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Using UHF channels C61 to C69? Time to retune
As from today, the whole of the "800MHz" band belongs to Three, EE, Vodafone and O2. If you are not a giant telecoms company, and are using still them for anything, now is probably a good time to stop.
Since 1964, the UHF band (channel 21 to channel 68) has been used exclusively for television services.
The main use, of course, has been over-the-air signals to bring five analogue (and latterly lots of extra digital) TV channels, but a secondary use has been for what is called "RF modulation".
In the days before SCART cables, and long before the not ubiquitous HDMI connections, if you wanted to get a signal from a device such as a video recorder, a games console, home computer or a satellite decoder to a TV set, the only option was to "modulate" it.
If you are still using a device with an RF modulator, you need to check that the channel allocated is not in the C61-C69 range. If it is, then you need to change it for two reasons: to stop an "illegal broadcast" interfering with 4G devices, and to stop 4G transmissions interrupting your video.
I live in ST11 postcode area and have recently started to get interference on bedroom & dining room TV's thro' SkyMagic eye. RF is set to 68 which now appears to be used by 02. Which would be the best RF output channel to use in my area.
Neil H: Hi, Neil. Channel 38 ought to be OK. Don't use 35, or anything from 39 to 46, because these are all used by Sutton Coldfield to transmit tv signals to houses. Also, don't use anything in the range 21 to 27, because these channels are used by the Fenton (near Stoke) tv relaytransmitter. Don't use the upper 40s or mid-50s as these are used by Waltham in the East Midlands.Other possible channels you could try are 29 and 30, but NOT 31 or 37, also used by Waltham. Anything at 59 or over can be used by 4G mobile phone services. Richard, Norwich.