The Concertzender internet radio site based in the Netherlands has an entire section devoted to the music of Duke Ellington which may be found here.
The particular jewel in the crown of these broadcasts, which seem to be archived permanently on-line, is a series of broadcasts built around particular albums. Here is the complete collection. The later programmes have been - and continue to be - produced by Ellington authority, Louis Tavecchio. The broadcasts are a wonderful resource. Commentaries, of course, are in Dutch. The sound of the music is pristine.
Programme 1: The Private Collection
Programme 2: The Private Collection Volume 2
Programme 3: The Private Collection Volume 3
Programme 4: The Private Collection Volume 4
Programme 5: The Private Collection Volume 5
Programme 6: The Private Collection Volume 6
Programme 7: The Private Collection Volume 7
Programme 8: The Private Collection Volume 8
Programme 9: The Private Collection Volume 9
Programme 10: The Private Collection Volume 10
Programme 11: The Best of Duke Ellington 1932-1939
Programme 12: The Best of Duke Ellington 1932-1939 Disc 2
Programme 13: The Best of Duke Ellington 1932-39 Disc 3
Programme 14: The Best of Duke Ellington 1932-39 Disc 4
Programme 15: Complete Columbia and RCA Victor Sessions Disc 1
Programme 16: Complete Columbia and RCA Victor Sessions Disc 2
Programme 17: Complete Columbia and RCA Victor Sessions Disc 3
Programme 18: Complete Columbia and RCA Victor Sessions Disc 4
Programme 19: Duke Ellington and his Famous Orchestra Soundies
Programme 20: Liberian Suite and Ellington/ Strayhorn Piano Duets
Programme 21: The Queen's Suite; The Goutelas Suite; The Uwis Suite
Programme 22: The Latin American Suite
Programme 23: Togo Brava Suite
Programme 24: Such Sweet Thunder
Programme 25: ... And His Mother Called Him Bill
Programme 26: Afro Bossa
Programme 27: New Orleans Suite
Programme 28: Newport 1956
Programme 29: Newport 1956 Part Two
Programme 30: Paris Concert
Programme 31: Paris Concert/ Virgin Isles
Programme 32: Ellington 66/ The Intimate Ellington
Programme 33: Money Jungle
Programme 34: Afro Bossa/ Mary Poppins
Programme 35: Mary Poppins/ Far East Suite
Programme 36: The Afro Eurasian Eclipse/ This One's For Blanton
Programme 37: The Afro Eurasian eclipse/ This One's For Blanton
Programme 38: The Piano Player
Programme 39: ...Meets John Coltrane and Coleman Hawkins
Programme 40: The Complete Variety, Vocalion and Okeh Small Groups
Programme 41: The Complete Variety, Vocalion and Okeh Small Groups
Programme 42: Highlights of the Great 1940-42 Band
Programme 43: Highlights of the Great 1940-42 Band
Programme 44: Highlights of the Great 1940-42 Band
Programme 45: Braggin' In Brass: The Immortal 1938 Year
Programme 46: Such Sweet Thunder
Programme 47: Three Suites/ The Great Paris Concert
Programme 48: The Cosmic Scene/ Private Collection Volume 3
Programme 49: New Orleans Suite/ Three Suites
Programme 50: The Ellington Suites/ The Latin American Suite
Programme 51: The Private Collection Volume 5/ The Ellington Suites
Programme 52: Blues In Orbit
Programme 53: Ellington and Armstrong: The Great Summit
Programme 54: Duke Ellington Meets Count Basie: First Time
Programme 55: Unknown Sessions/ Meets Coleman Hawkins
Programme 56: Piano Reflections/ Piano in the Foreground
Programme 57: Piano in the Foreground/ Money Jungle
