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Santiago asked Why does not the TV have start with channel 1?
I noticed that the TVs have start with channel 2 instead of channel 1. I am wondering why for a long time. I searched on the TVs channel system. I noticed that the channel 3 is 60Mhz frequency and channel 4 is 66Mhz. So, the channel 2 could be 54Mhz and channel 1 could be 48Mhz frequency. The frequency allocation could be changed over time. So, what is wrong with the 48Mhz? I am wondered that why did they remove channel 1 for TV? Thank you for take your time to answer this question.
And got the following answer:
Propagation theories at that time predicted that television signals would not be received over the horizon -- but they were, quite readily. So, even with just 50 stations on the air, interference problems were beginning to appear. Meanwhile, the FCC had reduced the minimum distance between stations using the same channel to just 80 miles. An engineering study released by the FCC warned of interference problems if immediate action wasn't taken. That lead to an FCC report issued on may 5, 1949, that rules that television could no longer share its frequencies with fixed and mobile services, and that the 72 to 76 MHz band could be used for fixed radio services only. But where could the mobile services be located if they could no longer share the television allocations, and could no longer be used for use the 72 to 76 MHz band? There was only one place to go -- the television industry would have to give up another television channel. But which channel would that be? The American Radio Relay League (an association of amateur radio operators) urged that Channel 2 be deleted so that the second harmonics of the 28-29.7 MHz amateur radio band would not interfere with television reception. The television industry, although not pleased about losing yet another television channel, agreed that 12 clear channels were preferable to 12 shared channels. If they had to lose a channel, they preferred that it be Channel 1, because its absence would have the least impact on commercial television. The FCC went along with the television industry's position, and on June 14, 1948, Channel 1 was deleted from the allocation plan. Channel 1"s frequencies were assigned to the land and mobile services. At the same time, the FCC decided not to renumber the channels -- that is what happened to Channel 1.
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