mr. and Mrs. Joseph Wall of Richmond, VA.
 
From the 1920's forward, as radio became a fixture in the American home, several companies which operated merchandise outlets unrelated to Radio, began to offer radios made by third-party suppliers. A number of familiar name department stores and auto service companies contracted with radio manufacturers to offer their own branded radio receivers and products. Here is a listing of some of the common brands of third-party marketed home radios sold in the "golden era" of Radio.

RADIO BRAND NAME
COMPANY WHICH MARKETED BRAND
AERIOLA RCA / WESTINGHOUSE
AETNA RADIO WALGREEN DRUG COMPANY
AIR CHIEF FIRESTONE TIRE AND RUBBER CO. STORES
AIRLINE MONTGOMERY WARD DEPARTMENT STORES
DELCO GENERAL MOTORS CORPORATION
GOODYEAR GOODYEAR TIRE AND RUBBER COMPANY
GRANTLINE W.T. GRANT DEPARTMENT STORES
HOTPOINT GENERAL ELECTRIC COMPANY
KNIGHT ALLIED RADIO CORPORATION
PHILCO FORD MOTOR COMPANY
SILVERTONE SEARS-ROEBUCK AND COMPANY
TRUETONE WESTERN AUTO STORES
 
THE STORY OF THE E.H. SCOTT RADIO LABORATORIES
"The Rolls Royce Of Radio"

In most industries in the United States "Industrial Age," one or two companies always prevailed as the largest or the best in the field. For example, despite thousands of companies entering the electrical equipment manufacturing field, none have ever approached the prominence of General Electric or Westinghouse. In the radio manufacturing sector, names came and went from the the days of the crystal set, forward. The philosophy of success also changed with the times. In the height of the Great Depression, Atwater-Kent dominated the field because that company sought to meet the need for a good quality, easy to use yet low cost radio for the home. Despite sounding like a fool-proof approach to radio marketing, Atwater-Kent literally put themselves out of business eventually because they built a radio that never broke down, hence the purchaser was seldom if ever a "return customer." While some manufactures realized this and thus took on a "planned obsolescence" mentality, one company refused to bow to that business ethic.

Ernest Humphrey Scott (1887-1951) was one such entrepreneur. Scott was born in New Zealand, and he came to the United States after World War I. Settling in Chicago, Scott wrote newspaper columns on radio construction. Over the years, he had experimented with thousands of manufacturing methods and technological advances, which gave him a knowledge of radio far beyond the average designer.

Scott designed a receiver in 1924 that proved to have extraordinary sensitivity and noise reduction. He proved this on a trip back to his native New Zealand where he established a dialog with several radio stations in the USA, proving that he could hear their broadcasts almost as local stations. By 1935, Scott had established himself in the radio business as a builder of "custom built" receivers. His radios were recognized as superior to most brands and his customers included such critical listeners as Arturo Toscanini, Frank Lloyd Wright, Guy Lombardo, Walter Winchell, Deems Taylor, Kirsten Flagstad, Jascha Heifetz, Eugene Ormandy, Enzio Pinza, Lily Pons, actor Robert Montgomery, among others.

The 1930s were the best production years for Scott's home receiver market, although his company developed war-time receivers which were purchased by military and shipping interests during World War II because of their low noise and radiation, which made their presence far less traceable by enemy RF scanners. Features of Scott's consumer radios included all chrome plated chassis and components, separate high-fidelity audio amplifiers, theatre grade speaker systems, and careful attention to quality construction, cabinetry, and durability. Like the Rolls-Royce of that era, the E.H. Scott radio was the finest that money could buy. In 1935, at the height of the Great Depression, a Scott receiver sold for an unprecedented $200. By today's currency standards, that would amount to almost $4000. Following World War II, a Scott console home radio retailed for $1500, and today, vintage restored Scott radios have been sold for upwards of $10,000 on the auction market.

Unfortunately, after great success through the 1930's and the War Years, the company began a downward spiral in the late 1940s. By 1950, Mr. Scott had been eased out of his leadership role in the company, and the later sets did not command the public respect that the earlier sets had. Problems were also experienced by customers who attempted to get local repairs, as many of the local service shops around the country, with which Mr. Scott had built relationships over the years, were now moving on to television service, and therefore gave up their exclusive arrangements with the new and more difficult management of the Scott Laboratories firm. It soon became apparent that there was a service and support void in many previously supported markets, which eventually lead to the company's demise.

