Rogers Vacuum Tube Company (formally named Radio Manufacturing Corporation Limited) was founded as the Standard Radio Manufacturing Corporation in 1925 by Edward Rogers (1900–1939) to sell Rogers "Batteryless"

radio Radio is the technology of signaling and communicating using radio waves. Radio waves are electromagnetic waves of frequency between 30 hertz (Hz) and 300 gigahertz (GHz). They are generated by an electronic device called a transm ...

s using

vacuum tube A vacuum tube, electron tube, 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. The type kn ...

technology. It was later renamed Rogers Majestic Corporation Limited when Rogers merged his company with

Majestic Corporation Majestic or The Majestic may refer to: Arts and entertainment Film * ''The Majestic'' (film), a 2001 film starring Jim Carrey * ''Majestic'' (film), a 2002 Indian film * The main antagonist of 50 Cent's 2005 film ''Get Rich or Die Tryin Mus ...

of Chicago in 1928. The new company controlled Rogers Radio Tube Company and Rogers Batteryless Radio Company.

Joseph Elsworth Rogers Joseph is a common male given name, derived from the Hebrew Yosef (יוֹסֵף). "Joseph" is used, along with "Josef", mostly in English, French and partially German languages. This spelling is also found as a variant in the languages of the mo ...

(1898–1960), brother of Edward Rogers, was an important member of the company and served as vice-president until 1939, and then as head from 1939 to 1960. The company founded

Toronto Toronto ( ; or ) is the capital city of the Provinces and territories of Canada, Canadian province of Ontario. With a recorded population of 2,794,356 in 2021, it is the List of the largest municipalities in Canada by population, most pop ...

AM radio station

CFRB CFRB (1010 kHz) is a commercial AM radio station in Toronto, Ontario, Canada. It is owned by Bell Media and carries a News/Talk radio format. Its studios and offices are in the Entertainment District at 250 Richmond Street West. CFRB is a c ...

in order to promote its invention of a

batteryless radio A batteryless radio is a radio receiver which does not require the use of a battery to provide it with electrical power. Originally this referred to units which could be used directly by AC mains supply (mains radio); it can also refer to units ...

receiver, as well as demonstrate the invention of a radio transmitter using batteryless

alternating current Alternating current (AC) is an electric current which periodically reverses direction and changes its magnitude continuously with time in contrast to direct current (DC) which flows only in one direction. Alternating current is the form in which ...

tubes, making CFRB the first all-mains-electric radio station in the world. Edward Rogers died in 1939, and the company was sold in 1941 to Small Electric Motors Ltd. (that became the Canadian division of Dutch giant Royal Philips Electronics), which changed the name of the Rogers Majestic Corporation Limited to Standard Radio Ltd.

Vacuum tubes using alternating current

In 1924, Edward Rogers formed Rogers Radio Ltd of Toronto to manufacture radios. While visiting the United States, he witnessed an experimental tube operating using AC current demonstrated by Frederick S. McCullough. The demonstration proved that an AC operated vacuum tube was feasible, but it exhibited too much hum, due to the filament cycling at the generator frequency. Returning to Canada, Rogers experimented with ways to reduce this hum by redesigning the filament and successfully demonstrating the hum reduction in the fall of 1924. The Standard Radio Manufacturing Corporation was formed in 1925 to mass-produce this new AC operated vacuum tube. Rogers produced and marketed one of the first Canadian and United States AC operated triode vacuum tubes with the production of the Rogers R30 and R32. RCA would market the UX-226 AC triode in September 1926. In 1928, Rogers changed the name from Standard Radio Manufacturing to the Rogers Radio Tube Company Ltd. Rogers by this time had put more emphasis in vacuum tube development and manufacturing over the manufacture and selling of radio sets. During this period, Rogers was in full production of AC operated tetrode tubes similar to the RCA UY-224.

References

{{Reflist
The Life of Edward Samuel Rogers Sr. (1900 - 1939)

Pioneer - Member of CAB Hall of Fame - Rogers, Edward Samuel "Ted" Sr. (1900-1939)

CFRB history
Rogers Communications Electronics companies established in 1925 1925 establishments in Ontario Mass media companies established in 1925 Electronics companies disestablished in 1941 Mass media companies disestablished in 1941 1941 disestablishments in Ontario 1941 mergers and acquisitions History of radio

Vacuum tubes using alternating current

See also

References