Without the "Y" splitter, if I am recording something from Cable, I am stuck with the cable channel on the main TV. The Y splitter allows me to watch say BBC1 while recording something dodgy from cable.
To be honest I don't suffer any noticeable lack of TV signal quality on the bedroom TV (but that's only a 14" portable). Yes using the co-axial signal on the main TV is not so hot, but it's only rarely that I watch that way.
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Myrmt

to Cable Forum
I presume you mean your TV does't have and scart or phono sockets, but your DVD player only has Scart / Phono leads. The simple option would be for you to buy a newer TV. You would get a better picture display simply due to the improved connectivity SCART offers.
If you must use coaxial, I'm sure there will be adaptors available that can convert a Scart into a co-axial signal, and then you will be able to daisy chanin your standard aerials in the normal way. I know simething of this type was supplied with my X-Box a couple of years ago.
A quick google came up with this:
http://www.beststuff.co.uk/labgear_m..._modulator.htm
http://www.satcure.co.uk/accs/rfmod2.htm