Zenith Electronics, LLC, is an American
research and development
Research and development (R&D or R+D), known in some countries as OKB, experiment and design, is the set of innovative activities undertaken by corporations or governments in developing new services or products. R&D constitutes the first stage ...
company that develops
ATSC and
digital rights management
Digital rights management (DRM) is the management of legal access to digital content. Various tools or technological protection measures, such as access control technologies, can restrict the use of proprietary hardware and copyrighted works. DRM ...
technologies. It is owned by the South Korean company
LG Electronics
LG Electronics Inc. () is a South Korean Multinational corporation, multinational major appliance and consumer electronics corporation headquartered in Yeouido-dong, Seoul, South Korea. LG Electronics is a part of LG, LG Corporation, the fourth ...
. Zenith was previously an American brand of consumer electronics, a manufacturer of radio and
television
Television (TV) is a telecommunication medium for transmitting moving images and sound. Additionally, the term can refer to a physical television set rather than the medium of transmission. Television is a mass medium for advertising, ...
receivers and other consumer electronics, and was headquartered in
Glenview, Illinois
Glenview is a village in Cook County, Illinois, United States, approximately northwest of the Chicago Loop. Per the 2020 census, the population was 48,705.
The Village of Glenview is governed by New Trier and Northfield townships. According ...
. After a series of layoffs, the consolidated headquarters moved to
Lincolnshire, Illinois
Lincolnshire is a village in Lake County, Illinois, United States. It is a northern suburb of Chicago. Per the 2020 census, the population was 7,940. Named after Lincolnshire, England, the village was incorporated on August 5, 1957, from the u ...
. For many years, their famous
slogan
A slogan is a memorable motto or phrase used in a clan or a political, commercial, religious, or other context as a repetitive expression of an idea or purpose, with the goal of persuading members of the public or a more defined target group ...
(borrowed from Crown Piano maker George Bent of Chicago, used through the 1890s) was "The quality goes in before the name goes on".
LG Electronics
LG Electronics Inc. () is a South Korean Multinational corporation, multinational major appliance and consumer electronics corporation headquartered in Yeouido-dong, Seoul, South Korea. LG Electronics is a part of LG, LG Corporation, the fourth ...
acquired a controlling share of Zenith in 1995; Zenith became a wholly owned subsidiary in 1999. Zenith was the inventor of
subscription television
Pay television, also known as subscription television, premium television or, when referring to an individual service, a premium channel, refers to subscription-based television services, usually provided by multichannel television providers, b ...
and the modern
remote control
A remote control, also known colloquially as a remote or clicker, is an consumer electronics, electronic device used to operate another device from a distance, usually wirelessly. In consumer electronics, a remote control can be used to operat ...
, and was the first to develop
high-definition television
High-definition television (HDTV) describes a television or video system which provides a substantially higher image resolution than the previous generation of technologies. The term has been used since at least 1933; in more recent times, it ref ...
(HDTV) in
North America
North America is a continent in the Northern Hemisphere, Northern and Western Hemisphere, Western hemispheres. North America is bordered to the north by the Arctic Ocean, to the east by the Atlantic Ocean, to the southeast by South Ameri ...
.
Zenith-branded products were sold in
North America
North America is a continent in the Northern Hemisphere, Northern and Western Hemisphere, Western hemispheres. North America is bordered to the north by the Arctic Ocean, to the east by the Atlantic Ocean, to the southeast by South Ameri ...
,
Germany
Germany, officially the Federal Republic of Germany, is a country in Central Europe. It lies between the Baltic Sea and the North Sea to the north and the Alps to the south. Its sixteen States of Germany, constituent states have a total popu ...
,
Thailand
Thailand, officially the Kingdom of Thailand and historically known as Siam (the official name until 1939), is a country in Southeast Asia on the Mainland Southeast Asia, Indochinese Peninsula. With a population of almost 66 million, it spa ...
(to 1983),
Cambodia
Cambodia, officially the Kingdom of Cambodia, is a country in Southeast Asia on the Mainland Southeast Asia, Indochinese Peninsula. It is bordered by Thailand to the northwest, Laos to the north, and Vietnam to the east, and has a coastline ...
,
Laos
Laos, officially the Lao People's Democratic Republic (LPDR), is the only landlocked country in Southeast Asia. It is bordered by Myanmar and China to the northwest, Vietnam to the east, Cambodia to the southeast, and Thailand to the west and ...
