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Originally Posted by Jeffhs
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The only problem I have with DTV right now, however, is I cannot get two important network affiliates on channels 8 and 19, using an indoor antenna. I have been told with the latter channel, the problem is its DTV assignment on a VHF channel (channel 10); with the former, the problem seems to be my sheer distance from the station's transmitter. I could get the missing channels with an outdoor antenna, but since my Roku seems to work so well with streaming video, I don't feel I need it.
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Channel 8 (WJW/FOX) actually transmits on channel 8, which makes it a VHF-high station. It doesn't have as much power as its Detroit stablemate WJBK. It does benefit from having an omnidirectional pattern and infrequent co-channel interference.
Channel 10 (WOIO/CBS, and soon to be joined by WUAB's programs) is not as lucky. It is short-spaced to CFPL in London, Ontario. Worse, most of this path is over Lake Erie, which often causes serious interference (from tropospheric refraction) in the spring and summer. As a result, WOIO has less power, has a directional pattern with less signal to the north, and is prone to having its signal trounced by CFPL.
You may be able to get CBS with a modest VHF-capable outdoor antenna on the chimney, or, if that is not possible, in the attic.
In my case, the Detroit stations are fifty miles away*. The ABC affiliate is 1000kW ERP on channel 41, while the Fox station is 27kW ERP on channel 7. The ABC is the easiest Detroit station to get on the indoor antenna, but the Fox station is the easiest to receive on the outdoor antenna, despite the massive disparity in ERP.
*the NBC affiliate is 52 miles, while one independent station is 63 miles and on a short tower. The latter is only receivable when tropospheric refraction is in.