The short film Patrolling the Ether Was broadcast on this Sinclair broadcast group owned Television station in 1944?
Patrolling the Ether: Patrolling the Ether is a short film made in 1944 depicting amateur radio operators aiding the Federal Communications Commission in monitoring the airwaves for Nazi spy transmissions. Patrolling the Ether:  It is notable as the first film ever broadcast simultaneously on more than one television station; on 10 April 1944, it was shown on three stations: WNBT, New York (now WNBC), WPTZ Philadelphia (now KYW) and WRGB Schenectady, New York, marking a milestone in the history of network television. WRGB:  WRGB is owned by the Sinclair Broadcast Group, and is the CBS affiliate for the Albany-Schenectady-Troy television market.
WRGB