I normally hang out in the CRT projector section but I'm having a nightmare with a second sender for sky. A TVlink kit. Here's the plot so far. RF voltage set to on Additional ariel plugged into RF2 Light on TV link is on Sky in bed room is crisp and sharp plug tvlink into back of sky box and trail receiver out of door and all works fine. Voltage measured on sky box is 8.45volts voltage upstairs is 8.11volts There is no booster involved. I'm happy the connectors are all good. Any one got any ideas? I'm pointing a finger at the voltage at the moment and if someone else could measure theirs it would be cool.