1600- | | Early History |
1640 | Vacuum Pumps | The first vacuum. Otto von Guericke's air pump |
1643 | Mercury Barometer | The barometer first demonstrated by Evangelista Torricelli |
1654 | Vacuum Pumps | Magdeberg Hemispheres a demonstration of the force of air pressure |
1672 | Air Pumps | Improved air pump and treatise on vacuum experiments published. |
1716 | Pressure explained? | Jacob Hermann suggests that gas pressure is proportional to density and to the square of the average velocity of the gas particles in motion |
1811 | Avogadro's Law | A principle stated in 1811 by the Italian chemist Amedeo Avogadro (1776-1856) that equal volumes of gases at the same temperature and pressure contain the same number of molecules regardless of their chemical nature and physical properties |
1855 | Geissler Tube | Johann Geissler produces a mercury vacuum pump and with it he produces the first good vacuum discharge tubes |
1856 | Gas Properties | Karl Kronig suggests that gas molecules in equilibrium travel in straight lines unless they collide with something |
1858 | Cathode Rays | Julius Plucker demonstrated that magnetic fields bend what later became known as cathode rays. |
1860 | Lamps | Joseph Swann patents the the carbon filament incandescent lamp that operates in a partial vacuum |
1862 | Vacuum Pumps | Geissler-Topler mercury vacuum pump developed |
1865 | Vacuum Pumps | Hermann Sprengel develops the mercury drop pump |
1870 | Vacuum Pumps | Sir William Crookes vacuum pumping system |
1871 | Cathode Rays | C F Varley suggests that cathode rays are particles |
1871 | Cathode Rays | Sir William Crookes advances the idea that cathode rays are negatively charged particles |
1874 | Photo-emission | G R Carey invents the photo-electric cell |
1876 | Gettering | Sir William Crookes demonstrates pumping by chemical getters |
1876 | Vacuum Pumps | L von Babo develops a self-recycling Sprengel vacuum pump |
1876 | Telephone | Alexander Graham Bell invents and demonstrates the telephone |
1877 | Loudspeakers | In Germany on December 14th Ernst Siemens patented the first loudspeaker. |
1879 | Lamps | Thomas A Edison files US patent on high vacuum carbon filament incandescent lamp |
1879 | Cathode Rays | Sir William Crookes develops the Crookes Tube, an early form of cathode ray tube |
1879 | Vacuum Pumps | Edison improves the self-recycling Sprengel-Geissler mercury vacuum pump |
1880 | Vacuum Pumps | Apparatus for evacuating Edison's electric lamps. Based on Crookes design |
1883 | Manufacturer | In May 1883 the American company Western Electric opened a small business in London. This was to become Standard Telephones and Cables (STC) |
1883 | Edison Effect | Thomas A Edison first observes thermionic emission in a vacuum |
1883 | Edison Effect | John Ambrose Fleming presents a paper on the 'molecular shadow' to the Physical Society of London on May 26 |
1883 | Lamps | In October 1883 the amalgamation of Edison Electric Light Co Ltd and Swan Electric Lighting Co to form Edison and Swan United Electric Light Co. Ltd. |
1885 | Edison Effect | Sir William Preece duplicates Edison's experiment, makes quantitative measurements and presents a paper to The Royal Society |
1886 | Positive Ions | Eugen Goldstein observes 'canal' rays (German = Kanalstrahlen). So called because they were emitted through a hole in the cathode. |
1887 | Cathode Rays | Sir William Crookes performs the Maltese Cross experiment |
1889 | Cathode Rays | Jonathan Zenneck improves Braun's CRT and adds time base deflection |
1889 | Valves | The British General Electric Co. Ltd was formed |
1890 | Valves | A C Cossor Ltd was formed. |
1891 | Cathode Rays | George J Stoney suggests the name of electron for cathode ray particles |
1896 | Gettering | Mallgnani Corp demonstrates the use of phosphorus gettering |
1896 | Valves | The British Thomson-Houston Co. Ltd. was formed |
1897 | The Electron | Sir Joseph Thomson discovers 'corpuscles' later called electrons |
1897 | Radio | Guglielmo Marconi sets-up in July 1897 the Wireless Telegraph and Signal Company Limited to commercially exploit his patents |
1898 | Loudspeakers | Sir Oliver Lodge was granted a patent for a loudspeaker on April 27 |
1899 | Valves | The British Westinghouse Electrical and Manufacturing Co. Ltd was formed. This later became the Metropolitan-Vickers Co. Ltd, (Metrovick) |
1900 | Vacuum Pumps | James Dewar builds a cryosorption pump using activated charcoal and liquid air |
1900 | Valves | John Ambrose Fleming becomes scientific adviser to Marconi's company |
1901 | X-Rays | W C Roentgen wins Nobel prize for Physics for discovery of x-rays |
1901 | Radio | Gugliemo Marconi transmits signal from England to North America , and in Marconi's own words. |
1901 | Electron | Richardson produces an equation for the emission of electrons from incandescent metal filaments |
1901 | Lamps | Peter Cooper Hewitt develops the fluorescent lamp |
1901 | Valves | 1901: valves introduced and adverts published. |
1902 | Lamps | Georges Claude builds the first neon lamp |
1902 | Lamps | E Weintraub develops the mercury arc lamp and rectifier |
1902 | Lamps | Charles Proteus Steinmetz files a patent on mercury vapour lamp with halide salts to improve colour |
1902 | Lamps | Peter Cooper Hewitt develops the mercury vapour lamp |
1902 | Cathode Rays | A C Cossor Ltd make the first British examples of Braun's CRT |
1902 | Valves | 1902: valves introduced and adverts published. |
1903 | Cathode Rays | Harris J Ryan builds magnetic deflection CRT's |
1903 | Valves | 1903: valves introduced and adverts published. |
1904 | Cathodes | Arthur Wehnelt publishes details of the oxide coated hot cathode CRT |
1904 | Valves | January 1904, Arthur Wehnelt patents a diode. The patent does not mention use for rectification of RF. The device is described in connection with charging accumulators |
1904 | Valves | October 1904, John Ambrose Fleming produces rectification of RF in a valve. Valve history begins |
1904 | Valves | November 16 1904, John Ambrose Fleming applies for a patent on the Oscillation Valve, later known as the Thermionic Valve and Fleming Diode. |
1904 | Valves | 1904: valves introduced and adverts published. |
1905 | Cathode Rays | Philip Eduard Anton von Lenard wins Physics Nobel prize for Cathode Rays |
1905 | Vacuum Pumps | Wolfgang Gaede makes rotary mercury-sealed mechanical vacuum pump |
1905 | Physics | Albert Einstein explains the photoelectric effect |
1905 | Valves | 1905: valves introduced and adverts published. |
1906 | Vacuum Pumps | W Voege and Rohn build the thermocouple vacuum gauge |
1906 | Valves | Lee de Forest invents the Audion (triode) as a sensitive detector |
1906 | Cathode Rays | Dieckmann, Glage, Rosing, Campbell-Swinton propose the use of the Braun tube to display television images |