,
Vietnam
Vietnam, officially the Socialist Republic of Vietnam (SRV), is a country at the eastern edge of mainland Southeast Asia, with an area of about and a population of over 100 million, making it the world's List of countries and depende ...
,
India
India, officially the Republic of India, is a country in South Asia. It is the List of countries and dependencies by area, seventh-largest country by area; the List of countries by population (United Nations), most populous country since ...
, and
Myanmar
Myanmar, officially the Republic of the Union of Myanmar; and also referred to as Burma (the official English name until 1989), is a country in northwest Southeast Asia. It is the largest country by area in Mainland Southeast Asia and has ...
.
History
The company was co-founded by Ralph Matthews and Karl Hassel in
Chicago, Illinois
Chicago is the List of municipalities in Illinois, most populous city in the U.S. state of Illinois and in the Midwestern United States. With a population of 2,746,388, as of the 2020 United States census, 2020 census, it is the List of Unite ...
, as Chicago Radio Labs in 1918 as a small producer of
amateur radio
Amateur radio, also known as ham radio, is the use of the radio frequency radio spectrum, spectrum for purposes of non-commercial exchange of messages, wireless experimentation, self-training, private recreation, radiosport, contesting, and emer ...
equipment. The name "Zenith" came from ZN'th, a contraction of its founders'
ham radio
Amateur radio, also known as ham radio, is the use of the radio frequency spectrum for purposes of non-commercial exchange of messages, wireless experimentation, self-training, private recreation, radiosport, contesting, and emergency communi ...
call sign
In broadcasting and radio communications, a call sign (also known as a call name or call letters—and historically as a call signal—or abbreviated as a call) is a unique identifier for a transmitter station. A call sign can be formally as ...
, 9ZN. They were joined in 1921 by
Eugene F. McDonald
Eugene F. McDonald (1886–1958) founded Zenith Electronics Corporation, Zenith Radio in 1921, a major American radio and electronics manufacturer for most of the twentieth century.
Early life
Eugene F. McDonald Jr. was born March 11, 1886, in Sy ...
,
[McMahon, Morgan E. ''A Flick of the Switch 1930–1950'' (Antiques Electronics Supply, 1990), p.187.] and Zenith Radio Company was incorporated in 1923.
The fledgling company soon became known for its high-quality radios and electronic innovations. Zenith introduced the first portable radio in 1924,
the first mass-produced AC radio in 1926, and push-button tuning in 1927.
It added automobile radios in the 1930s with its ''Model 460'', promoting the fact that it needed no separate generator or battery, selling at US$59.95. The first Zenith television set appeared in 1939, with its first commercial sets sold to the public in 1948.
The company is credited with having invented such things as the wireless
remote control
A remote control, also known colloquially as a remote or clicker, is an consumer electronics, electronic device used to operate another device from a distance, usually wirelessly. In consumer electronics, a remote control can be used to operat ...
and FM multiplex
stereo
Stereophonic sound, commonly shortened to stereo, is a method of sound reproduction that recreates a multi-directional, 3-dimensional audible perspective. This is usually achieved by using two independent audio channels through a configurat ...
. For many years Zenith used the slogan "the quality goes in before the name goes on". This phrase was used by the Geo. P. Bent Piano Company of Chicago as early as 1906.
Zenith established one of the first FM stations in the country in 1940 (Chicago's WWZR, later called WEFM, named for Zenith executive Eugene F. McDonald), which was among the earliest FM multiplex stereo stations, first broadcasting in stereo in June 1961. The station was sold in the early 1970s and is now
WUSN
WUSN (99.5 FM) is a country music radio station in Chicago, Illinois. Owned by Audacy, Inc. and branded as "US✶99", it is based at Two Prudential Plaza in the Chicago Loop, Loop, and transmits from atop the John Hancock Center with an HD Ra ...
.
Zenith pioneered the development of high-contrast and flat-face
picture tubes, and the
multichannel television sound
Multichannel Television Sound (MTS) is the method of encoding three additional audio channels into analog 4.5 MHz audio carriers on System M and System N.The system was developed by an industry group known as the Broadcast Television Systems ...
