The 300 ohm aerial system in my house is alive and well with clean digital signals issuing forth on both VHF and UHF. It's only the modulation that's changed, not the bands in which it is transmitted.
Absolutely Aussie,
I know of quite a few people over here that still have 300 ohm ribbon feeding their TV sets, with (in some cases) a better picture than some RG-6 installations.
They are happy with it that way and I would never get them to change either.
All you need is a balun at the TV end to match the ribbon to the set impedance.
Magic.