 

EXCITING ANNOUNCEMENT: The museum has just acquired an E. H. Scott 16-A Metropolitan receiver. It is now undergoing full restoration in our museum restoration shop and will join our permanent display as soon as the restoration is completed. Shown below is the main chassis of the 16-A as it undergoes restoration on our service bench. We have also recently acquired a wartime vintage Scott Maritime radio, which can be seen in our "Military Radios" gallery on page 8 of the communications exhibits.

A personal letter to a potential customer, written in 1935, by E. H. Scott

 
THE GREAT ERA OF NETWORK AM RADIO BROADCASTING
COMES TO AN END
 

The RCA Model 1R81 "GOLDEN THROAT AM-FM RECEIVER, shown above, was one of the last vacuum tube based receivers produced by the prestigious Radio Corporation of America. Following RCA chairman David Sarnoff's successful campaign to have the FCC abandon the 50Mhz FM band, a move intended to destroy Major Edwin Armstrong's hold on the FM patents and spectrum, RCA began to produce a line of high quality AM-FM receivers that utilized the newly allocated 88-108Mhz. band. In that same era, high fidelity, and then Stereophonic broadcasting technology had also been introduced in experimental form, and this new realism of sound that FM's wider bandwidth allowed, prompted radio engineers to anticipate a need for high fidelity audio systems that could reproduce multi-channel sub-carrier signals. The first experimental Stereophonic broadcasts were specially scheduled and highly advertised "simulcasts" between television and FM radio where one channel of the stereo signal would be received by the television, and the opposite channel would be carried by a high-fidelity FM radio station. This further opened the market for these high-end FM table radios with their superior sound.

By the latter half of the 1950s, a revolution in programming was also emerging. The handwriting was on the wall, so to speak, in that the broadcasting industry saw rapidly declining numbers of live network radio listener ship due to the new popularity of Television. At the same time, Bell Laboratories invention of the Transistor, gave promise that vacuum tube based electronic equipment would soon be a thing of the past. Television receiver prices dropped from a thousand dollars in 1948, to a few hundred dollars by the end of the 1950s, so almost every home could afford to have a television receiver. The industry also saw the approach of stereophonic broadcasting, and local stations and networks soon became aware that FM would become primarily a music service, whereas AM radio would be relegated to news, "top 40" disk jockey programs, and eventually talk radio.

It was in this era that NBC introduced it's MONITOR weekend radio service. MONITOR was an experiment intended to appease those avid AM radio listeners who were displeased and disappointed with the recent terminations of network radio shows that they had enjoyed for decades, but more importantly was used to gauge the acceptance of a talk variety format that was far less expensive to produce than the scripted shows it replaced. By 1960, most AM broadcasting originated in local station studios, with a few exceptions such as daily broadcasts of Don McNeill's Breakfast Club, Arthur Godfrey's morning show, a few early evening news casts such as the Lowell Thomas and Bob Considine news shows, and NBC's MONITOR being the final hold-outs that ran well into the 1960s.

To hear a sample of the NBC MONITOR weekend service, .

 
 
 
Did you ever wish that you could listen to those recordings of great authentic old radio shows on your antique radios? Well now you can do just that by building the low power wireless AM broadcast transmitter designed by our founder and chairman. Just click the button below to see a complete step-by-step article on building your own low power AM radio station.
 
 
 
NOVELTY AND TOY RADIOS
 
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Coca-Cola promotional radio from 1930's. Distributed by Point-Of-Sale Company as a dealer quota award.
 
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Charlie McCarthy ventriloquist dummy along with a vintage RCA 44-Junior microphone, related period memorabilia, and an original and fully restored 1930s Majestic Charlie McCarthy novelty collector's radio. Charlie McCarthy, along with his creator, Vaudevillian Edgar Bergen, became popular in the 1930s when they hosted "The Chase and Sanborn Hour," a weekly radio comedy and variety show presented by the makers of Chase and Sanborn Coffee.
 