(MTS) stereo system used on analog television broadcasts in the United States and Canada (as opposed to the
BBC
The British Broadcasting Corporation (BBC) is a British public service broadcaster headquartered at Broadcasting House in London, England. Originally established in 1922 as the British Broadcasting Company, it evolved into its current sta ...
-developed
NICAM
Near Instantaneous Companded Audio Multiplex (NICAM) is an early form of lossy compression for digital audio. It was originally developed in the early 1970s for point-to-point links within broadcasting networks.Croll, M.G., Osborne, D.W. and Spi ...
digital stereo sound system for analog television broadcasts, used in many places around the world.) Zenith was one of the first companies to introduce a digital
HDTV
High-definition television (HDTV) describes a television or video system which provides a substantially higher image resolution than the previous generation of technologies. The term has been used since at least 1933; in more recent times, it ref ...
system implementation, parts of which were included in the
ATSC standard, starting with the 1993 model
Grand Alliance. They were one of the first American manufacturers to market a home
VCR, selling a
Sony
is a Japanese multinational conglomerate (company), conglomerate headquartered at Sony City in Minato, Tokyo, Japan. The Sony Group encompasses various businesses, including Sony Corporation (electronics), Sony Semiconductor Solutions (i ...
-built
Betamax
Betamax (also known as Beta, and stylized as the Greek letter Beta, β in its logo) is a discontinued consumer analog Videotape, video cassette recording format developed by Sony. It was one of the main competitors in the videotape format war ag ...
video recorder starting in 1977.
By 1960 Zenith was with
RCA
RCA Corporation was a major American electronics company, which was founded in 1919 as the Radio Corporation of America. It was initially a patent pool, patent trust owned by General Electric (GE), Westinghouse Electric Corporation, Westinghou ...
among the two largest US television manufacturers, each with more than 20% of the market; 25 other companies had the rest of the market. The 1962 Illinois Manufacturers Directory (50th Anniversary edition) lists Zenith Radio Corporation as having 11,000 employees, of which at least 6,460 were employed in seven Chicago plants. The corporate office was in plant number 1, located at 6001 West Dickens Avenue (north of the
Chicago, Milwaukee, St. Paul and Pacific railroad tracks), where 2,500 workers made radio and television sets and Hi-Fi stereophonic phonographs. Plant number 2 was located at 1500 North Kostner Ave., where 2,100 employees made government electronics, radio and television components, transistors and hearing aids. Plant number 3 was located at 5801 West Dickens Ave. (also north of the
Milwaukee Road
The Chicago, Milwaukee, St. Paul and Pacific Railroad (CMStP&P), better known as the Milwaukee Road , was a Class I railroad that operated in the Midwestern United States, Midwest and Pacific Northwest, Northwest of the United States from 1847 ...
tracks), where 300 employees made electronics and did servicing. Plant number 4 was located at 3501 West Potomac Ave., where 60 employees handled warehousing. Plant number 5, located at 6501 West Grand Ave., employed 500-600 workers and manufactured government Hi-Fi equipment.
A subsidiary of Zenith, the Rauland Corporation, located at 4245 North Knox Avenue, employed 850 workers who produced television picture tubes. In the mid '60's, Rauland produced the RCA 21" round color CRT; in 1965 it added a 21" rectangular 21" color CRT. In 1966, Rauland bought the
Keebler
The Keebler Company is an American cookie and former cracker manufacturer. Founded in 1853, it has produced numerous baked snacks, advertised with the Keebler Elves. Keebler had marketed its brands such as Cheez-It (which bear the Sunshine Biscu ...
cookie plant in
Melrose Park, Illinois
Melrose Park is a village in Leyden Township, Cook County, Illinois, Leyden and Proviso Township, Cook County, Illinois, Proviso Townships, Cook County, Illinois, United States. It is a suburb of Chicago. As of the 2020 United States census, 2020 ...
for production of color CRTs. Rauland's
Niles, Illinois
Niles is a village in Cook County, Illinois, United States, located in the townships of Maine Township, Cook County, Illinois, Maine and Niles Township, Cook County, Illinois, Niles, directly neighboring Chicago's far northwest border. Per the 2 ...