Programme 58: Money Jungle/ Great Times
Programme 59: Trains
Programme 60: ... and His Mother Called Him Bill
Programme 61: All American In Jazz/ Midnight In Paris
Programme 62: The Great Paris Concert
Programme 63: Côte d'Azur Concerts
Programme 64: Côte d'Azur Concerts
Programme 65: Côte d'Azur Concerts
Programme 66: Jazz Classics in Digital Stereo
Programme 67: Jazz Classics in Digital Stereo
Programme 68: Early Ellington
Programme 69: Jubilee Stomp
Programme 70: 1932-1940 Brunswick, Columbia and Master Recordings
Programme 71: Jubilee Stomp; Early Ellington 1927-34
Programme 72: 1932-1940 Brunswick, Columbia and Master Recordings
Programme 73: 1932-1940 Brunswick, Columbia and Master Recordings
Programme 74: 1932-1940 Brunswick, Columbia and Master Recordings
Programme 75: 1932-1940 Brunswick, Columbia and Master Recordings
Programme 76: 1932-1940 Brunswick, Columbia and Master Recordings
Programme 77: 1932-1940 Brunswick, Columbia and Master Recordings
Programme 78: Live at The Blue Note
Programme 79: Live at The Blue Note
Programme 80: Ellington Live at Newport 1956
Programme 81: Ellington Live at Newport 1956
Programme 82: April 29th Birthday Sessions
Programme 83: April 29th Birthday Sessions
Programme 84: All Star Road Band Volume 2
Programme 85: Hot Summer Dance
Programme 86: Private Collection: Dance Dates, California 1958
Programme 87: Private Collection: Dance Dates, California 1958
Programme 88: Yale Concert; 1967 European Tour
Programme 89: Paris Jazz Concert 1965: Part 1
Programme 90: Paris Jazz Concert 1965: Part 2
Programme 91: Best of The California Concerts
Programme 92: Ella and Duke: Stockholm Concert; at the Côte d'Azur
Programme 93: In the Uncommon Market; Big Bands Live
Programme 94: Live in Zurich, Switzerland, 2 May, 1950
Programme 95: Tricky's Lick: Octet Live at The Rainbow Grill
Programme 96: 70th Birthday Concert
Programme 97: 1956-8 Small Group; Studio Sessions New York, 1963
Programme 98: Studio Sessions New York, 1957-62
Programme 99: Studio Sessions 1957-62; The Intimacy of The Blues
Programme 100: Studio: Chicago,San Francisco, New York, 1956-67
Programme 101: Togo Brava Suite
Programme 102: Carnegie Hall Concerts 1943-47
Programme 103: Orchestra, Composer and Pianist
Programme 104: Variety, Vocalion and Okeh Small Groups
Programme 105: Variety, Vocalion and Okeh Small Groups
Programme 106: Variety, Vocalion and Okeh/ Centennial Edition
Programme 107: Variety, Vocalion and Okeh/Centennial Edition
Programme 108: The Intimate Ellington/ Up In Duke's Workshop
Programme 109: Never Before Released Recordings
Programme 110: The Private Collection Volumes 3 & 8 Studio Sessions
Programme 111: The Private Collection Volumes 8 & 9 Studio Sessions
Programme 112: The Suites/ The Piano Player
Programme 113: Complete Columbia 1951-58/All Star Road Band Volume 2
Programme 114: Complete Columbia 1951-58/ Private Collection 2 & 6
Programme 115: Complete Columbia 1959-61/ live At Monterey 2
Programme 116: All American In Jazz/ Midnight In Paris
Programme 117: Anatomy of a Murder/ Paris Blues
Programme 118: A Drum Is A Woman/ Paris Blues
Programme 119: Ella Fitzgerald Sings Duke Ellington Songbook
Programme 120: ... Sings Ellington Songbook/ Ella At Duke's Place
Programme 121: Ellington Songbook/ Ella and Duke at the Côte d'Azur