1906 | Valves | 1906: valves introduced and adverts published. |
1907 | Valves | 1907: valves introduced and adverts published. |
1908 | Cathodes | Fleming replaces the carbon filament in his valve with a tungsten filament. This is before a process of making ductile tungsten had been devised |
1908 | Valves | 1908: valves introduced and adverts published. |
1909 | Vacuum Pumps | Otto von Baeyer develops the ionisation vacuum gauge |
1909 | Electron | Robert Milikan measures the charge on the electron by the oil drop experiment |
1909 | Radio | Guglielmo Marconi and Carl F Braun win Physics Nobel prize for wireless telegraphy |
1909 | Valves | 1909: valves introduced and adverts published. |
1910 | Vacuum Pumps | Pfeiffer Co produce the rotary oil-sealed mechanical vacuum pump |
1910 | Lamps | Georges Claude demonstrates the neon lamp in public |
1910 | Valves | German telephone relay soft valve by Leiben-Reiz |
1910 | Valves | The early production Audion's looked like this |
1910 | Valves | 1910: valves introduced and adverts published. |
1911 | Radio | Edwin H Armstrong invents the regenerative circuit |
1911 | Radio | 'Doc' Herrold begins first radio broadcast service in San Jose California |
1911 | Radio | Henry Round of the Marconi company commences work on the design of a diode valve |
1911 | Wireless World | First edition of The Marconigraph is published. The name changed to Wireless World in 1913 |
1911 | Valves | 1911: valves introduced and adverts published. |
1912 | Wireless World | Review of 1911 - from Wireless World Golden Jubilee edition April 1961 |
1912 | Wireless World | Synopsis of The Marconigraph - Published as 60 years ago in 1972. |
1912 | Vacuum Pumps | Wolfgang Gaede develops first theory and experiment on the molecular-drag vacuum pump |
1912 | Lamps | Irving Langmuir produces gas filled incandescent lamp |
1912 | Lamps | W D Coolidge introduces a small percentage of Thoria to tungsten power in order to produce ductile tungsten wire for use in G E incandescent lamps. |
1912 | Radio | Lee de Forest makes the first valve amplifier |
1912 | Radio | H M Fassenden develops the Heterodyne receiver |
1912 | Wireless World | Review of 1912 - from Wireless World Golden Jubilee edition April 1961 |
1912 | Valves | 1912: valves introduced and adverts published. |
1913 | Vacuum Pumps | Wolfgang Gaede first diffusion pump using mercury |
1913 | Cathode Rays | A Dufour develops a high voltage, continuously pumped CRT and records directly onto photographic plates |
1913 | Cathode Rays | John Johnson and H J Van der Bijl develop the first commercial CRT. Western Electric 224-A |
1913 | Valves | Marconi receiver with Captain Round's C valve |
1913 | Valves | Captain Round's T transmitting valve developed |
1913 | Valves | Saul Dushman produces a 40 kV vacuum rectifier |
1913 | X-Rays | W D Coolidge produces a High Voltage X-ray tube |
1913 | Wireless World | Review of 1913 - from Wireless World Golden Jubilee edition April 1961 |
1913 | Valves | 1913: valves introduced and adverts published. |
1914 | Valves | ATT purchase licence from de Forest in August 1914 |
1914- | | First World War |
1914 | Valves | Marconi files suit against Lee de Forest over triode |
1914 | Valves | AEG-Telefunken develops standardised valves for radio reception. EVN94 and EVN129 |
1914 | Valves | ATT purchase de Forest's patent for the triode |
1914 | Valves | Irving Langmuir makes a patent application for Electron emission from a thoriated cathode |
1914 | Wireless World | Review of 1914 - from Wireless World Golden Jubilee edition April 1961 |
1914 | Valves | 1914: valves introduced and adverts published. |
1915 | Valves | Edison and Swan Co. produce Round valves for the Marconi Co. |
1915 | Valves | GE in America begin production of Pliotrons (triodes) |
1915 | Valves | In France the first hard vacuum triode was made. During the war over 100,000 were made by the companies Metal and Fotos |
1915 | Cathodes | Western Electric patents the indirectly heated cathode |
1915 | Valves | October 1915 Cunningham develops the tubular Audion |
1915 | Wireless World | Review of 1915 - from Wireless World Golden Jubilee edition April 1961 |
1915 | Valves | 1915: valves introduced and adverts published. |
1916 | Valves | Lee de Forest builds tubular Audions. See DV5 |
1916 | Valves | The White soft valve produced. This has been developed by a British team working at the Cavendish Laboratory under the direction of J J Thomson |
1916 | Valves | Siemens and Halske in Germany develop the Type 'A' vacuum tube. About 50,000 are subsequently made |
1916 | Valves | A British version of the French valve was introduced. This was the R Type |
1916 | Valves | The British Thomson Huston Co. commence making R Type valves for military use |
1916 | Valves | GEC (Osram) commence making R Type valves for military use |
1916 | Vacuum Pumps | Irving Langmuir develops a high-speed diffusion pump and all-metal condensation pump |
1916 | Lamps | The Edison and Swan United Electric Light Co. Ltd. changes name to Edison Swan Electric Co. Ltd. |
1916 | Valves | 1916: valves introduced and adverts published. |
1917 | Valves | The Metropolitan-Vickers Co commences production of the R Type |
1917 | Valves | July 3rd 1917, F Lowenstein's patent for negative bias |
1917 | Valves | 1917: valves introduced and adverts published. |
1918 | Valves | 1918: valves introduced and adverts published. |
1919 | Valves | October 1919. Marconi and GEC set up a joint company to manufacture valves. This was the Marconi-Osram Valve Co. Ltd. Later known as M-OV |
1919 | Wireless World | Review of 1919 - from Wireless World Golden Jubilee edition April 1961 |
1919 | Valves | 1919: valves introduced and adverts published. |
1919 | Computing | The Eccles-Jordan Flip-Flop circuit was first described. |
1920 | Valves | In September Capt. S R Mullard forms the Mullard Radio Valve Co. Ltd. |
1920 | Radio | Edwin Howard Armstrong invents the superhet receiver in the USA and M Lucien Levy does the same in France. |
1920 | Radio | The Daily Mail is the first London newspaper to receive a message by wireless. |
1920 | Radio | The Submarine's Wireless. |
1920 | Cathodes | Irving Langmuir develops the thoriated tungsten filament |
1920 | Vacuum Pumps | Wolfgang Gaede develops the box pump |
1920 | Wireless World | Review of 1920 - from Wireless World Golden Jubilee edition April 1961 |
1920 | Valves | 1920: valves introduced and adverts published. |
1921 | Physics | Albert Einstein is awarded the physics Nobel prize for the photoelectric effect |
1921 | Wireless World | Review of 1921 - from Wireless World Golden Jubilee edition April 1961 |
1921 | Valves | 1921: valves introduced and adverts published. |
1922 | Valves | Mullard introduce the ORA general purpose valve |
