Satellite TV: Will an LNB amplifier help?
Terrestrial TV: Will a TV amplifier help?
IMPORTANT: When a power supply is used to feed an amplifier upstairs, any wall plate MUST be a non-isolated type, otherwise the aerial signal will get through but the DC power won't. An isolated (decoupled) plate is often marked with a capacitor symbol -||- so if yours has this (or obviously has capacitors fitted inside) don't use it unless you short-circuit the capacitors. In addition, any "TV plug" between the PSU and amplifier must be soldered to the cable, otherwise a poor or intermittent connection is likely to interrupt viewing now or in the future.
SAFETY NOTICE: Electrical equipment which is installed in a loft or roof space should, wherever possible, be mounted on a brick or concrete surface. There have been rare instances of equipment catching fire so every precaution should be taken to prevent spread of fire. Powered equipment needs good ventilation and should be kept away from flammable materials such as cardboard, paper, plastic etc. Where a separate power supply is used, mount it on a wall with good ventilation. On no account lie it on a carpet or rug.
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