DC tv power plug?

If you got a barrel plug that fits from Radio Shack, the specific measurements are listed on the outside of the plastic bag it came in. Radio Shack lists barrel plug ends by letter, like "H". You can Google "what size is a Radio Shack "H" plug?" to get the measurements. You can find various wall-warts (transformers) at Amazon. You need to know the mA output of them, not just the voltage output. TV should list its input power requirements. 12V wall outlet should provide enough amperage to run it. And, contrary to what another poster stated, the center of a barrel connector is NOT always positive. The wall-wart that came with the set should have that listed on it, also.