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RCA Model M-118 automobile / portable radio from the early 1930's
 
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This under-dash automobile radio was sold by Sears-Roebuck & Company as Silvertone Model 528-6293. It is built for 6 volt automobile power, which was the standard battery voltage in most 1950 model cars. It utilizes a mechanical vibrator to produce pulsating (square wave) AC from DC in order to operate a standard power transformer type power supply. The tube line-up was similar to most AC radios of the day, which required that the tubes receive high plate (B+) voltages produced directly from a 6 volt DC power source. Note that this set is identical to the Philco Model CR-2. Undoubtedly, Philco manufactured this set for Sears-Roebuck and Company to market under their own Silvertone brand.
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A personal recollection from Museum of Yesterday chairman John DeMajo:

This 1950s Knight-Kit "Ocean Hopper" three-tube kit receiver from Allied Radio Corporation, Chicago 80, IL, was a gift from my grandfather on my twelfth birthday. My seventh-grade Catholic school teacher at the time, Sister Joseph Louise, had me perform the assembly of the kit as part of a week-long project in science class. After the radio was finished, I spent many satisfying hours listening to the last remaining embers of the big network radio show era. "The Amos n' Andy Music Hall," "Yours Truly-Johnny Dollar," "Suspense," and broadcasts of Jan Garber's orchestra from the Blue Room of the Roosevelt Hotel in New Orleans were the evening's typical program lineup in the late 1950's. My receiving antenna was a long wire that was strung between my mother's back yard clothes poles. It was on this set that I heard the final Amos n' Andy broadcast on CBS the night that Freeman Gosden and Charles Correll officially retired from show business.

This was a sad era for long-time radio listeners as it was the period when the major networks ceased production live radio shows. Radio then became a wasteland of screaming disk jockeys who played phonograph records throughout the broadcast day.
 
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Wurlitzer juke box speaker from late 1930's. 12" electro-dynamic speaker in lighted enclosure
 

This next item is not an authentic antique from the collection. It is a project that the museum put together to illustrate, to our young visitors, what kinds of educational electronic projects were available to kids of the mid 20th Century. We didn't have computers, I-Phones, or video games in those days, but we did have very instructive educational toys. One such toy was a "build-it-yourself" one-tube AM radio kit that was marketed in 1956-57 by the Television service division of Radio Corporation of America. The toy was marketed through the local field technicians who made TV repair house calls in those days. If a tech on a service call stumbled across an inquisitive child who wanted to know more about how the family TV worked, the tech would attempt to sell the parents a "Junior Technician Prep Kit" as it was called.

The one-tube, battery powered working radio came in a cardboard box that doubled as the case for the finished radio. The fully functioning "grid leak detector" circuit was then assembled, by the aspiring young technician, on a provided and pre-drilled piece of masonite peg board, using screws and binding posts in place of soldered connections. "A" and "B" battery power for the operation of the 1T4 vacuum tube as obtained from relatively safe 45 volt and 1.5 volt batteries which were packaged along with the kit.

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Example of an RCA Electronic Prep Kit that recently sold on EBAY

A personal recollection from museum founder and chairman John DeMajo:

As a child, I received one of these Junior Tech Prep Kits thanks to the generosity of my grandmother. Unfortunately, the radio, which I retained and cherished very much, was lost in the Katrina flood of New Orleans in 2005. Recently, I saw a picture of a similar radio and I decided to recreate the set from currently available parts, so that today's visitors could see an example of the educational toys that spurred our interest in electronics and science back in those days of hand-wired vacuum tube radios. Below is my recreation based on the original Prep Kit chassis that I remember.

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For today's radio enthusiast, a lot has been gained over time with the current day ease and availability of modern high-tech electronic equipment. At the same time, much has been lost in that today's hobbyist can no longer build, modify or service the micro-miniature printed circuitry that comprises the heart of today's electronic equipment. Today's youth will never experience the joys of begging junk TV parts from the local tv repair shop in order to build a low-power CW transmitter to get on the air, or the pride that came from building a working radio using your mother's old baking pan as the chassis. The young hams of yesterday, learned electronics from the ground up, by experimenting and building the equipment for their hobby interests. In years past, much of the interest, satisfaction and pride that was Amateur Radio, was a direct result of this spirit of "do-it-yourself ism." Shown below are more mid-century radio "toys" that inspired youngsters to learn electronics.
From the museum's mid-century toy collection, this "Erec-tronic" experimenter's kit, manufactured by toymaker A.C. Gilbert Company, offers the espiring technician or engineer an opportunity to construct several working projects including an A.M. radio and an A.M. broadcast band radio transmitter. A simpler kit along the same lines, shown below, is the crystal set radio offered by REMCO toymakers.
 
 
"RADIO - I Miss You So"
(photo from Google Images)
 
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