[ADTech]

Philadelphia usually requires an all-channel combo due WPVI on channel 6 and WHYY on channel 12. The rest of the stations are all on UHF.

WPVI is actually running at 4X the power listed on TV Fool (they've applied to almost double it yet again), so it's 6 dB stronger than indicated. They bumped up the power to try to improve reception for indoor antenna users in the urban and suburban area and to help overcome the higher noise levels on low VHF.

When the boss was on the bus tour last year in Allentown, he said he was able to pick up WPVI with a C2V even though it's cut for high-VHF. Tons of transmitter power tends to overcome a too-small antenna up to a point.