On the back of receivers there is a 12volt trigger jack . I would like for someone to please help me . I have not seen what the plug looks like to buy one. I do not want to try the wrong one and burn my stuff up- especially when I just bought a new receiver. I saw at RadioShack, they had a six inch fan that was 12volt. With this fan already being 12 volt, I do not need anything else in the chain but plug-wire-fan, do I?