Enthusiasts; Yesterday in my usual CC/BB sweepthrough I found the Sony HD-300 box for $269.. It was "open box" but it came in the original box, was resealed etc..looked like a local return. Since I want HD and everyone raves about this box I nabbed it. Upon opening it it was complete except for the RF antenna that jacks into the rear of the unit. On the Sony site they want $76 (!) for this part. Question..any way to "make" an RF antenna? looks like a 1/4" phone jack and some wire. Many thanks!