1922 | Valves | Cossor introduce the P1 its first valve design post WW1. The electrode shapes avoided patents held by others |
1922 | Physics | For and Against the Ether - Sir Oliver Lodge. |
1922 | Radio | Popular Wireless has Sir Arthur Conan Doyle on front cover |
1922 | Radio | The Marconi experimental station 2MT Writtle. This station was known affectionately as Two Emma Toc after the phonetics of the day. |
1922 | Radio | Broadcasting - Its inception and management - Sir William Noble's view. |
1922 | Radio | 18th October the British Broadcasting Company was formed. |
1922 | Radio | On the 14th Novenber 1922 the BBC went on the air from 2LO in London. |
1922 | Radio | 15th November the 5IT and 2ZY BBC transmitters commenced broadcasting from Birmingham and Manchester respectively. |
1922 | Wireless World | Review of 1922 - from Wireless World Golden Jubilee edition April 1961 |
1922 | Valves | 1922: valves introduced and adverts published. |
1923 | Physics | Robert A Milikan is awarded the physics Nobel prize for measuring the charge on the electron |
1923 | Valves | Cossor valve patent 197853 to W R Bullimore. Arched filament, arched grid with flattened sides, anode also with flattened sides. All electrodes held from stem. |
1923 | Valves | Marconi v Mullard patent dispute at the Court of Appeal. Today it is a rather rare occurrence for patent attorneys to have to try a case in court. Unlike the best criminal defense attorney Dayton Ohio who spends a great deal of time in the courtroom, a patent attorney spends most of the time in research libraries and patent offices. |
1923 | Valves | Demonstration of cathode-ray oscillograph. |
1923 | Valves | Lee de Forest introduces DV/DL tubular Audions. See DV5 |
1923 | Valves | M-OV introduce Captain Round's DEQ high impedance detector |
1923 | Wireless World | Review of 1923 - from Wireless World Golden Jubilee edition April 1961 |
1923 | Wireless Weekly | Sterling Wireless advert with typical domestic scene? |
1923 | Valves | 1923: valves introduced and adverts published. |
1924 | Loudspeakers | In America researchers Chester Rice and Edward Kellogg, working for General Electric, patented the moving coil loudspeaker |
1924 | Cathode Rays | L T Jones and H G Tasker demonstrate electrostatic focusing of a CRT with magnetic deflection |
1924 | Physics | Lisa Meitner of Germany discovers the radiationless electron transition known as the Auger effect. Named after Pierre Auger of France who discovered the effect in 1926. See Augetron |
1924 | Valve Repair | Revalco advert from April 9. |
1924 | Radio | Time signals first broadcast: Greenwich from 5th Februry and Big Ben from 17th February. |
1924 | Radio | Music and the 'Middlebrow'. A commentary on the music on the BBC. |
1924 | Wireless Weekly | C valves available as Government Surplus |
1924 | Wireless World | Review of 1924 - from Wireless World Golden Jubilee edition April 1961 |
1924 | Valves | BTH Granted an Injunction |
1924 | Valves | House of Lords judgement in Mullard v Marconi's Wireless Telegraph Co. |
1924 | Valves | Early Triode Valves |
1924 | Valves | 1924: valves introduced and adverts published. |
1925 | Valves | Bakelite based valves with the evacuation 'pip' concealed within were introduced |
1925 | Television | First public demonstrations of television by John Logie Baird from the first floor of Selfridges Store on Wednesday 1st April. |
1925 | Stereophony | Capt. H J Round comments in 1958 on 1920's stereophony experiments. |
1925 | Wireless World | Review of 1925 - from Wireless World Golden Jubilee edition April 1961 |
1925 | Valves | 1925: valves introduced and adverts published. |
1926 | Loudspeakers | Radiola moving coil loudspeakers, designed by Rice and Kellogg were first sold to consumers |
1926 | Valves | Mullard introduce the first series of their PM valves. See The Azide Process |
1926 | Valves | Loewe vacuum 'integrated circuit' multi valves introduced |
1926 | Television | Farnsworth image dissector produced |
1926 | Vacuum Pumps | M Siegbahn introduces the disk type of molecular drag pump |
1926 | Wireless World | Review of 1926 - from Wireless World Golden Jubilee edition April 1961 |
1926 | Valves | 1926: valves introduced and adverts published. |
1927 | Television | Philo T Farnsworth demonstrates an all-electronic television system in San Francisco |
1927 | Television | Kenjiro Takayanagi demonstrates a gas focused oscillograph CRT to display television images |
1927 | Valves | In the UK the S625 the world's first screened grid valve is produced |
1927 | Valves | In the UK M-OV introduced the KL1. This was the first indirectly heated production valve and paved the way for all mains sets. |
1927 | Valves | May 1927, the landmark UX280 rectifier was introduced. This was subsequently manufactured for over 50 years |
1927 | Amplifiers | Harold S Black discovers the benefits of negative feedback |
1927 | Valves | Albert W Hull builds the first Thyratron |
1927 | Lamps | Friedrich Meyer, Hans J Spanner and Edmund Germer, in Germany, patent the high-pressure metal vapour UV and fluorescent lamp |
1927 | Wireless World | Review of 1927 - from Wireless World Golden Jubilee edition April 1961 |
1927 | Valves | 1927: valves introduced and adverts published. |
1928 | Television | Television the world's first television journal. |
1928 | Wireless Components | Mullard introduce a new Audio Transformer. |
1928 | Social Comment | A cartoon of the time illustrates those 'enjoying' the wireless hobby, as does this one. |
1928 | Home Entertainment | Lissen introduce a Pick-up adaptor to allow a wind-up gramophone to feed a valve amplifier. Plus components advert. |
1928 | Home Entertainment | S G Brown also introduce a Pick-up adaptor as do Amplion - two well respected manufacturers. |
1928 | Home Entertainment | The introduction of the electric gramophone - but with a conventional acoustic sound box as well. |
1928 | Home Entertainment | Advert for Magnavox Loud Speakers - the moving coil speaker. Also BTH Rice-Kellog Speakers advert. |
1928 | Home Entertainment | Amplion Reed Loud Speaker - At this time the moving coil speaker was expensive in price and power. |
1928 | Music | Professor Theremin in London. |
1928 | Valves | The B5 base was introduced |
1928 | Valves | The Mullard company introduce the first Pentode to the UK market |
1928 | Transmitter | Marconi 3 kW aerodrome ground transmitter at Croydon. |
1928 | Wireless World | Review of 1928 - from Wireless World Golden Jubilee edition April 1961 |
1928 | Valves | 1928: valves introduced and adverts published. |
1929 | Vacuum Pumps | Kenneth C D Hickman develops low vapour pressure synthetic oils |
1929 | Vacuum Pumps | Cecil R Burch produces a gas diffusion pump employing low vapour pressure oils |
