 DuMont survived the early 1950s only because of WDTV in Pittsburgh , the lone commercial VHF station in what was then the sixth @-@ largest market . WDTV 's only competition came from UHF stations and distant stations from Johnstown , Pennsylvania ; Youngstown , Ohio ; and Wheeling , West Virginia . No other commercial VHF station signed on in Pittsburgh until 1957 , giving WDTV a de facto monopoly on television in the area . Since WDTV carried secondary affiliations with the other three networks , DuMont used this as a bargaining chip to get its programs cleared in other large markets . 
 DuMont survived the early 1950s only because of WDTV in Pittsburgh , the lone commercial VHF station in what was then the sixth @-@ largest market . WDTV <a href='null_genetive' title='1'><mark>'s</mark></a>only competition came from UHF stations and distant stations from Johnstown , Pennsylvania ; Youngstown , Ohio ; and Wheeling , West Virginia . No other commercial VHF station signed on in Pittsburgh until 1957 , giving WDTV a de facto monopoly on television in the area . Since WDTV carried secondary affiliations with the other three networks , DuMont used this as a bargaining chip to get its programs cleared in other large markets . 
DuMont survived the early 1950s only b/c of WDTV in Pittsburgh , da lone commercial VHF station in wat was then the sixth @-@ largest market . WDTV  only competition came from UHF stations and distant stations from Johnstown , Pennsylvania ; Youngstown , Ohio ; and Wheeling , West Virginia . No other commercial VHF station signed on in Pittsburgh until 1957 , giving WDTV a de facto monopoly on television in tdaarea . Since WDTV carried secondary affiliations with the other three networks , DuMont used this as a bargaining chip to get its programs cleared in other bigass markets .