, plant made flat-face
radar
Radar is a system that uses radio waves to determine the distance ('' ranging''), direction ( azimuth and elevation angles), and radial velocity of objects relative to the site. It is a radiodetermination method used to detect and track ...
picture tubes,
night vision
Night vision is the ability to see in low-light conditions, either naturally with scotopic vision or through a night-vision device. Night vision requires both sufficient spectral range and sufficient intensity range. Humans have poor night v ...
microchannel image tubes for the military, and many specialty tubes. The other Zenith subsidiary in Chicago was Central Electronics, Incorporated, located at 1247 West Belmont Ave., where 100 employees made amateur radio equipment and performed auditory training. Another Central Electronics plant was located at State Route 133 and Grandview in
Paris, Illinois
Paris is a city in Edgar County, Illinois, south of Chicago and west of Indianapolis. The population was 8,291 at the 2020 census. It is the county seat and largest city in Edgar County, Illinois, Edgar County.
History
Paris was established i ...
, where 500 employees made radio receivers, with the total Zenith work force in Illinois being thus at least 6,960.
In December 1970, National Union Electric ("NUE") sued most of the Japanese television manufacturers for violation of the Anti-
Dumping Act and a conspiracy they alleged violated American antitrust laws.
[Lehr, Jr., Louis A. (2013), Arnstein & Lehr, The First 120 Years, Amazon p. 80] During the pendency of that suit, Zenith Radio Corporation encountered increasing financial difficulty as their market share progressively went to Japanese companies. Zenith joined two other U.S. companies—
Sears, Roebuck and Co. and
Motorola, Inc.—as co-plaintiffs. The NUE suit was transferred to the Eastern District of Pennsylvania, and the two suits were consolidated for pretrial proceedings and trial.
The suit, styled ''In re Japanese Electric Products Antitrust Litigation'', sought $900 million in damages.
By the end of 1983, Zenith had spent millions of dollars in connection with the litigation. In 1981, the trial court entered
summary judgment
In law, a summary judgment, also referred to as judgment as a matter of law or summary disposition, is a Judgment (law), judgment entered by a court for one party and against another party summarily, i.e., without a full Trial (law), trial. Summa ...
on the antitrust and antidumping claims and dismissed the lawsuits. Plaintiffs appealed, and the appellate court affirmed the summary judgment for Sears, Roebuck and Co., Motorola, Inc., and Sony. The case was appealed, and in March 1986 the
Supreme Court of the United States
The Supreme Court of the United States (SCOTUS) is the highest court in the federal judiciary of the United States. It has ultimate appellate jurisdiction over all Federal tribunals in the United States, U.S. federal court cases, and over Stat ...
ruled in favor of the defendants on Zenith's antitrust claims. Zenith's hopes to salvage a victory on the claims that the defendants violated the Antidumping Act of 1916 ended in April 1987, when the Supreme Court refused to hear an appeal from the U.S. District Court of Appeals in Philadelphia that upheld the ruling of the trial court in favor of the Japanese.
In 1979, Zenith entered the computer market with the purchase of
Heath Company
Heathkit is the brand name of kits and other electronic products produced and marketed by the Heath Company. The products over the decades have included electronic test equipment, high fidelity home audio equipment, television receivers, amateu ...
from
Schlumberger
Schlumberger (), doing business as SLB, is a global multinational oilfield services company. Founded in France in 1926, the company is now incorporated as Schlumberger NV in Willemstad, Curaçao, with principal executive offices in Houston ...
for $64.5 million, forming
Zenith Data Systems
Zenith Data Systems Corporation (ZDS) was an American computer systems manufacturing company active from 1979 to 1996. It was originally a division of the Zenith Radio Company (later Zenith Electronics), after they had purchased the Heath Com ...
(ZDS).
The company changed its name to Zenith Electronics Corporation in 1984 to reflect its interests in computers and
CATV
Cable television is a system of delivering television programming to consumers via radio frequency (RF) signals transmitted through coaxial cables, or in more recent systems, light pulses through fibre-optic cables. This contrasts with broadc ...
, having left the radio business two years earlier.
ZDS was very successful.
By the late 1980s its profits were sustaining its parent, while from 1987 Zenith's consumer business lost money. By 1988 the company was the last American television manufacturer, and reportedly decided to also exit the consumer market and sell its television business.
To raise money for HDTV research efforts and reduce debt, Zenith instead sold ZDS to
Groupe Bull
Bull SAS (also known as Groupe Bull, Bull Information Systems, or simply Bull) is a French computer company headquartered in Les Clayes-sous-Bois, in the western suburbs of Paris. The company has also been known at various times as Bull General ...
in October 1989 for $635 million.