Programme 122: London & New York 1963-4/ Uncommon Market/Live & Rare
Programme 123: This One's For Blanton/ Live At The Whitney
Programme 124: Heading For Newport 1956
Programme 125: Ellington and Hodges: Back To Back/ Side By Side
Programme 126: Will Big Bands Ever Come Back/ Recollections
Programme 127: Recollections Big Band Era/ Ellington 65
Programme 128: Jazz Violin Session/ Ellington 66
Programme 129: Jazz Violin Session/ Symphonic Ellington
Programme 130: Black, Brown and Beige/ Orchestral Works
Programme 131: Serenade To Sweden/ Second Sacred Concert
Programme 132: Sweden/ Second/ Third Sacred Concert
Programme 133: All American In Jazz/ Midnight In Paris
Programme 134: Featuring Paul Gonsalves/ Côte d' Azur
Programme 135: Columbia Studio Albums 1959-61/Newport 1958
Programme 136: The Capitol Sessions 1953-55
Programme 137: The Capitol Sessions 1953-55
Programme 138: Best of the California Concerts
3 August 2019: My People
Programme 139: Rare Live Recordings1952-3
Programme 140: Orchestra, Composer and Pianist
Programme 141: World Broadcasting Series 1943
Programme 142: World Broadcasting Series 1943 and 1945
Programme 143: World Broadcasting Series 1945
Programme 144: Capitol Transcriptions
Programme 145: Capitol Transcriptions 1945-46
Programme 146: Capitol Transcriptions 1946-47
Programme 147: The Treasury Shows Volumes 14 and 23
Programme 148: Money Jungle/ Duke's Big 4
Programme 149: The Piano Player
Programme 150: Latin American Suite
Programme 151: April 29 Birthday sessions
Programme 152: 70th Birthday Concert
Programme 153: The Complete Gus Wildi Recordings
Programme 154: Rotterdam 1969
Programme 155: De Doelen, 29 October, 1971
Programme 156: At The Hurricane
Programme 157: The Treasury Shows
Programme 158: The Treasury Shows Volume 7
Programme 159: Falcon Theatre, Copenhagen 1965
Programme 160: DR TV Centre, Copenhagen 1967
Programme 161: The Treasury Shows
Programme 162: The Treasury Shows
Programme 163: The Treasury Shows
Programme 164: London and New York 1963-64
Programme 165: Holiday Ballroom 1957/ Stratford Festival 1956
Programme 166: Raisin' the Rent/ Jubilee Stomp
Programme 167: Duke at Fargo 1940
Programme 168: Duke at Fargo
Programme 169: Duke at Fargo/ Hotel Sherman
Programme 170: Raisin' The Rent/ All God's Chillun
Programme 171: Never No Lament: The Blanton-Webster Band 1940-42
Programme 172: At The Cotton Club
Programme 173: Concert of Sacred Music
Programme 174: Second Sacred Concert
Programme 175: Concert of Sacred Music
Programme 176: In Gröna Lund, 1963
Programme 177: In Gröna Lund, 1963
Programme 178: Carnegie Hall Concerts 1943/47
Programme 179: Carnegie Hall Concerts 1943/47
Programme 180: Carnegie Hall Concerts 1943/7
Programme 181: Carnegie Hall Concerts 1943/7
Programme 182: Carnegie hall Concerts 1943/7
Programme 183: First Annual Tour of the Pacific Northwest, Spring 1952
Programme 184: The Greatest Jazz Concert in the World
Programme 185: The Greatest Jazz Concert in the World
Programme 186: Conductor, Composer, Pianist
Programme 187: Hollywood Empire, 1949
Programme 188: Dooji: The Click, Philadelphia, November 22, 1948
Programme 189: Dooji: Frank Dailey’s Meadowbrook Inn, June 1951
Programme 190: Chronological Classics: August - September 1951
Programme 191: All American In jazz/ Midnight in Paris
Programme 192: Duke Ellington at The Cotton Club
