We do have a rather large frequency range within the Short Wave, Medium Wave, VHF, and UHF. These are split into bands, aerials can be designed with traps and as 1/4 wave for one band and 1/2 wave for another, this
is a typical duel band aerial note the lump in the centre which allows whole aerial to be used with one frequency and part with another, the other method is band pass filters, plates like this
have filters built in to split the signals but it needs multi aerials to be combined to start with
as shown, and I is amazing how many people think the radio will work from the TV/Radio splitter without combining first. It seems some of the retail outlets are the same.
Screwfix questions said:
Do Dab and UHF signals feed in through a single coaxial cable? Does it need a specific cable connector(s)?
the answer was
Schneider Electric said:
Thank you for the enquiry this would be related to the satellite or dish you have this picks up the signals and sends down a coax cable., like freeview tv etc.
which simply does not answer the question,
Screwfix do sell a range of boxes to combine and split an example is shown with a VHF and UHF input, no DAB so it would need a special duel band aerial as well, and the spec for the box says "Carries FM, DAB, Digital TV & Freeview" which seems odd as I thought Freeveiw was Digital TV? and frequency range 470-782 MHz which seems to be terrestrial TV only?
I am sure
@Lucid could tell us exactly what needs to go in the loft and what needs to go in the living room to get all the range, but to get the DAB signal into the room is not easy in mid Wales, on the Cheshire plan it is likely much easier but the big question is why bother, we have satellite or terrestrial TV into most homes and these also have radio broadcasts, so why mess around with another band with extra aerials? Well in the main so we can turn off the TV screen. The Icecrypt STC3250CCIHD box I use has got audio outputs, and I can select radio, and it is duel band Freeveiw and Satellite, the only problem is I need to turn TV on as a display to see what I am doing, the display on the box is useless, down stairs I use Sky Q and yes I can press button and simply say Radio 4 extra and I can select without turning on TV.
But it is so much easier to simply say hay google play radio 4 extra and let Nest Mini do it's job. OK not the best speakers, but it's easy, one plugged in either side of the room, no aerial wires, no wires other than the power, there are others that do the same, alexa for example, if I want HiFi it is a CD or DVD, but if just want to listen to the goon show really don't need HiFi which is what is on Radio 4 extra now.