branding opb channels digital 10 vhf virtual 10 psip subchannels 10.1 pbs 10.2 pbs encore 10.3 opb radio affiliations pbs 1970 present owner oregon public broadcasting 1 first air date february 6 1961 ; 55 years ago 1961 02 06 as koap tv call letters meaning oregon public broadcasting former callsigns koap tv 1961 1989 former channel number s analog 10 vhf 1961 2009 digital 27 uhf 2001 2009 former affiliations net 1961 1970 transmitter power 32.4 kw height 524 metres 1 719 feet facility id 50589 transmitter coordinates 45 31 21 n 122 44 45 w 45.52250 n 122.74583 w 45.52250 ; 122.74583 licensing authority fcc public license information profile cdbs website www.opb.org kopb tv is a public television station serving the portland oregon television market . it is owned and operated by oregon public broadcasting . it broadcasts its digital signal on vhf channel 10 . contents 1 history 2 digital television 2.1 digital channels 2.2 analog to digital conversion 3 references 4 external links history edit kopb tv originally signed on the air as koap tv on february 6 1961 . 2 the call sign letters stood for oregon agricultural portland preceded by the k prefix the federal communications commission uses when assigning call signs for stations west of the mississippi river . 3 it was a sister station to koac tv in corvallis oregon whose call letters carried over from koac am which received them in the mid 1920s during its early years broadcasting as an am radio station stood for oregon agricultural college oregon state university s original name . koap was first housed at the campus of portland state college with the transmitter being located on council crest . 3 koap tv was a member of net or national educational television carrying its programs . on april 30 1962 koap tv s fm sister service koap fm signed on the air . by 1966 most local programs originated at koap tv . originally known on air as oeb oregon educational broadcasting the organization running the station changed its name in early 1972 to oepbs oregon educational & public broadcasting service . the network was spun off from the state board of education in october 1981 and renamed oregon public broadcasting . at the same time the network moved to portland and koap fm tv became the flagship stations . on february 15 1989 koap changed their call letters to kopb for both radio and television . 4 opb was a pioneer in hdtv . as early as march 5 1997 opb s experimental hdtv station transmitted a random bit data stream . on september 15 1997 opb portland was assigned the experimental call letters kaxc for channel 35 . then on october 11 1997 at 4 37 p.m. kaxc became the first tv station in oregon and one of the first on the west coast to transmit an hdtv picture . after experimentation ended channel 35 was vacated . on december 7 2001 kopb dt began operation on channel 27 . digital television edit digital channels edit the station s digital channel is multiplexed channel video aspect psip short name programming 5 10.1 1080i 16 9 kopb main kopb tv programming pbs 10.2 480i 4 3 opbplus pbs encore 10.3 opb fm opb radio main programming sap audio channel 1 analog to digital conversion edit kopb tv shut down its analog signal over vhf channel 10 on june 12 2009 the official date in which full power television stations in the united states transitioned from analog to digital broadcasts under federal mandate . the station s digital signal relocated from its pre transition uhf channel 27 to vhf channel 10 . 6 7 references edit nelson bob june 2 2009 . call letter origins . 238 . the broadcast archive . retrieved june 21 2009 . educational tv wins good opening response . february 7 1961 . the oregonian p. 9 . a b swing william february 5 1961 . portland to get first glimpse of educational tv monday . the sunday oregonian p. 33 . farrell peter february 15 1989 . not all of elephant has dumbo cuteness tv column headed by review of new national geographic special . the oregonian p. f7 . excerpt new name after more than a quarter century portland s public television and radio stations have new call letters . koap has become kopb for oregon public broadcasting . rabbitears tv query for kopb dtv tentative channel designations for the first and the second rounds pdf . retrieved 2012 03 24 . cdbs print dead link external links edit oregon public broadcasting homepage pbs homepage kopb engineering site about broadcast facilities of kopb kopb tower about broadcast facilities of kopb query the fcc s tv station database for kopb tv biafn s media web database information on kopb tv v t e television in portland salem oregon and vancouver washington full power stations katu 2.1 abc 2.2 metv 2.3 comet koin 6.1 cbs 6.2 gettv 6.3 decades koac tv pbs opb 7.1 hd 7.2 plus 7.3 fm kgw 8.1 nbc 8.2 justice 8.3 estrella tv kopb tv pbs opb 10.1 hd 10.2 plus 10.3 fm kptv 12.1 fox 12.2 cozi tv 12.3 laff kpxg 22.1 ion 22.2 qubo 22.3 ion life 22.4 ion shop 22.5 qvc over air 22.6 hsn 22.7 tmd knmt 24.1 tbn 24.2 tcc 24.3 juce tv smile 24.4 enlace 24.5 tbn salsa krcw tv 32.1 the cw 32.2 antenna tv 32.3 this tv kpdx 49.1 mntv 49.2 escape low power stations krcw lp 5 the cw kors cd 16.1 silent unknown kwvt ld 17.1 youtoo 27.1 rtv 37.1 aza kjwy lp 21 religious kjyy ld 26.1 religious kslm ld 27.1 rtv 17.1 a1 37.1 aza koxi cd 20.1 silent unknown kork cd 35.1 silent unknown keve ld 36.1 3abn kkei cd 38.1 silent unknown koxo ld 41.1 silent unknown kpxg ld 42.1 daystar kgwz ld 46.1 ind. kunp ld 47.1 uni 47.2 mundomax 47.3 grit k50gg 50 mntv la grande ktvr pbs opb 13.1 hd 13.2 plus 13.3 fm kunp 16.1 uni 16.2 mundomax k23db 23 mntv k26fv 26 nbc k29el 29 cbs k31gn 31 the cw k33fs 33 fox k35ga 35 abc the dalles k06ni 6 a1 k07yv 7 cbs krhp ld 14.1 fn 14.2 legacy tv 14.4 juce tv k18hh 18 abc k31hz 31 pbs k51eh 51 fox k59ek 59 nbc k69ah 69 mntv cable only csn northwest cvtv vancouver wa root sports northwest northwest cable news tvw olympia wa defunct kvdo 3 ind. pbs kxpd lp 52 aza see also seattle eugene bend yakima tri cities and boise tv v t e pbs member stations in the state of oregon opb koac 7 kepb 29 corvallis eugene kopb 10 portland koab 11 bend ktvr 13 la grande soptv ksys 8 kfts 22 medford klamath falls see also abc cbs cw fox ion mynetworktv nbc pbs other stations in oregon retrieved from https en.wikipedia.org w index.php title kopb tv & oldid 744390131 categories pbs member stationstelevision channels and stations established in 1961television stations in portland oregon1961 establishments in oregondigital low power stationshidden categories all articles with dead external linksarticles with dead external links from april 2014 navigation menu personal tools not logged intalkcontributionscreate accountlog in namespaces article talk variants views read edit view history more search navigation main pagecontentsfeatured contentcurrent eventsrandom articledonate to wikipediawikipedia store interaction helpabout wikipediacommunity portalrecent changescontact page 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