Estações de televisão pré -guerra
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Present North American broadcast television starts at 54 MHz (VHF)Present day UK TV broadcasts begin at 470 MHz (UHF)Television stationsTelevisioncall sign(original)Televisioncall sign(current)Television frequency*Televisionchannel(current)Location(city)On airOwner (original)Original broadcast systemCurrent broadcast systemBaird Television Development Company Ltd via BBC transmitter 2LO[citation needed]361 meters831 kHz 
London, England, United Kingdom1926-1935[citation needed] British Broadcasting CompanyMechanical television 30 lines25 frame/s [dubious – discuss]W2XB (also branded as WGY-TV from its sister radio station)WRGB2.15 MHz6
SchenectadyAlbany, New York, United StatesMay 10, 1928- presentGeneral Electric Co.Mechanical television 24 (later 48) lines/21 frame/sNTSC-M from 1942–2009; now ATSC digital.W1XAY (also branded as WLEX from its sister radio station)3.5 MHz Lexington, Massachusetts, United StatesJune 14, 1928– March 1930The Boston PostMechanical television 48 lines/18 frame/sW3XK1.605 MHz & 6.42 MHz, later 2.00–2.10 MHz WheatonWashington, D.C., United StatesJuly 2, 1928– 1932Charles Jenkins LaboratoriesMechanical television 48 linesW2XAL (also branded as WRNY from its sister radio station) New York City, New York, United StatesAugust 13, 1928– 1929Experimenter PublishingCurtiss Airplane and Motor Company
Mechanical television 48 linesW1WX(later became W1XAV)2.12 MHz Boston, Massachusetts, United StatesSpring 1929–1931Shortwave and Television LaboratoryMechanical television 48 & 60 lines/15 frame/sW2XBSWNBC2.75–2.85 MHzFormerly Channel 1;moved to VHF Channel 4 from 1946–2009 (remains PSIP virtual channel);allocated to digital channel 28 from 1999–2018;moved to channel share with WNJU on channel 36 from 2018–present New York City, New York, United States1929–1932, 1936–presentNational Broadcasting CompanyMechanical television 60 lines/20 frame/s1941–2009, NTSC-M; now ATSC digital3UZ. Experiments carried out on the radio station after it had officially closed down for the night. 930 kHz
Melbourne, Victoria, Australia1929Oliver John NilsenMechanical television3DB. Experiments carried out on the radio station after it had officially closed down for the night. 1180 kHz Melbourne, Victoria, Australia1929The Herald and Weekly TimesMechanical televisionW9XAPWNBQ-TV (1948–1964) Agora WMAQ-TV
VHF Channel 5 Chicago, Illinois, United StatesAugust 27, 1930– August 1933. 1948-present. National Broadcasting CompanyMechanical television1948–2009 NTSC-M; now ATSC digitalVE9EC41 MHz
Montreal, Quebec, Canada1931–1935La Presse and CKAC radioMechanical television 60–150 linesW6XAOKCBS-TVFormerly on Channel 1, now VHF Channel 2 Los Angeles,California, United States June 1931– 1933, 1937–1948 as experimental Don Lee station; May 6, 1948–presentDon LeeMechanical television, film only, 80 lines/20 frame/s1948–2009, NTSC-M; now ATSC digitalAmateur radio station 4CM 136 metres Brisbane, Queensland, Australia1934Dr Val McDowallEarly experiments with electronic televisionW6XYZKTLA-TVFormerly on Channel 4, now VHF Channel 5 Los Angeles,California, United StatesJune 1942– 1946 experimental, Jan. 22, 1947– presentParamount1947–2009, NTSC-M, now ATSC digitalW2XABWCBS-TV2.1–2.2 MHzNow VHF Channel 2 New York City, New York, United StatesJuly 31, 1931– February 1933,1939–presentColumbia Broadcasting SystemMechanical television 60 lines/20 frame/s1941–2009, NTSC-M, now ATSC digitalW2XWVWNYWChannel 4 (1938–1944), Channel 5 (1944 – present) New York City, New York, United States1938– presentAllen B. DuMontUnknown1944–2009 NTSC-M, now ATSC digitalW3XEWPTZ (now KYW-TV)–VHF Channel 3 Philadelphia, Pennsylvania, United States1932–presentPhilco CorporationMechanical television1941–2009, NTSC-M, now ATSC digitalW9XBKWBKB (now WBBM-TV)Formerly on Channel 4, then on VHF Channel 2, Now on VHF Channel 12 Chicago, Illinois, United States1940–presentBalaban & Katz1944–2009, NTSC-M, now ATSC digitalW9XZVLater KS2XBS (Phonevision experimental on Channel 2)VHF Channel 1 Chicago, Illinois, United States1939–19532LO (BBC Television Service)BBC One361 meters831 kHz UHF (Channels 21–68, throughout UK) London, England, United KingdomAugust 22, 1932– September 11, 1935British Broadcasting CorporationMechanical television 30 lines/12.5 frame/sNow DVBBBC Television Service (Alexandra Palace)BBC One45 MHz[citation needed]UHF (Channels 21–68, throughout UK and on Astra 2D satellite) London, England, United KingdomNovember 1936– September 3, 1939, June 7, 1946 – presentBritish Broadcasting CorporationMechanical television 240 lines (Baird system) and electronic television 405 line (Marconi-EMI system)/25 frame/sNow DVBEIAR – Stazione sperimentale radiovisione di Monte MarioRAI – Radiotelevisione Italiana40.54 MHz (audio), 44.12 MHz (video)VHF (channel 9) and UHF (channels 25, 26, 30 and 40)
Rome, ItalyJuly 22, 1939– May 10, 1940Electronic television 441 lines / 21 to 42 frame/s.Now DVBEIAR – Stazione sperimentale radiovisione Torre Littoria (now Torre Branca)40.50 MHz (audio), 44.00 MHz (video) Milan, ItalyApril 12–28, 1940Electronic television 441 lines / 21 to 42 frame/s.Radiovision PTT (1935) later Paris Television (1943) then RTF (1946) (Eiffel Tower)TF137 MHz (180 & 455 l.) later 42–46 MHz (441 lines)UHF Channels 21–69 (System L + DVB throughout France and FTA on AB3 satellite)
Paris, FranceNovember 1935 – 1937 (60 lines, then 180 lines) later 1938–1939 (455 lines) then 1943–1956 (441 lines)Ministry of InformationMechanical television 60 then 180 line later electronic television 455 then 441 line/25 frame/sNow DVBFernsehsender Paul Nipkow
BerlinPotsdam, Germany1935–1944 (tests started in 1929)Deutscher Fernseh-RundfunkElectronic television 180 lines/25 frame/s/50 fields/sec (started broadcasting in 441 lines in mid-1937)Moscow test broadcasting station МТЦ (from Shukhov tower)LW band
Moscow, Soviet Union, now 
Russia1931–1941Mechanical televisionUSSR TV (ТВ СССР)Первый канал49.75 MHz (video) 56.25 MHz (audio)TV channels:R1 (441 lines 25 fps)
Moscow, USSR, now Russia1938–1941, 1945-1949Ministry of CultureElectronic televisionNow SECAM, PAL also DVBDoświadczalna Stacja TelewizyjnaTelewizja PolskaTVP channels: TVP1, TVP2, etc.
Warszawa, Poland1935–1939 (test broadcasting: 1937–38)Mechanical televisionNow PAL and DVBTelevisionCall sign(Original)TelevisionCall sign(Current)Television frequencyTelevision channel(Current)City/locationOn airOwner (Original)Original broadcast systemCurrent broadcast system