By 1990, Zenith was in trouble and looking more attractive to a hostile takeover. To avoid this, Zenith sold a five-percent stake to the Korean company GoldStar (now
LG Electronics
LG Electronics Inc. () is a South Korean Multinational corporation, multinational major appliance and consumer electronics corporation headquartered in Yeouido-dong, Seoul, South Korea. LG Electronics is a part of LG, LG Corporation, the fourth ...
) as part of a technology-sharing agreement. With their analog line aging (the last major update to the line had been the ''System³'' chassis in 1978)), and the adoption of HDTV in the United States decades away, Zenith's prospects were poor.
In 1995 LG, increased its stake to 55 percent, enough to assume
controlling interest
A controlling interest is an ownership interest in a corporation with enough voting stock shares to prevail in any stockholders' motion. A majority of voting shares (over 50%) is always a controlling interest. When a party holds less than the maj ...
. Zenith was too small to compete in the consumer electronics industry, which had become global in nature, and its high-quality products made it attractive for acquisition. Zenith filed for
Chapter 11 bankruptcy
Chapter 11 of the United States Bankruptcy Code ( Title 11 of the United States Code) permits reorganization under the bankruptcy laws of the United States. Such reorganization, known as Chapter 11 bankruptcy, is available to every business, w ...
in 1999, and in exchange for its debts, LG bought the remaining 45 percent of the company, converting about $200 million of debt owed to it by Zenith into common stock in the revamped company. The shares of existing stockholders were rendered worthless.
During this period, some of Zenith's products were being rebadged as
OEM under the
Admiral
Admiral is one of the highest ranks in many navies. In the Commonwealth nations and the United States, a "full" admiral is equivalent to a "full" general in the army or the air force. Admiral is ranked above vice admiral and below admiral of ...
name. Certain products carried the Allegro brand, which had originated in the 1970s as a brand for Zenith speakers and other audio equipment. Their profitable Network Systems division, which produced
set-top box
A set-top box (STB), also known as a cable converter box, cable box, receiver, or simply box, and historically television decoder or a converter, is an information appliance device that generally contains a Tuner (radio)#Television, TV tuner inpu ...
es for
cable and
satellite TV
Satellite television is a service that delivers television programming to viewers by relaying it from a communications satellite orbiting the Earth directly to the viewer's location.ITU Radio Regulations, Section IV. Radio Stations and Systems ...
, was sold to
Motorola
Motorola, Inc. () was an American multinational telecommunications company based in Schaumburg, Illinois. It was founded by brothers Paul and Joseph Galvin in 1928 and had been named Motorola since 1947. Many of Motorola's products had been ...
in the summer of 2000 and became part of Motorola BCS (Broadband Communications Sector).
The Zenith headquarters building was occupied by
Aon and subsequently demolished in 2018 to create room for nearby
Abt Electronics
Abt Electronics is an independent family-owned retailer in the United States of consumer electronics, major appliances, and furniture. Abt operates 880,000 square feet at a single location in Glenview, Illinois, on of land ("... 1,200-emplo ...
to expand.
LG produced the Zenith DTT-900 and Zenith DTT-901
ATSC digital television converter box. LG offered some Zenith-branded plasma, LCD, and direct-view televisions through selected retail outlets.
Notable products
Shortwave radio

Among Zenith's early famous products were the "Royal" series of transistor radios and the "
Trans-Oceanic
The Trans-Oceanic (abbreviated T/O) was a brand of portable radios produced from 1941 to 1981 by Zenith Radio. They were characterized by heavy-duty, high-quality construction and their performance as shortwave receivers.
History
Zenith's founde ...
" series of shortwave portable radios, which were produced from 1942 to 1981.
Subscription television
Zenith was the first company to experiment with subscription television, launching their
Phonevision
Phonevision was a project by Zenith Radio Company to create the world's first pay television system. It was developed and first launched in Chicago, followed by further trials in New York City and Hartford, Connecticut.