1929 | Litigation | Loudspeakers in the Law Courts. Patent infringement? |
1929 | Radio | Complete amateur radio station with one valve transmitter and one valve receiver |
1929 | Radio | Pioneers of Wireless. A lecture by Dr W H Eccles FRS |
1929 | Television | On 20th August the first experimental 30 line television pictures from Baird's studio were broadcast. |
1929 | Television | Manfred von Ardenne demonstrates an all-electronic television in Berlin. |
1929 | Valves | Farnsworth electron multiplier developed |
1929 | Television | Vladimir K Zworykin files a patent on the kinescope. Zworykin later developed the Iconoscope camera tube |
1929 | Wireless World | Review of 1929 - from Wireless World Golden Jubilee edition April 1961 |
1929 | Wireless World | Valves at Olympia - from Wireless World September 18th 1929. |
1929 | Valves | 1929: valves introduced and adverts published. |
1930 | Valves | The Mazda AC/Pen, introduced in 1930, was the first technically successful indirectly-heated power pentode capable of enough output to drive a moving-coil loudspeaker at good volume |
1930 | Wireless World | Review of 1930 - from Wireless World Golden Jubilee edition April 1961 |
1930 | Broadcasting | Centralisation, Alternative Programmes and Something Personal. Reith on BBC policy in 1930. |
1930 | Broadcasting | The wireless set of the future. |
1930 | Valves | Changing burnt-out filaments. |
1930 | Valves | Valves for Your Set, types available and suitable use. |
1930 | Television | Television in America |
1930 | Valves | 1930: valves introduced and adverts published. |
1931 | Valves | The external metalising of valves was introduced. Generally the metal-loaded paint was coloured Red, Gold or Grey. |
1931 | Valves | New American Screen-Grid Valves. The variable mu tetrode. |
1931 | Valves | National Union in the USA produce the first valves for car radios |
1931 | Radio | The July, 1931 issue of Radio News in America has the De Forest 451 advert and compares the 'old' Type 24 with the Vari-mu 51 |
1931 | Valves | World's biggest valve |
1931 | Valves | Raycraft photocell and Experiments with Light Control article. |
1931 | Test Gear | Pifco Radiometer advert and a surviving meter. |
1931 | Wireless World | Review of 1931 - from Wireless World Golden Jubilee edition April 1961 |
1931 | Valves | 1931: valves introduced and adverts published. |
1932 | Radio | On 12th March, Broadcasting House in London made its first transmission. |
1932 | Radio | Exide HT accumulators advert. |
1932 | Audio | The 'Primustatic' Loud Speaker - an electrostatic speaker. |
1932 | Television | Alan B Du Mont starts to apply CRT's to television. |
1932 | Television | New television System - variable speed scanning. |
1932 | Film | The 'Talkatome' sound for home movies. |
1932 | Radio | Short Wave broadcasts to the British Empire started from the Daventry transmitter on 19th December. |
1932 | Radio | Testing Superhets with Cathode Ray The operator adjusts the IF transformers with a viaual display. |
1932 | Valves | Valves at Radiolympia and This Seasons Valves |
1932 | Valves | New ETA SG Valve |
1932 | Valves | A Selection of Valve Boxes |
1932 | Test Equipment | Meter Sensitivity - The Avo meter. |
1932 | Wireless World | 21 Years Since The Wireless World Began - from Wireless World April27, 1932. |
1932 | Quiescent Push-Pull | Quiescent Push-Pull started to appear in designs from the end of 1932. |
1932 | Wireless World | Review of 1932 - from Wireless World Golden Jubilee edition April 1961. |
1932 | Valves | 1932: valves introduced and adverts published. |
1933 | Electric Piano | Keyboard and Loudspeaker - the Neo-Bechstein. |
1933 | Valves | The B7 base was introduced. |
1933 | Valves | Westinghouse introduce a mercury-arc rectifier, the Ignitron. |
1933 | Valves | High Vacuum Valves a report on Hivac valves. |
1933 | Valves | Recent Valve Developments |
1933 | Valves | The Latest Valves |
1933 | Valves | Ferranti D4 and LP4 |
1933 | Audio | Parmeko 25-Watt Amplifier Kit. |
1933 | Radio | Pye portable receiver. |
1933 | Radio | The Death Ray what Marconi says. |
1933 | Radio | E H Armstrong announces frequency modulation |
1933 | Radio | Behind the Scenes of the Radio Industry some factory images. |
1933 | Radio | The Pifco Radiometer advert |
1933 | Radio | Ultra Short-Wave Record, Snowdon on 5 Metres. |
1933 | Radio | Fog Landing by Wireless. |
1933 | Radio | Celestion Speaker and Class B amplifier. |
1933 | Microwaves | Beamcasting |
1933 | Valves | Short Wave Valves. The acorn valve. |
1933 | Wireless World | Review of 1933 - from Wireless World Golden Jubilee edition April 1961 |
1933 | Television | Television Explained |
1933 | Radio | The RGD Radio-gram advert |
1933 | Radio | Budapest Tomorrow A new transmitter and interesting mast. |
1933 | Radio | Thermo Superjet Three A gas powered radio!. |
1933 | Valves | New Hivac Valves |
1933 | Valves | Valves at Olympia. Review of the show and The New Valves - multi-electrode valves |
1933 | Valves | 1933: valves introduced and adverts published. |
1934 | Audio Recording | Abbey Road Studios. Behind the scenes at the HMV recording studios. |
1934 | Valves | Multiple Valves. Are they worthwhile asks this editorial. |
1934 | Valves | The B9 base was introduced |
1934 | Valves | In the USA the 6.3 Volt filament is adopted as standard for both AC and DC filaments and heaters |
1934 | Valves | The GE 6E5 'Magic Eye' tuning indicator is introduced. RCA produce 6E5 in 1935 |
1934 | Valves | The introduction of miniature Acorn valves for VHF. See 955 |
1934 | Valves | In the UK M-OV introduced the Catkin range of valves with external anodes |
1934 | Valves | Valves at Olympia. A report on the show. |
1934 | Radio | E H Armstrong announces frequency modulation |
1934 | Radio | Radio Assembly 1930s Style. |
1934 | Radio | Centi-metre-wave Transmitter. |
1934 | Radio | Ferranti Arcadia Advert. Advertising with gender stereotypes. |
1934 | Radio | New Droitwich Transmitter. |
1934 | Radio | Straight HF v The Superheterodyne. |
1934 | Radio | Philco Shadow Tuning Meter. |
1934 | Wireless World | Review of 1934 - from Wireless World Golden Jubilee edition April 1961 |
1934 | Wireless World | The Quality Loud Speaker High flux density in a gap of generous diameter. |
1934 | Wireless World | Valve Design Trends Introduction to the 1934 Valve Supplement |
1934 | Wireless World | Editorial. Television: the BBC's responsibility. |
1934 | Wireless World | HMV Recording Studios. Behind the scenes at Abbey Road. |
1934 | Wireless World | Time by Telephone. The speaking clock in Paris. |
1934 | Valves | 1934: valves introduced and adverts published. |
1935 | Vacuum Pumps | Wolfgang Gaede produces the gas ballast pump |
