On 2/8/12 2:41 PM, Terry Casey wrote:
The same was true of cable systems. As TV sets were incapable of
operating with adjacent channels, they carried only alternate channels.

Dutch cable tv provider Casema used a scheme like 24 28 31 35 38 42 etc.
Interference products tended to be out of the used channels.

When tv sets became better over time many more channels were used,
including most VHF channels.

gr, hwh