History
Zenith had ex ...
system with experimental Chicago station KS2XBS (originally broadcasting on Channel 2 before the
Federal Communications Commission
The Federal Communications Commission (FCC) is an independent agency of the United States government that regulates communications by radio, television, wire, internet, wi-fi, satellite, and cable across the United States. The FCC maintains j ...
forced them to relinquish it to
WBBM-TV
WBBM-TV (channel 2) is a television station in Chicago, Illinois, United States, serving as the market's CBS network outlet. Owned and operated by the network's CBS News and Stations division, the station maintains studios on West Washington St ...
). Their experiment involved a descrambler box mounted on the television set, and plugged into the telephone lead. When a preannounced broadcast was ready to begin, viewers would call an operator at Zenith who would send a signal with the telephone leads to unscramble the video.
["Phonevision" ''Time'' January 8, 1951](_blank)
/ref>
While the Theatre Owners of America claimed the concept was unsuccessful, Zenith itself claimed the experiment was a success.["Report on Phonevision" ''Time'' June 4, 1951](_blank)
/ref> As Phonevision broadcast films, it was seen as a potential competitor for traditional theatres. In spite of the fact that the three films initially available to the first 300 test households were more than two years old, about 18 percent of Phonevision viewers had seen them at the movies, and 92 percent of Phonevision households reported that they would prefer to see films at home.
Remote controls
Zenith is, perhaps, best known for the first practical wireless television remote control
A remote control, also known colloquially as a remote or clicker, is an consumer electronics, electronic device used to operate another device from a distance, usually wirelessly. In consumer electronics, a remote control can be used to operat ...
, the Space Command, developed in 1956.
The original television remote control was a wired version, released in 1950, that soon attracted complaints about an unsightly length of cable from the viewer's chair to the television receiver. Eugene F. McDonald
Eugene F. McDonald (1886–1958) founded Zenith Electronics Corporation, Zenith Radio in 1921, a major American radio and electronics manufacturer for most of the twentieth century.
Early life
Eugene F. McDonald Jr. was born March 11, 1886, in Sy ...
, Zenith President and founder, ordered his engineers to develop a wireless version, but the use of radio waves was soon discounted due to poor interference rejection inherent in 1950s radio receivers. The 1955 Flash-Matic remote system, invented by Eugene Polley
Eugene Polley (November 29, 1915 – May 20, 2012) was an electrical engineer and engineering manager for Zenith Electronics who invented the first wireless remote control for television.
Life and career
Eugene J. Polley was born November 29 ...
, used a highly directional photo flash tube in the hand held unit that was aimed at sensitive photoreceivers in the four front corners of the television cabinet. However, bright sunlight falling on the television was found to activate the controls. These remote controls would activate a motor, causing the tuning dial on the television to switch by itself, and this could be used for mischief if someone else was attempting to tune the television.
Lead engineer Robert Adler
Robert Adler (December 4, 1913 – February 15, 2007) was an Austrian-American inventor who held numerous patents.
He worked for Zenith Electronics, retiring as the company's Vice President and Director of Research. His work included developing ...
then suggested that ultrasonic sound be used as a trigger mechanism. This was produced in the hand held unit by mechanically struck aluminum rods of carefully constructed dimensions—a receiver in the television responded to the different frequencies this action produced. Enough audible noise was produced by pressing the buttons that consumers began calling remote controls "clickers". The miniaturization of electronics meant that, eventually, the sounds were produced in the remote unit electronically; however, the operating principle remained in use until the 1980s, when it was superseded by the infrared light system.
Zenith said that Space Command increased television sales by 40%. The company licensed the technology to RCA and others, and twice successfully sued Admiral for violating its patent. The photograph is of a Space Command 600, which was the remote control designed for use with their color television receivers. The Space Command 600 was introduced in 1965 and this particular design was in use until the end of the 1972 model year. The Space Command 600 remote control had an additional, distinctive feature—this remote control could also adjust color hues. By pressing the mute button on the remote, a relay would be activated at the television in which to transfer the VHF motor drive tuner circuit to the motorized hue control. This would allow the user to adjust the hue in increments by depressing the channel up or down buttons on the remote control, and restore the television to normal tuning operation when the mute button was pressed again (mute off).
Space phone
Some models of Zenith's ''System 3 System 3, System/3 or System III may refer to:
Computing and electronics
*Acorn System 3, a home computer produced by Acorn Computers from 1980
*Cromemco System Three, a home computer produced by Cromemco from 1978
*IBM System/3, a low-end business ...