1935 | Vacuum Pumps | Kenneth C D Hickman produces a fractionating oil diffusion pump and associated oils |
1935 | Valves | RCA introduce the IO base with the launch of the metal tube valve 6L7 |
1935 | Valves | J H Owen Harries establishes Harries Thermoinics Ltd to licence his output valve design to valve makers. |
1935 | Valves | 326 Valves introduce the PX50 triode. |
1935 | Valves | RCA nine original valves appear in the RCA metal valve family |
1935 | Radar | Watson Watt demonstrates that aircraft reflect radio waves |
1935 | Radar | Radar Pre-History details published in 1945 of the 1935 French 'Obsticle Detector'. |
1935 | Television | Television Committee Report - Technical Summary. |
1935 | Television | Finding a Home for London's Television Station. |
1935 | Television | Television Demonstrations - 30-lines on CRT. |
1935 | Television | German Telefunken - Karolus television with 10,000 pixels. |
1935 | Television | Magnifying the television image - with X-Rays. |
1935 | Industrial Electronics | The CRT in the motor industry. |
1935 | Transistor | Oskar Heil patents the field effect transistor. The device, however, did not work |
1935 | Wireless World | Review of 1935 - from Wireless World Golden Jubilee edition April 1961 |
1935 | Valves | Marconi and Osram N41 and Marconi and Osram DN41 output valves. |
1935 | Valves | 1935: valves introduced and adverts published. |
1936 | Television | Monday November 2nd. The BBC begins broadcasting from Alexandra Palace transmitter to the London area (Baird system and Marconi-EMI system on alternate weeks). |
1936 | Valves | Taking the control grid to a top cap was becoming popular. Triodes as well as other types. |
1936 | Valves | Mahn and Mecalf present a paper on velocity modulated valves. The key principle within the klystron |
1936 | Audio Amplifier | Hartley Turner Amplifier - An inexpensive 12 Watt push-pull PX25 amplifier reviewed by Wireless World. |
1936 | Amateur Radio | G5VS - An ambitious amateur radio station. |
1936 | Wireless World | Review of 1936 - from Wireless World Golden Jubilee edition April 1961 |
1936 | Valves | BVA Notice Manufacturers valves are not to be sold as Retail Valves |
1936 | Valves | Adverts show screw top caps as old and metal 'top hat' caps as new. |
1936 | Valves | 1936: valves introduced and adverts published. |
1937 | Computer | Publication of Alan Turing's 1936 paper 'On computable numbers, with an application to the Entscheidungsproblem' that introduced the concept of a universal computing machine. This work presented the theoretical basis for the stored-programme computer. |
1937 | Valves | At Stanford University the Varian brothers produce the first working Klystron |
1937 | Valves | New Valves? When replacement is due |
1937 | Television | The BBC stop using the Baird system on 4th February in favour of the EMI all electronic 405 line system. |
1937 | Television | A television outside broadcast van was used for the first time on 12th May. The event was the coronation of King George VI and Queen Elizabeth. |
1937 | Vacuum Pumps | C M Van Alta produces a diffusion pump with a pumping rate in excess of 100 litres per second |
1937 | Vacuum Pumps | L Malter demonstrates a multi-stage, self fractionating diffusion pump |
1937 | Wireless World | Review of 1937 - from Wireless World Golden Jubilee edition April 1961 |
1937 | Valves | 1937: valves introduced and adverts published. |
1938 | Broadcasting | Can Broadcasting Prevent War?. |
1938 | Broadcasting | American Facsimile. Newspapers printed in the home. |
1938 | Valves | Mazda introduce the MO in the UK as an alternative to the International Octal |
1938 | Valves | New AVO Valve Tester |
1938 | Wireless World | Review of 1938 - from Wireless World Golden Jubilee edition April 1961 |
1938 | Valves | HMV Table Television Model 904 |
1938 | Valves | Two reports about the valves at Radiolympia. August 25th and September 1st. Some overlap naturally exists. |
1938 | Valves | 1938: valves introduced and adverts published. |
1939 | National Service | The Wireless Register The UK Government looking at the human resources available in case of war |
1939 | Television | RCA and Du Mont demonstrate Television at the NY World's Fair |
1939 | Valves | The Loctal or B8B was introduced in America |
1939 | Valves | The Philips introduce the all glass valve and with it the B9G base |
1939 | Valves | The first all-glass valve for use above 30 MHz was produced. The EF50 played a major part in early Radar |
1939 | Valves | High-power Air-cooled Valves. Accelerating heat dissipation with forced air. |
1939 | Valves | Demountable triodes. High power valves. |
1939 | Valves | New CRTs. First appearance of post deflection acceleration. |
1939 | Valves | Light Amplifier. |
1939 | War Profit | Blackout. Breaking HT batteries for torch cells. |
1939 | Television | New TV sets at Radiolympia. On 1st September the Government closed down UK Television broadcasting. |
1939 | Radio | On 1st September the Home Service was formed as the national network and incorporated all regional services. |
1939 | Wireless World | Review of 1939 - from Wireless World Golden Jubilee edition April 1961 |
1939 | Valves | 1939: valves introduced and adverts published. |
1940- | | Second World War |
1940 | Valves | February 21st 1940 John Randall and Harry Boot make operational the cavity magnetron at Birmingham University |
1940 | Radar | On September 6th 1940 Sir Henry Tizard takes the cavity magnetron to the USA. This is one of the most secret inventions of the war |
1940 | Radar | In September 1940 the first RDF system using a cavity magnetron is made in the UK |
1940 | Valves | Generating Centimetre Waves. A design by STC in 1937 published in June 1940. |
1940 | Valves | Valve Construction. A pressed glass base announced by Sylvania in 1937 published in June 1940. |
1940 | Valves | In the USA the first all glass B7G 1.4 Volt miniature valves are introduced. These were the 1R5, 1T4, 1S5 and 1S4 |
1940 | Obituary | Sir Oliver Lodge. |
1940 | Wireless World | Review of 1940 - from Wireless World Golden Jubilee edition April 1961 |
1940 | Valves | 1940: valves introduced and adverts published. |
1941 | Television | In America the 525 line system is approved by the FCC for commercial black and white broadcasting |
1941 | Radio | A UHF oscillator is made using Acorn valves. See 955 |
1941 | Culture? | An extract from the 'Free Grid' column of Wireless World that we would find appalling in the 21st century. |
1941 | Valves | The UK government introduce the common valve (CV) lists to streamline procurement and increase flexibility in sourcing the valves required by all branches of government especially the military |
1941 | Valves | The B7G all-glass valve base was introduced in America. Its commercial introduction to the UK was in 1947 but was used for military valves during WWII |