Programme 193: Programme Transcriptions Produced by Carl Hällström
Programme 194: The Duke In Washington
Programme 195: Happy Reunion and New Mood Indigo
Programme 196: Conductor, Composer and Pianist
Programme 197: The Symphonic Ellington
Programme 198: Conductor, Composer and Pianist
Programme 199: Johnny Hodges and his Orchestra
Programme 200: Ella Fitzgerald, Charles Mingus, Stevie Wonder
Programme 201: Ella Fitzgerald, Joe Pass, Tony Overwater Trio
Programme 202: Pasquale Grasso; Calefax Reeds; Lorraine Feather
Programme 203: Pretty Woman
Programme 204: Queen's Suite, Goutelas, UWIS
Programme 205: Treasury Show Volumes 16,19, 20
Programme 206: At the Hurricane -1943 Broadcasts Featuring Ben Webster
Programme 207: Duke's Joint
Programme 208: Daybreak Express
Programme 209: The Treasury Shows Volume 14
Programme 210: The Lost Recordings and Sweden 1973
Programme 211: The Great Concerts - Cornell University 1948
Programme 212: The Great Concerts - Cornell University 1948
Programme 213: Berlin 1959 and Live at the Philharmonic Hall 1973
Programme 214: The Treasury Shows Volumes 24 and 25
Programme 215: The MOMA Recital
Programme 216: ORTF Paris Recital, 2 July 1970
Programme 217: Classics in Digital Stereo
Programme 218: Classics in Digital Stereo Swing 1930-38
Programme 219: Stereo Reflections In Ellington
Programme 220: Blanton Webster Band Alternate Takes
Programme 221: Alternate Takes: 1940-41; 42-47
Programme 222: SESAC Label
Programme 223: Teatro Sistina Concert 1967
Programme 224: Teatro Sistina;Liederhalle, Stuttgart
Programme 225: de Dolen 29 October 1971
Programme 226: America Dances
Programme 227: Octet, San Remo, 22 March, 1964
Programme 228: Duke Ellington Octet at The Rainbow Grill, August 1967
Programme 229: Live At The Whitney, 1972
Programme 230: Ellington The Pianist
Programme 231: At The Piano - Une Anthologie
Programme 232: At The Piano - Piano In The Foreground
Programme 233: Standard Transcriptions
Programme 234: My People
Programme 235: Braggin' In Brass: The Immortal 1938 Year
Programme 236: Braggin In Brass: The Immortal 1938 Year: 2
Programme 237: 1939
Programme 238: The Duke's Men
Programme 239: Cootie Williams and his Rug Cutters
Programme 240: Johnny Hodges and his Orchestra
Programme 241:Johnny Hodges, Rex Stewart, Barney Bigard Small Groups
Programme 242: Ellington Stockpile: 1956-63
Programme 243: Ellington Stockpile 1962-63
Programme 244: Ellington Stockpile
Programme 245: Unknown Session
Programme 246: The Cosmic Scene
Programme 247: Quartets, Quintets, Octets
Programme 248: ... Plays Mary Poppins
Programme 249: Will The Big Bands Ever Come Back?
Programme 250: 250 Episodes of Duke Ellington!!!
Programme 251: More of Louis Tavecchio's Favourites
Programme 252: More of Louis Tavecchio's Favourites 2
Programme 253: Will The Big Bands Ever Come Back/ Ellington 65
Programme 254: Louis Armstrong and Duke Ellington - The Great Summit
Programme 255: All Ellington
Programme 256: All Ellington 2
Programme 257: Cool Rock
Programme 258: Copenhagen, 1958
Programme 259: Louis Armstrong and Duke Ellington
Programme 260: And His Mother Called Him Bill
Programme 261: Ella Fitzgerald and Duke Ellington, 1966
Programme 262: Train Compositions
Programme 263: Nutcracker/Peer Gynt/ French Chansons
The search page for all the references to Duke Ellington on the Concertzender website may be found here.