Piggybacking onto the HD stream of its Washington, D.C. “Fan” WJFK (106.7) will be the streams of three other major CBS all-sports stations from the East coast. Those are New York’s “Fan” WFAN, Philadelphia’s WIP and Baltimore’s WJZ-FM. Philadelphia will be on the HD-4 channel, New York on HD-3, and Baltimore will be carried on HD-2. CBS is calling it “the nation’s first sports ‘Quadcast’ radio station.” To accomplish the feat, it’s using the new HPX 30 transmitter from Harris, and the recently-authorized higher power level for HD Radio. The Harris FlexStar is the first unit to allow broadcast of an HD-4 signal, adding onto the usual HD, HD-2 and HD-3. Listeners will need HD Radio receivers, and of course all four stations are already available online through their streams.