1941 | Valves | The CV35 Reflex Klystron Oscillator was developed at Cambridge by a team under Sir Mark Oliphant. |
1941 | Appeal | Lord Hankey's Appeal to the UK radio trades. |
1941 | Valves | 1941: valves introduced and adverts published. |
1942 | Valves | Marconi Microwave Oscillator from 1939 published in August 1942. |
1942 | Valves | Rudi Kompfner at Oxford University produces the first travelling wave tube |
1942 | Television | Intensifying Television Pictures. The iconoscope as a basis for a DLP projector? |
1942 | Training | Wren Radio Mechanics. Three year course in 16 weeks. See update in 1943. |
1942 | Space Communication | Views on Interplanetary Communication. |
1942 | Valves | 1942: valves introduced and adverts published. |
1943 | Computer | Dr Tommy Flowers builds the first electronic computer for code breaking at Bletchley Park |
1943 | Television | A colour television development by John Logie Baird. |
1943 | Television | Television Receivers A novel projection method. |
1943 | Television | Philips describe television projection principles. Later to be used with the MW6-2 CRT. |
1943 | Broadcasting | High Fidelity. HI-fi audio with TV transmitters? |
1943 | Valves | Percy Spencer of the Raytheon Co designs the laminated anode cavity magnetron which increased production rates |
1943 | Valves | Resonator Valves. Increasing the output of velocity modulated oscillators. |
1943 | Valves | Electron-Beam Modulators. Another use of velocity modulation. |
1943 | Valves | Television Projection. Philips approach to projection TV. |
1943 | Valve History | Early complex valves and why they developed |
1943 | Valve Bases | Belling & Lee advert for valve bases |
1943 | Recorded Music | The Wireless World Brains Trust debate the future of disc recording. |
1943 | Valves | 1943: valves introduced and adverts published. |
1944 | Television | The Baird 'Telechrome'. The world's first Colour TV and Stereo TV CRT. |
1942 | Training | Wren Radio Mechanics. Maintaining Naval Air Arm equipment. See original 1942 article. |
1944 | Valves | Improved Pentagrid. |
1944 | Valves | 1944: valves introduced and adverts published. |
1945- | | Post War developments |
1945 | Valves | Double triodes 6SN7 and 7F8 are introduced |
1945 | Obituary | Sir John Ambrose Fleming. |
1945 | Radio | 29th July saw the reintroduction of regional broadcasting and the formation of the Light Programme. |
1945 | Television | Mid year the future of television in the UK was subject of a government report, plus Wireless World editorial, Television Standards, Definition in the Cinema and Colour TV? |
1945 | Wireless World | Review of 1945 - from Wireless World Golden Jubilee edition April 1961 |
1945 | Valves | Valves in the Services CV valves and nearest commercial equivalents. |
1945 | Microwave Link | Army No. 10 Set Centremetre waves, pulse modulation and multi channel. |
1945 | Valves | 1945: valves introduced and adverts published. |
1946 | Wireless World | Signals From the Sun The 'hiss' phenomenon on Short Waves |
1946 | Wireless World | Valve Standardisation BVA moves towards standard bases and open design specifications |
1946 | Wireless World | American VT equivalents American Service Valve Equivalents |
1946 | Wireless World | Review of 1946 - from Wireless World Golden Jubilee edition April 1961 |
1946 | Valves | 1946: valves introduced and adverts published. |
1947 | Transistor | Bardeen, Brattain and Shockley demonstrate the first semiconductor amplifier |
1947 | Valves | The B8A 'Rimlock' valve base is introduced |
1947 | Valves | B8B 'Loctal' used on UK made valves for the first time |
1947 | Valves | B7G used on UK valves for the first time |
1947 | Valves | Velocity-modulated electron multiplier an STC development |
1947 | Valves | Valves at the Physical Society's Exhibition |
1947 | Valves | 40 Years After the application by De Forest for a patent for a third electrode |
1947 | Valves | New Receiving Valves Mazda and Mullard ranges |
1947 | Valves | SW Oscillator. Space charge correction in velocity modulated oscillator |
1947 | Wireless World | DC defence League - an insight to the pre-universal AC mains era in Great Britain |
1947 | Wireless World | Review of 1947 - from Wireless World Golden Jubilee edition April 1961 |
1947 | Wireless World | Hopes for the National Radio Exhibition at Olympia in 1947 |
1947 | Radar | Radial Time Bases How they were developed for Radar. |
1947 | Wireless World | Review of valves shown at the National Radio Exhibition at Olympia October 1947 |
1947 | Valves | 1947: valves introduced and adverts published. |
1948 | Computer | F C Williams describes the use of a CRT as a digital memory. |
1948 | Computer | 21 June. The Manchester Small-Scale Experimental Machine (SSEM, nicknamed Baby), the first stored-programme computer, runs its first programme. |
1948 | Valves | B9A based all glass double triodes 12AU7, 12AX7 and 12AT7 are introduced |
1948 | Valves | Mullard announce five new AC/DC valves |
1948 | Printed Circuits | Printed Circuits printed wiring using silver loaded colloids |
1948 | Wireless World | Ex-service CRTs more information on these tubes, uses and connections |
1948 | Wireless World | Review of 1948 - from Wireless World Golden Jubilee edition April 1961 |
1948 | Television | The Pye B18T chassis uses lots of EF50's and is the UKs first transformerless set |
1948 | Valves | 1948: valves introduced and adverts published. |
1949 | Computer | Valve memory is introduced |
1949 | Wireless World | Review of 1949 - from Wireless World Golden Jubilee edition April 1961 |
1949 | Radio | Possibly the world's first radio microphone |
1949 | Valves | In 1949 the British Valve industry produced 19 million valves and 310,000 CRTs. |
1949 | Valves | Philips published details of valve developments made in 1940-19424111. D series, E series and U series. Plus the all-glass valves. |
1949 | Valves | 1949: valves introduced and adverts published. |
1950 | Transistor | October 3rd 1950 the transistor is patented |
1950 | Television | Premier Radio VCR97 based UK Television Receiver |
1950 | Television | RCA demonstrate the shadow mask colour TV tube |
1950 | Television | Review of Philips Projection Television |
1950 | Sound Reproduction | The LP is introduced |
1950 | Wireless World | Review of 1950 - from Wireless World Golden Jubilee edition April 1961 |
1950 | Valves | Valves at the 1950 Radio Exhibition |
1950 | Computing | Pilot ACE the NPL computer |
1950 | Valves | 1950: valves introduced and adverts published. |
1951 | Wireless World | Review of 1951 - from Wireless World Golden Jubilee edition April 1961 |
1951 | Audio | QUAD 1 The first appearance of the QUAD line of amplifiers. |
1951 | Television | Barrel Vision Unusual homemade UK Television Receiver |
