On the 20th in 1921...KDKA in Pittsburgh established the world's first radio newsroom and started one of the first daily radio newscasts in the country, reporting from the city desk of The Pittsburgh Post.
On the 21st in 1941..."The Second Mrs. Burton" premiered on the CBS Radio Network.
On the 21st in 1943...WNYC FM call letters debut
On the 21st in 1948..."Life With Luigi" debuted on the CBS Radio Network.
On the 20th in 1953...Jimmy Stewart debuted NBC's radio western, "The Six Shooter".
On the 21st in 1968...The Crazy World of Arthur Brown roared up the chart from 60 to 15 with "Fire".
On the 21st in 1968...Harry Harrison does last show at WMCA 570 AM. He's headed 77 WABC
On the 20th in 1970...Bob Grant does first show at WMCA 570 AM as WMCA flips from Top40 to Talk.
On the 20th in 1973...The great Jim Croce, who was on the verge of superstardom, died at age 30 when his light plane crashed shortly after takeoff in Natchitoches, Louisiana.
The rest of a great Top 10: Phil Collins and No Jacket Required, Billy Joel with Greatest Hits, Volume I & Volume II, Whitney Houston's debut at #8, the self-titled Heart at 9 and Motley Crue was bringing up the rear with Theatre of Pain.
The rest of the Top 10: Run-D.M.C. with their remake of the Aerosmith classic "Walk This Way" (never remake classics...). The rest of the Top 10: Canada's Glass Tiger with "Don't Forget Me (When I'm Gone)", Daryl Hall's solo hit "Dreamtime", Janet Jackson had "When I Think of You" which moved from 14 to 7, Stacey Q and "Two of Hearts", Berlin was down with their former #1 "Take My Breath Away" and Billy Ocean's sixth but next-to-last Top 10 "Love Zone" was #10.
On the 21st in 1994...First mobile AM HD Radio reception; transmitted from Xetron, Cincinnati over a distance of about 6 miles
On the 20th in 1997…Bob Hudson, of the radio and recording comedy duo Hudson & Landry, died at age 66.
He was consistently ranked among the top 10 DJs in Southern California from 1957 until his retirement in 1988. Hudson worked at a variety of LA radio stations, including KFWB, KBLA, KEZY, KFI and KGBS, and came to prominence when he replaced Bob Eubanks as morning man on KRLA in 1963. In 1966, Billboard ranked Hudson #1 in his morning drive time slot.
After Hudson & Landry split up, Hudson continued working in radio, including a stint at WMEX, later WITS, in Boston, until his retirement.