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Back in the early days of cable tv the channel capacity was limited to maybe a little over 13 channels. Cable companys only used channel locations near the Hi-Lo VHF Band including 2-13. As time went on so came more cable tv channels and more needed bandwith. They keep it as close to 2-13 as they could as there tends to be more signal line loss with the UHF Frequencys. The RF Amplifiers they used back then would only carry maybe 39 channels, such as cable channels 2 - 40. Also cable channels 23-64 is between VHF 13 and UHF 14.
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