1951 | Valves | 1951: valves introduced and adverts published. |
1952 | Gettering | Ring getter with U-shaped cross section for valve manufacture is introduced |
1952 | Wireless World | Review of 1952 - from Wireless World Golden Jubilee edition April 1961 |
1952 | Audio | Advert by the Acoustical Manufacturing Co Ltd for the Q.U.A.D amplifier. |
1952 | Valves | Valves at the Radio Exhibition. |
1952 | Valves | November - New Videcon Camera Tube |
1952 | Valves | December - New valves from Mullard |
1952 | Valves | 1952: valves introduced and adverts published. |
1953 | People | Armstrong Award for Capt. Round |
1953 | People | Victorian Wireless Engineer Andrew Gray |
1953 | Television | The Television Society Starts Experimental 625-Line Transmissions. |
1953 | Television | Television chassis advert - with six inch VCR97 green tube. |
1953 | Television | Television chassis advert - with 15 inch tube! |
1953 | Valves | B8A 'Rimlock' valves of all glass construction are introduced in the UK |
1953 | Valves | Valves at the 1953 Radio Exhibition |
1953 | Printed Circuits | Cellular Circuits a form of modular construction. |
1953 | Wireless World | Review of 1953 - from Wireless World Golden Jubilee edition April 1961 |
1953 | Valves | The new Mullard EF86 |
1953 | Valves | 1953: valves introduced and adverts published. |
1954 | Valves | Mullard introduce the EL34 25 Watt dissipation audio output pentode |
1954 | Television | Mullard offer Factory servicing of projection TV optics |
1954 | Transistor | Texas Instruments produces the first silicon transistor |
1954 | Wireless World | Review of 1954 - from Wireless World Golden Jubilee edition April 1961 |
1954 | Valves | The new Mullard QV06-20 a direct equivalent of the American 6146 |
1954 | 21st National Radio Show | 21st National Radio Show Report - from The Radio Constructor October, 1954. |
1954 | Valves | Mullard announce Special Quality voltage stabilisers and reference tubes |
1954 | Audio | Mullard 5-10 Amplifier. Full construction article here. |
1954 | Valves | 1954: valves introduced and adverts published. |
1955 | Television | On September 22nd the first commercial television program was transmitted in the UK |
1955 | Radio | STC Tymatic clock radio. |
1955 | Radio | Frequency Modulation Demonstration at the Science Museum |
1955 | Wireless World | Review of 1955 - from Wireless World Golden Jubilee edition April 1961 |
1955 | Valves | Testing Television Valves: M-OV table |
1955 | Valves | Trade news: Mullard EL34 audio output pentode |
1955 | Valves | Valves at the June Exhibition. |
1955 | Audio | An advert for the Mullard 5-10 Amplifier. |
1955 | Valves | Glassware for TV CRTs. |
1955 | Valves | 1955: valves introduced and adverts published. |
1956 | Wireless World | Review of 1956 - from Wireless World Golden Jubilee edition April 1961 |
1956 | Stereophony | Stereophony in the Home |
1956 | Circuit Assembly | Automatic Wiring A machine for wire-wrapping. |
1956 | Radio | Phoenetic Alphabet The standard phoenitic alphabet still used in the 21st century. |
1956 | Valves | GEC introduce valve type W729 for multi channel VHF television receivers. The valve is designed for minimum cross modulation distortion. |
1956 | Radio | New Life for the personal portable? |
1956 | Valves | In 1956 the British Valve industry produced 64 million valves and 2 million CRTs. 9% of world receiving valve production. World production was 743 million with the USA making 67% of them. |
1956 | Valves | Hivac open a pressurised valve factory |
1956 | Valves | Mullard High Power Triode for Industrial RF Generators |
1956 | Valves | GEC KT88 introduced |
1956 | Valves | BVA Statement Collective price fixing abandoned |
1956 | Television | STC Video Cables Advert. |
1956 | Television | More Lines or Colour a discussion paper. |
1956 | Mumetal Shields | Telcon Mumetal screens Advert. |
1956 | Transatlatic Cable | Completion of TAT-1 transatlantic telephone cable. |
1956 | Valves | 1956: valves introduced and adverts published. |
1957 | Valves | UHF receiving valves come to market |
1957 | Valves | The 110 degree TV tube is announced in America |
1957 | Valves | The Nixie display tubes are introduced |
1957 | Sputnik 1 | Artificial Satellites of the Earth - from Wireless World December 1957. |
1957 | Change | Crossroads of technology |
1957 | Wireless World | Review of 1957 - from Wireless World Golden Jubilee edition April 1961 |
1957 | Audio | The QUAD electrostatic loudspeaker is announced and goes into production |
1957 | Valves | 1957: valves introduced and adverts published. |
1958 | Loudspeakers | In France the Cabesse company invented the box-enclosed loudspeaker |
1958 | Lamps | Elmer Fridrich and Emmett Wily file a patent application on the tungsten halogen lamp |
1958 | Vacuum Pumps | Varian Associates introduce the 'modern' Vacsorb cryosorption pump |
1958 | Audio | Stereophony from discs. The specification for stereo records. |
1958 | Audio | Standards for Stereo Disc Records. |
1958 | Computer | The IMB 709 was introduced. This was the last major valve computer and featured magnetic core memory. |
1958 | Wireless World | Review of 1958 - from Wireless World Golden Jubilee edition April 1961. |
1958 | Wireless World | Stereo Radiograms A pedantic look at changing language. |
1958 | Computer | Computer Exhibition report - from Wireless World January 1959. This is fascinating! |
1958 | Valves | Wireless World review of the Physical Society's exhibition. Valves and CRT's. |
1958 | Television | The new BBC Television Centre development, further details, and VERA the video recorder. |
1958 | Metals | Telcon Mumetal shields advert. |
1958 | Metals | Corona Stabiliser Range advert. |
1958 | Valves | Radio Valve Data 6th edition published. |
1958 | Valves | 1958: valves introduced and adverts published. |
1959 | History | Anecdotage - Spark and Arc plus Anecdotage - Beam and Broadcast and Anecdotage - Television and Transistor recollections of the early years of Wireless and Television by P P Eckersley - the first BBC chief engineer. |
1959 | Computer | IBM 7090 introduced, this is the world's first all transistor computer |
1959 | Valves | The Varian Klystron VA842 introduced. This multi-cavity liquid-cooled Radar klystron is the largest documented production klystron |
1959 | Valves | Making and Selling Valves - a Wireless World editorial. |
1959 | Audio | IEE Convention on Stereophony, a Wireless World report. |
1959 | Audio | Stereophony on Trial, a Wireless World editorial from February. |
1959 | Audio | Single Amplifier Stereo, simplex stereo described. |
1959 | Audio | Quad electrostatic speaker advert and description. |
1959 | Ultrasonics | Ultrasonic Devices. An iconoscope with quartz faceplate. |