'' line of televisions made from the late 1970s to the early 1990s had a feature called the Space Phone by Zenith. It was basically a hands-free speakerphone
A speakerphone is a telephone with a microphone and loudspeaker provided separately from those in the handset. This device allows multiple persons to participate in a conversation. The loudspeaker broadcasts the voice or voices of those on the ot ...
built into the television set. It used the set's speaker and remote control, in addition to a built-in microphone. A Space Phone-enabled television would connect to a telephone jack (using a built-in phone cord), and making a call was performed by pressing a button on the remote to activate the Space Phone (which would mute and begin controlling the program audio going to the speaker). The telephone number is dialed using the numeric keys on the remote, which then displays the digits being dialed on-screen (using the on-screen display features of the System 3 line). The user could then converse with another caller hands-free, much like a regular speakerphone.
The porthole television
In the late 1940s, Zenith entered the television market. These sets were all-round tube sets. The main feature was that the entire round screen was exposed. They were available in 12-inch, 16-inch and 19-inch sizes. Later round-tube models had a switch that would show the picture in the 4:3 ratio, or have the entire round screen exposed. These sets are very desirable among television collectors. Many porthole sets used metal-cone CRTs, which are now scarce. It is not uncommon for collectors to replace a bad metal-cone tube with an all-glass tube. Zenith porthole sets came in tabletop models, stand-alone consoles and television/radio/phono combos.
Hand-wired chassis
In the late 1950s, many electronic manufacturers, such as RCA
RCA Corporation was a major American electronics company, which was founded in 1919 as the Radio Corporation of America. It was initially a patent pool, patent trust owned by General Electric (GE), Westinghouse Electric Corporation, Westinghou ...
, General Electric
General Electric Company (GE) was an American Multinational corporation, multinational Conglomerate (company), conglomerate founded in 1892, incorporated in the New York (state), state of New York and headquartered in Boston.
Over the year ...
and Admiral
Admiral is one of the highest ranks in many navies. In the Commonwealth nations and the United States, a "full" admiral is equivalent to a "full" general in the army or the air force. Admiral is ranked above vice admiral and below admiral of ...
, were changing from hand-wired metal chassis in their radios and televisions to printed circuit board
A printed circuit board (PCB), also called printed wiring board (PWB), is a Lamination, laminated sandwich structure of electrical conduction, conductive and Insulator (electricity), insulating layers, each with a pattern of traces, planes ...
s. While circuit boards save time and errors in assembly, they are not well suited for use with vacuum tube
A vacuum tube, electron tube, thermionic valve (British usage), or tube (North America) is a device that controls electric current flow in a high vacuum between electrodes to which an electric voltage, potential difference has been applied. It ...
equipment, in which high temperatures are generated that can break down boards, eventually causing the boards to crumble if one attempts to remove a tube. Zenith, and to a lesser extent Motorola
Motorola, Inc. () was an American multinational telecommunications company based in Schaumburg, Illinois. It was founded by brothers Paul and Joseph Galvin in 1928 and had been named Motorola since 1947. Many of Motorola's products had been ...
, avoided this problem by continuing to use hand wired chassis in all their vacuum tube equipment. Zenith kept circuit boards out of their televisions until the Chromacolor line of the early 1970s, and even then used them only with solid state components, mounting the four tubes used in the Chromacolor "4 tube hybrid" on the steel chassis. Zenith began using circuit boards in radios when they converted to solid-state in the late 1960s, but even Zenith's early transistor radios were completely hand wired with socketed transistors. Due to the use of this chassis construction (and the high quality components), Zenith televisions and radios of the 1950s to 1970s found today are often still working well, needing little work to restore them to like-new operating condition.
See also
* Zenith (disambiguation)
The zenith is the point in the sky that appears directly above the observer.
Zenith or Zénith may also refer to:
*Summit, a point on a surface that is higher in elevation than all points immediately adjacent to it
Automotive
* Zenith Carburett ...
References
External links
*
{{Authority control
1918 establishments in Illinois
1995 mergers and acquisitions
Amateur radio companies
American companies established in 1918
American subsidiaries of foreign companies
Companies based in Lake County, Illinois
Companies that filed for Chapter 11 bankruptcy in 1999
Consumer electronics brands
Electronics companies established in 1918
Electronics companies of the United States
History of radio in the United States
LG Electronics
Melrose Park, Illinois
Radio manufacturers