1959 | Wireless World | Review of 1959 - from Wireless World Golden Jubilee edition April 1961 |
1959 | Television | Annular electron Gun a development by RCA Laboratories in the USA. |
1959 | Television | Lead for Safety shielding against X-rays. |
1959 | Television | The 110° tubes were starting to appear and displace the older 70° and 90° types |
1959 | Television | First TV with 110° scanning angle. |
1959 | Television | Vacwell Engineering advert for TV CRT pumping machinery. |
1959 | Valves | Making of Klystron Grids |
1959 | CRT's | Ferranti CRT with Magnetic and electrostatic deflection |
1959 | Valves | 1959: valves introduced and adverts published. |
1960 | Vacuum Pumps | Varian Associates Inc. produce the 1000 Litre per second Valcon pump |
1960 | Legal | Mullard granted injuction. |
1960 | Television | Large Screen Colour TV the Eidophor system |
1960 | Television | Studio 5 A vast area for large productions |
1960 | Valves | Microwave Valves International Congress at Munich |
1960 | Valves | Ross Aiken develops CRT for aircraft and 14 inch thin CRT |
1960 | Valves | The Nuvistor is developed. See 6CW4 |
1960 | Radar | New Valves for High Quality Radar Systems and New Valves for Small-Boat Radar |
1960 | Audio | P P Eckersley's take on Hi-Fi in Wireless World. |
1960 | Space | Electronic Rocket Motors? |
1960 | Laser | Ali Javan invents the Helium-Neon gas discharge laser |
1960 | Wireless World | Review of 1960 - from Wireless World Golden Jubilee edition April 1961 |
1960 | Valves | 1960: valves introduced and adverts published. |
1961 | Vacuum Pumps | C H Kruger and A H Shapiro unveil statistical theory of turbo-molecular pumping |
1961 | Vacuum Pumps | Varian Associates Inc produce very large sorption pumps for roughing large chambers |
1961 | Television | The problems of modernising the UK television service |
1961 | Lamps | Gilbert Reiling files a US patent for 'modern' metal-halogen incandescent lamp |
1961 | Valves | William R Wheeler introduces the UHF metal-gasket captured step-seal |
1961 | Wireless World | Review of 1961 - from Wireless World Golden Jubilee edition April 1961 |
1961 | Valves | National Radio Show report from Wireless World |
1961 | Tape Recorder | New tape recorder, Grundig TK14. |
1961 | Valves | 1961: valves introduced and adverts published. |
1962 | Transistor | Fairchild Semiconductors produce the first integrated circuit |
1962 | Valves | Varian VA126 high power travelling wave tube introduced |
1962 | Valves | 1962: valves introduced and adverts published. |
1963 | Valves | In Mullard announced the PC86, PC88 and the DY86. |
1963 | Valves | Cathodeon introduce three storage tubes, Types C990, C991 & C992. |
1963 | Valves | AVO Valve Tester Mk4 adverts. |
1963 | Valves | Mullard ECH84. |
1963 | Valves | New English Electric Pulse Tetrode Type C1149/1. |
1963 | Valves | A rare BVA advert in a trade joiurnal. |
1963 | Valves | New M-OV Modulator Thyratron Type E2986. |
1963 | Valves | 1963: valves introduced and adverts published. |
1964 | Retail | Storm over proposed ending of Retail Price Maintenance. |
1964 | Valves | High Resolution CRT's from Ferranti. |
1964 | Valves | Gigantic new valve. |
1964 | Valves | Advert for electron guns. |
1964 | Valves | Mullard automatic envelope making machines. |
1964 | Valves | 1964: valves introduced and adverts published. |
1965 | Valves | 1965: valves introduced and adverts published. |
1966 | People | Vidor Batteries. With small transistor radios the teenager bacame the advertisers target audience. |
1966 | Television | Shadow-mask Tubes. Mullard at The Television & Radio Show 1966. |
1966 | People | Obituary - Captain H J Round. |
1966 | Valves | 1966: valves introduced and adverts published. |
1967 | Valves | Mullard Kradlepak - Easier opening. |
1967 | Valves | 1967: valves introduced and adverts published. |
1968 | Transistor | July 1968, Robert Noyce and Gordon Moore founded Intel |
1968 | Transistor | A Y Cho et al develop molecular-beam epitaxy |
1968 | Valves | 1968: valves introduced and adverts published. |
1969 | Vacuum Pumps | K H Mirgel produces the vertical uni-directional turbomolecular pump |
1969 | Valves | M-OV Golden Jubilee. |
1969 | Valves | English Electric Low Light Level TV Camera Tube. |
1969 | Valves | 1969: valves introduced and adverts published. |
1970 | Valves | New English Electric K3071 Oscillator Klystron. |
1970 | Valves | |
1970 | Valves | New Mullard Q13-110GU Flying Spot Scanner Tube. |
1970 | Valves | STC introduce a low-light camera. |
1970 | Valves | 1970: valves introduced and adverts published. |
1971 | Computer | Intel introduce the 4004, the world's first microprocessor. This was a 4-bit device in a 16 pin DIL package. |
1971 | Typesetting | Electronic Typesetting. |
1971 | Valves | 1971: valves introduced and adverts published. |
1972 | Valves | 1972: valves introduced and adverts published. |
1973 | People | Centenary of Lee de Forest's birth. |
1974 | Vacuum Pumps | First oil-free vacuum pump |
1975 | Computer | Altair computer with microprocessor introduced for home use |
1975 | Vacuum Pumps | NASA Cryo-pumps for space simulation and semiconductor manufacture |
1975 | Valves | 1975: valves introduced and adverts published. |
1976 | Measurements | AVO Meter Range Advert |
1976 | Computer | April 1976, Steve Jobs and Steve Wozniak found Apple computer |
1977 | Valves | Infrared Pyroelectric Vidicons |
1977 | Valves | Mass production of valves ends in most Western European countries and the USA |
1977 | Computer | December - NASCOM 1 announced |
1978 | Computer | June 1978, the industry standard 8086 16-bit microprocessor is made. It has 29,000 transistors and a clock speed of 4.77 MHz. It was made in quantity on 4-inch silicon wafers |
1978 | Valves | 1978: valves introduced and adverts published. |
1979 | Audio | Quad 33 Advert |
1979 | People | Death of Stanley R Mullard |
1980 | Valves | Methane Yields Improved Transmitting Valve Grids. |
1980 | Television | Mullard to 'Axe' TV Tube 900 Jobs |
1980 | Television | 405-Line Television to Close in UK |
1980 | History | Dame Nellie and Winifred share Broadcasting Anniversary |
1981 | Television | Re-building TV Tubes |
1981 | Television | Flat CRT from Sinclair |
1981 | Audio | QUAD ESL63 |
1983 | Valves | Is this year really the centenary of electronics? find out here |
1982 | Valves | Tetrode Klystron |
1986 | Valves | Raytheon close the last major valve production line in the USA |
1989 | Computer | The 1.2 million transistor Intel 80486 is produced. The initial clock frequency is 25 MHz |
1993 | Computer | Intel introduce the Pentium processor. This is fabricated on 8-inch wafers. The 8-inch wafer process having been developed in April 1992 |
2000 | Valves | The Valve Museum opens its virtual doors for the first time. |
